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  • 1. Aili, Daniel
    et al.
    Tai, Feng-I
    Enander, Karin
    Baltzer, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Liedberg, Bo
    Self-assembly of fibers and nanorings from disulfide-linked helix-loop-helix polypeptides2008In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 47, no 30, p. 5554-5556Article in journal (Refereed)
  • 2.
    Andersen, Thomas L.
    et al.
    Aarhus Univ, Carbon Dioxide Activat Ctr CADIAC, Dept Chem, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark.;Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark..
    Nordeman, Patrik
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Molecular Imaging.
    Christoffersen, Heidi F.
    Aarhus Univ, Carbon Dioxide Activat Ctr CADIAC, Dept Chem, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark.;Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark..
    Audrain, Helene
    Aarhus Univ Hosp, Dept Nucl Med, DK-8000 Aarhus, Denmark.;Aarhus Univ Hosp, PET Ctr, DK-8000 Aarhus, Denmark..
    Antoni, Gunnar
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Molecular Imaging.
    Skrydstrup, Troels
    Aarhus Univ, Carbon Dioxide Activat Ctr CADIAC, Dept Chem, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark.;Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark..
    Application of Methyl Bisphosphine-Ligated Palladium Complexes for Low Pressure N-C-11-Acetylation of Peptides2017In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 56, no 16, p. 4549-4553Article in journal (Refereed)
    Abstract [en]

    A mild and effective method is described for C-11-labeling of peptides selectively at the N-terminal nitrogen or at internal lysine positions. The presented method relies on the use of specific biphosphine palladium-methyl complexes and their high reactivity towards amino-carbonylation of amine groups in the presence [C-11] carbon monoxide. The protocol facilitates the production of native N-C-11-acetylated peptides, without any structural modifications and has been applied to a selection of bioactive peptides.

  • 3. Andrews, Lester
    et al.
    Wang, Xuefeng
    Lindh, Roland
    Department of Theoretical Chemistry, Lund University.
    Roos, Bjoern O
    Marsden, Colin J.
    Simple N UF3 and P UF3 molecules with triple bonds to uranium2008In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 47, no 29, p. 5366-5370Article in journal (Refereed)
  • 4.
    Arkhypchuk, Anna I.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Santoni, Marie-Pierre
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Ott, Sascha
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Cascade Reactions Forming Highly Substituted, Conjugated Phospholes and 1,2-Oxaphospholes2012In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 51, no 31, p. 7776-7780Article in journal (Refereed)
    Abstract [en]

    The reaction of a phospha-Wittig–Horner reagent with diacetylenic ketones (see scheme) results in a cascade of reactions that can lead to both an oxaphosphole-terminated cumulene system and an alkene-bridged bis-phosphole. The reaction outcome is determined by the nature of the acetylene termini, with phenyl groups stabilizing a carbene intermediate that dimerizes to give the bis-phosphole product.

  • 5.
    Arkhypchuk, Anna
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Svyaschenko, Yurii
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Orthaber, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Ott, Sascha
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Mechanism of the Phospha-Wittig-Horner Reaction2013In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 52, no 25, p. 6484-6487Article in journal (Refereed)
  • 6. Bach, Anders
    et al.
    Chi, Celestine N.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Pang, Gar F.
    Olsen, Lars
    Kristensen, Anders S.
    Jemth, Per
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Strømgaard, Kristian
    Design and synthesis of highly potent and plasma-stable dimeric inhibitors of the PSD-95-NMDA receptor interaction2009In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 48, no 51, p. 9685-9689Article in journal (Refereed)
    Abstract [en]

    On the double: Dimerization of monomeric peptide ligands towards the PDZ domains of the protein PSD-95 (postsynaptic density 95) leads to potent inhibitors of protein-protein interactions with stability in blood plasma. Optimization of the length of the polyethylene glycol linker results in unprecedented affinity for inhibitors of the PDZ1-2 domain.

  • 7. Beahm, Brendan J
    et al.
    Dehnert, Karen W
    Derr, Nicolas L
    Kuhn, Joachim
    Eberhart, Johann K
    Spillmann, Dorothe
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Amacher, Sharon L
    Bertozzi, Carolyn R
    A visualizable chain-terminating inhibitor of glycosaminoglycan biosynthesis in developing zebrafish2014In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 53, no 13, p. 3347-3352Article in journal (Refereed)
    Abstract [en]

    Heparan sulfate (HS) and chondroitin sulfate (CS) glycosaminoglycans (GAG) are proteoglycan-associated polysaccharides with essential functions in animals. They have been studied extensively by genetic manipulation of biosynthetic enzymes, but chemical tools for probing GAG function are limited. HS and CS possess a conserved xylose residue that links the polysaccharide chain to a protein backbone. Here we report that, in zebrafish embryos, the peptide-proximal xylose residue can be metabolically replaced with a chain-terminating 4-azido-4-deoxyxylose (4-XylAz) residue by administration of UDP-4-azido-4-deoxyxylose (UDP-4-XylAz). UDP-4-XylAz disrupted both HS and CS biosynthesis and caused developmental abnormalities reminiscent of GAG biosynthesis and laminin mutants. The azide substituent of protein-bound 4-XylAz allowed for rapid visualization of the organismal sites of chain termination in vivo through bioorthogonal reaction with fluorescent cyclooctyne probes. UDP-4-XylAz therefore complements genetic tools for studies of GAG function in zebrafish embryogenesis.

  • 8.
    Caleman, Carl
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology.
    van der Spoel, David
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology.
    Picosecond Melting of Ice by an Infrared Laser Pulse2008In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 47, no 8, p. 1417-1420Article in journal (Refereed)
    Abstract [en]

    Cold as ice: Molecular dynamics simulation provides snapshots of a melting ice crystal (see picture). The laser pulse heats up the system, and the energy is absorbed in the OH bonds. After a few picoseconds, the energy is transferred to rotational and translational energy, causing the crystal to melt. The melting starts as a nucleation process, and even long after the first melting is initialized, pockets of crystalline structures can be found.

  • 9.
    Chi N, Celestine
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. ETH.
    Vögeli, Beat
    Bibow, Stefan
    Strotz, Dean
    Orts, Julien
    Güntert, Peter
    Riek, Roland
    A Structural Ensemble for the Enzyme Cyclophilin Reveals an Orchestrated Mode of Action at Atomic Resolution.2015In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 54, no 40, p. 11657-61Article in journal (Refereed)
    Abstract [en]

    For enzyme activity, an exact structural and motional orchestration of the active site and its surroundings is believed to be key. In order to reveal such possible phenomena at atomic resolution on the basis of experimental evidence, an experimental restraint driven two-state ensemble of the prototypical enzyme cyclophilin was determined by using a recently introduced exact NOE approach. The ensemble description reveals the presence of an open and a closed state of cyclophilin, which is indicative of large-scale correlated motion. In the open state, the catalytic site is preorganized for catalysis, thus suggesting the mechanism of action to be conformational sampling, while the ligand-binding loop appears to act through an induced fit mechanism. This finding is supported by affinity measurements of a cyclophilin designed to be more open. Overall, more than 60-70 % of the side-chain conformations of cyclophilin appear to be correlated.

  • 10.
    Crüsemann, Max
    et al.
    Univ Bonn, Inst Pharmazeut Biol, Bonn, Germany.
    Reher, Raphael
    Schamari, Isabella
    Univ Bonn, Inst Pharmazeut Biol, Bonn, Germany.
    Brachmann, Alexander O
    ] Eidgenoss Tech Hsch ETH Zurich, Inst Mikrobiol, Zurich, Switzerland.
    Ohbayashi, Tsubasa
    Univ Paris Sud, CEA, Gif Sur Yvette, France.
    Kuschak, Markus
    Malfacini, Davide
    Seidinger, Alexander
    Pinto-Carbó, Marta
    Richarz, René
    Reuter, Tatjana
    Kehraus, Stefan
    Hallab, Asis
    Attwood, Misty M.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Functional Pharmacology.
    Schiöth, Helgi B
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Functional Pharmacology.
    Mergaert, Peter
    Kikuchi, Yoshitomo
    Bioprod Res Inst AIST Hokkaido, Sapporo, Japan.
    Schäberle, Till F
    Kostenis, Evi
    Wenzel, Daniela
    Müller, Christa E
    Piel, Jörn
    Carlier, Aurélien
    Univ Ghent, Dept Biochem & Microbiol, Ghent, Belgium.
    Eberl, Leo
    König, Gabriele M
    Heterologous Expression, Biosynthetic Studies, and Ecological Function of the Selective Gq-Signaling Inhibitor FR9003592018In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 57, no 3, p. 836-840Article in journal (Refereed)
    Abstract [en]

    The cyclic depsipeptide FR900359 (FR), isolated from the tropical plant Ardisia crenata, is a strong and selective inhibitor of Gq proteins, making it an indispensable pharmacological tool to study Gq-related processes, as well as a promising drug candidate. Gq inhibition is a novel mode of action for defense chemicals and crucial for the ecological function of FR, as shown by in vivo experiments in mice, its affinity to insect Gq proteins, and insect toxicity studies. The uncultured endosymbiont of A. crenata was sequenced, revealing the FR nonribosomal peptide synthetase (frs) gene cluster. We here provide a detailed model of FR biosynthesis, supported by in vitro enzymatic and bioinformatic studies, and the novel analogue AC-1, which demonstrates the flexibility of the FR starter condensation domains. Finally, expression of the frs genes in E. coli led to heterologous FR production in a cultivable, bacterial host for the first time.

  • 11.
    Demory, Emilien
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Devaraj, Karthik
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC. Uppsala Univ, Dept Chem BMC, S-75123 Uppsala, Sweden..
    Orthaber, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Gates, Paul J.
    Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England..
    Pilarski, Lukasz T.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Boryl (Hetero)aryne Precursors as Versatile Arylation Reagents: Synthesis through C-H Activation and Orthogonal Reactivity2015In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 54, no 40, p. 11765-11769Article in journal (Refereed)
    Abstract [en]

    (Pinacolato)boryl ortho-silyl(hetero)aryl triflates are presented as a new class of building blocks for arylation. They demonstrate unique versatility by delivering boronate or (hetero)aryne reactivity chemoselectively in a broad range of transformations. This approach enables the unprecedented postfunctionalization of fluoride-activated (hetero)aryne precursors, for example, as substrates in transition-metal catalysis, and offers valuable new possibilities for aryl boronate postfunctionalization without the use of specialized protecting groups.

  • 12.
    Dinér, Peter
    et al.
    Center for Catalysis Department of Chemistry, Aarhus University.
    Nielsen, Martin
    Marigo, Mauro
    Jørgensen, Karl Anker
    Enantioselective organocatalytic conjugate addition of N heterocycles to alpha,beta-unsaturated aldehydes2007In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 46, no 12, p. 1983-1987Article in journal (Refereed)
  • 13.
    Díaz-Álvarez, Alba E.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Mesas Sanchez, Laura
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Dinér, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Non-Enzymatic Dynamic Kinetic Resolution of Secondary Aryl Alcohols: Planar Chiral Ferrocene and Ruthenium Catalysts in Cooperation2013In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 52, no 2, p. 502-504Article in journal (Refereed)
  • 14.
    Emanuelsson, Rikard
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Physical Organic Chemistry.
    Wallner, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Ng, Eugene A. M.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Smith, J. R.
    Nauroozi, Djawed
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Ott, Sascha
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Ottosson, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Physical Organic Chemistry.
    Cross-hyperconjugation: An unexplored orbital interaction between pi-conjugated and saturated molecular segments2013In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 52, no 3, p. 983-987Article in journal (Refereed)
    Abstract [en]

    Crossing a barrier: Molecules with saturated ER2 units (E=C or Si, R=electron-releasing group) inserted between two π-conjugated segments have electronic and optical properties that resemble those of cross-conjugated molecules (see figure). This cross-hyperconjugation provides a deeper understanding of the conjugation phenomenon, and is an alternative to cross-conjugation in the design of molecules for nano and materials applications.

  • 15. Erdem, Oezlen F.
    et al.
    Schwartz, Lennart
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
    Stein, Matthias
    Silakov, Alexey
    Kaur-Ghumaan, Sandeep
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
    Huang, Ping
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Molecular Biomimetics.
    Ott, Sascha
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Molecular Biomimetics.
    Reijerse, Edward J.
    Lubitz, Wolfgang
    A Model of the [FeFe] Hydrogenase Active Site with a Biologically Relevant Azadithiolate Bridge: A Spectroscopic and Theoretical Investigation2011In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 50, no 6, p. 1439-1443Article in journal (Refereed)
    Abstract [en]

    Convincing evidence for the presence of a nitrogen atom in the dithiolate bridge of the active site of native [FeFe] hydrogenases (B) is provided by a spectroscopic, electrochemical, and theoretical study of a well-characterized structural mimic of the [FeFe] hydrogenase subcluster (picture: 14N matched-HYSCORE spectrum of the model compound A). This result should help to understand the mechanism of dihydrogen conversion and production.

  • 16. Garcia-Bosch, Isaac
    et al.
    Company, Anna
    Cady, Clyde W.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
    Styring, Stenbjörn
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Molecular Biomimetics.
    Browne, Wesley R.
    Ribas, Xavi
    Costas, Miquel
    Evidence for a Precursor Complex in C-H Hydrogen Atom Transfer Reactions Mediated by a Manganese(IV) Oxo Complex2011In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 50, no 25, p. 5648-5653Article in journal (Refereed)
  • 17.
    Gibson, Elizabeth A.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry.
    Smeigh, Amanda L.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
    Le Pleux, Loic
    Fortage, Jerome
    Boschloo, Gerrit
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry.
    Blart, Errol
    Pellegrin, Yann
    Odobel, Fabrice
    Hagfeldt, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry.
    Hammarström, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Chemical Physics.
    A p-Type NiO-Based Dye-Sensitized Solar Cell with an Open-Circuit Voltage of 0.35 V2009In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 48, no 24, p. 4402-4405Article in journal (Refereed)
    Abstract [en]

    In tandem: Employing a molecular dyad and a cobalt-based electrolyte gives a threefold-increase in open-circuit voltage (VOC) for a p-type NiO device (VOC=0.35 V), and a fourfold better energy conversion efficiency. Incorporating these improvements in a TiO2/NiO tandem dye-sensitized solar cell (TDSC), results in a TDSC with a VOC=0.91 V

  • 18. Gogoll, Adolf
    et al.
    Toom, Lauri
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry.
    Grennberg, Helena
    Ligand-Induced Formation of an Adamantanoid Hexanuclear (π-Allyl)PdII(μ3-Hydroxo) Cluster Stacked as Hydrogen-Bonded Double Strands2005In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 44, no 30, p. 4729-4731Article in journal (Refereed)
  • 19.
    Hsu, Yu-Cheng
    et al.
    Acad Sinica, Inst Chem, Taipei 11529, Taiwan;Natl Taiwan Univ, Dept Chem, Taipei 10161, Taiwan.
    Wang, Vincent Cho-Chien
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. Acad Sinica, Inst Chem, Taipei 11529, Taiwan.
    Au-Yeung, Ka-Chun
    Acad Sinica, Inst Chem, Taipei 11529, Taiwan.
    Tsai, Chung-Yu
    Acad Sinica, Inst Chem, Taipei 11529, Taiwan.
    Chang, Chun-Chi
    Acad Sinica, Inst Chem, Taipei 11529, Taiwan.
    Lin, Bo-Chao
    Acad Sinica, Inst Chem, Taipei 11529, Taiwan.
    Chan, Yi-Tsu
    Natl Taiwan Univ, Dept Chem, Taipei 10161, Taiwan.
    Hsu, Chao-Ping
    Acad Sinica, Inst Chem, Taipei 11529, Taiwan.
    Yap, Glenn P. A.
    Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA.
    Jurca, Titel
    Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA;Univ Cent Florida, Cluster Rational Design Catalysts Energy Applicat, Orlando, FL 32816 USA.
    Ong, Tiow-Gan
    Acad Sinica, Inst Chem, Taipei 11529, Taiwan;Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 300, Taiwan.
    One-Pot Tandem Photoredox and Cross-Coupling Catalysis with a Single Palladium Carbodicarbene Complex2018In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 57, no 17, p. 4622-4626Article in journal (Refereed)
    Abstract [en]

    The combination of conventional transition-metal-catalyzed coupling (2e(-) process) and photoredox catalysis (1e(-) process) has emerged as a powerful approach to catalyze difficult cross-coupling reactions under mild reaction conditions. Reported is a palladium carbodicarbene (CDC) complex that mediates both a Suzuki-Miyaura coupling and photoredox catalysis for C-N bond formation upon visible-light irradiation. These two catalytic pathways can be combined to promote both conventional transition-metal-catalyzed coupling and photoredox catalysis to mediate C-H arylation under ambient conditions with a single catalyst in an efficient one-pot process.

  • 20. Iesmantavicius, Vytautas
    et al.
    Dogan, Jakob
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Jemth, Per
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Teilum, Kaare
    Kjaergaard, Magnus
    Helical Propensity in an Intrinsically Disordered Protein Accelerates Ligand Binding2014In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 53, no 6, p. 1548-1551Article in journal (Refereed)
    Abstract [en]

    Many intrinsically disordered proteins fold upon binding to other macromolecules. The secondary structure present in the well-ordered complex is often formed transiently in the unbound state. The consequence of such transient structure for the binding process is, however, not clear. The activation domain of the activator for thyroid hormone and retinoid receptors (ACTR) is intrinsically disordered and folds upon binding to the nuclear coactivator binding domain (NCBD) of the CREB binding protein. A number of mutants was designed that selectively perturbs the amount of secondary structure in unbound ACTR without interfering with the intermolecular interactions between ACTR and NCBD. Using NMR spectroscopy and fluorescence-monitored stopped-flow kinetic measurements we show that the secondary structure content in helix1 of ACTR indeed influences the binding kinetics. The results thus support the notion of preformed secondary structure as an important determinant for molecular recognition in intrinsically disordered proteins.

  • 21.
    Jeon, Il
    et al.
    Univ Tokyo, Dept Mech Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan.
    Ueno, Hiroshi
    Northeast Normal Univ, Sch Chem, Changchun 130024, Jilin, Peoples R China.
    Seo, Seungju
    Univ Tokyo, Dept Mech Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan.
    Aitola, Kerttu
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Nishikubo, Ryosuke
    Osaka Univ, Dept Appl Chem, Osaka 5650871, Japan.
    Saeki, Akinori
    Osaka Univ, Dept Appl Chem, Osaka 5650871, Japan.
    Okada, Hiroshi
    Univ Tokyo, Dept Mech Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan.
    Boschloo, Gerrit
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Maruyama, Shigeo
    Univ Tokyo, Dept Mech Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan;Natl Inst Adv Ind Sci & Technol, Res Inst Energy Conservat, Tsukuba, Ibaraki 3058564, Japan.
    Matsuo, Yutaka
    Univ Tokyo, Dept Mech Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan;Northeast Normal Univ, Sch Chem, Changchun 130024, Jilin, Peoples R China.
    Lithium-Ion Endohedral Fullerene (Li+@C-60) Dopants in Stable Perovskite Solar Cells Induce Instant Doping and Anti-Oxidation2018In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 57, no 17, p. 4607-4611Article in journal (Refereed)
    Abstract [en]

    Herein, we report use of [Li+@C-60]TFSI- as a dopant for spiro-MeOTAD in lead halide perovskite solar cells. This approach gave an air stability nearly 10-fold that of conventional devices using Li+TFSI-. Such high stability is attributed to the hydrophobic nature of [Li+@C-60]TFSI- repelling moisture and absorbing intruding oxygen, thereby protecting the perovskite device from degradation. Furthermore, [Li+@C-60]TFSI- could oxidize spiro-MeOTAD without the need for oxygen. The encapsulated devices exhibited outstanding air stability for more than 1000h while illuminated under ambient conditions.

  • 22.
    Johnson, Ben A.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Maji, Somnath
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Agarwala, Hemlata
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    White, Travis A.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Mijangos, Edgar
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Ott, Sascha
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Activating a Low Overpotential CO2 Reduction Mechanism by a Strategic Ligand Modification on a Ruthenium Polypyridyl Catalyst2016In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 55, no 5Article in journal (Refereed)
    Abstract [en]

    The introduction of a simple methyl substituent on the bipyridine ligand of [Ru(tBu(3)tpy)(bpy)(NCCH3)](2+) (tBu(3)tpy = 4,4',4''-tri-tert-butyl-2,2':6',2''-terpyridine; bpy = 2,2'-bipyridine) gives rise to a highly active electrocatalyst for the reduction of CO2 to CO. The methyl group enables CO2 binding already at the one-electron reduced state of the complex to enter a previously not accessible catalytic cycle that operates at the potential of the first reduction. The complex turns over with a Faradaic efficiency close to unity and at an overpotential that is amongst the lowest ever reported for homogenous CO2 reduction catalysts.

  • 23. Kaiser, N F K
    et al.
    Bremberg, U
    Larhed, M
    Moberg, C
    Hallberg, A
    Fast, convenient, and efficient molybdenum-catalyzed asymmetric allylic alkylation under noninert conditions: An example of microwave-promoted fast chemistry2000In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 39, no 20, p. 3596-3598Article in journal (Refereed)
  • 24.
    Kaur-Ghumaan, Sandeep
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Molecular Biomimetics.
    Schwartz, Lennart
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Molecular Biomimetics.
    Lomoth, Reiner
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Chemical Physics.
    Stein, Matthias
    Ott, Sascha
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Molecular Biomimetics.
    Catalytic Hydrogen Evolution from Mononuclear Iron(II) Carbonyl Complexes as Minimal Functional Models of the [FeFe] Hydrogenase Active Site2010In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 49, no 43, p. 8033-8036Article in journal (Refereed)
    Abstract [en]

    How much iron does it take? Mononuclear complexes [FeII(3,6-R2bdt)(CO)2(PMe3)2] (bdt=1,2-C6H4(S)2; R=H, Cl) can be reversibly protonated at the sulfur ligands, can catalyze the electrochemical reduction of protons, and are thus minimal functional models of the [FeFe] hydrogenases (see scheme). DFT calculations show that cleavage of an FeS bond leads to the generation of a free coordination site, which is crucial for the formation of hydrides that are key intermediates in the generation of hydrogen.

  • 25.
    Kumar, Shailesh
    et al.
    IISER Bhopal.
    Yan, Jiajie
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Poon, Jia-fei
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Singh, Vijay P
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Lu, Xi
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Ott, Marjam Karlsson
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Engman, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Kumar, Sangit
    IISER Bhopal.
    Multifunctional Antioxidants: Regenerable Radical-Trapping and Hydroperoxide-Decomposing Ebselenols2016In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 55, no 11, p. 3729-3733Article in journal (Refereed)
    Abstract [en]

    Regenerable, multifunctional ebselenol antioxidants were prepared that could quench peroxyl radicals more efficiently than -tocopherol. These compounds act as better mimics of the glutathione peroxidase enzymes than ebselen. Production of reactive oxygen species (ROS) and reactive nitrogen species (RNS) in human mononuclear cells was considerably decreased upon exposure to the organoselenium compounds. At a concentration of 25m, the ebselenol derivatives showed minimal toxicity in pre-osteoblast MC3T3cells.

  • 26. Lange, Kathrin M.
    et al.
    Koennecke, Rene
    Soldatov, Mikhail
    Golnak, Ronny
    Rubensson, Jan-Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Soft X-Ray Physics.
    Soldatov, Alexander
    Aziz, Emad F.
    On the Origin of the Hydrogen-Bond-Network Nature of Water: X-Ray Absorption and Emission Spectra of Water-Acetonitrile Mixtures2011In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 50, no 45, p. 10621-10625Article in journal (Refereed)
    Abstract [en]

    A liquid microjet was used to obtain oxygen K-edge X-ray absorption and emission spectra of water–acetonitrile mixtures of various compositions. The observed spectral changes are unambiguously related to the increasing number of broken hydrogen bonds with decreasing water concentration, and the hydrogen-bond network of liquid water can thus be addressed on purely experimental grounds without the need for theoretical modeling.

  • 27. Li, Hairong
    et al.
    Fu, Kunwu
    Hagfeldt, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Graetzel, Michael
    Mhaisalkar, Subodh G.
    Grimsdale, Andrew C.
    A Simple 3,4-Ethylenedioxythiophene Based Hole-Transporting Material for Perovskite Solar Cells2014In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 53, no 16, p. 4085-4088Article in journal (Refereed)
    Abstract [en]

    We report a novel electron-rich molecule based on 3,4-ethylenedioxythiophene (H101). When used as the hole-transporting layer in a perovskite-based solar cell, the power-conversion efficiency reached 13.8% under AM 1.5G solar simulation. This result is comparable with that obtained using the well-known hole transporting material 2,2,7,7-tetrakis(N,N-di-p-methoxyphenylamine)-9,9-spirobifluorene (spiro-OMeTAD). This is the first heterocycle-containing material achieving >10% efficiency in such devices, and has great potential to replace the expensive spiro-OMeTAD given its much simpler and cheaper synthesis.

  • 28.
    Lindgren, N. Johan V.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Geiger, Lars
    Schmuck, Carsten
    Razkin, Jesus
    Baltzer, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Downsizing of Enzymes by Chemical Methods: Arginine Mimics with Low pK(a) Values Increase the Rates of Hydrolysis of RNA Model Compounds2009In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 48, no 36, p. 6722-6725Article in journal (Refereed)
  • 29.
    Lindh, Jonas
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry. ORGFARM.
    Sjöberg, Per J. R.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry.
    Larhed, Mats
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry.
    Synthesis of aryl ketones by palladium(II)-catalyzed decarboxylative addition of benzoic acids to nitriles2010In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 49, no 42, p. 7733-7737Article in journal (Refereed)
  • 30.
    Meszaros, Livia S.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Nemeth, Brigitta
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Esmieu, Charlène
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Ceccaldi, Pierre
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Berggren, Gustav
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    InVivo EPR Characterization of Semi-Synthetic [FeFe] Hydrogenases2018In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 57, no 10, p. 2596-2599Article in journal (Refereed)
    Abstract [en]

    EPR spectroscopy reveals the formation of two different semi-synthetic hydrogenases invivo. [FeFe] hydrogenases are metalloenzymes that catalyze the interconversion of molecular hydrogen and protons. The reaction is catalyzed by the H-cluster, consisting of a canonical iron-sulfur cluster and an organometallic [2Fe] subsite. It was recently shown that the enzyme can be reconstituted with synthetic cofactors mimicking the composition of the [2Fe] subsite, resulting in semi-synthetic hydrogenases. Herein, we employ EPR spectroscopy to monitor the formation of two such semi-synthetic enzymes in whole cells. The study provides the first spectroscopic characterization of semi-synthetic hydrogenases invivo, and the observation of two different oxidized states of the H-cluster under intracellular conditions. Moreover, these findings underscore how synthetic chemistry can be a powerful tool for manipulation and examination of the hydrogenase enzyme under invivo conditions.

  • 31. O'Mahony, Flannan T. F.
    et al.
    Cappel, Ute B.
    Tokmoldin, Nurlan
    Lutz, Thierry
    Lindblad, Rebecka
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Rensmo, Håkan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Haque, Saif A.
    Low-Temperature Solution Processing of Mesoporous Metal-Sulfide Semiconductors as Light-Harvesting Photoanodes2013In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 52, no 46, p. 12047-12051Article in journal (Refereed)
  • 32.
    Orthaber, Andreas
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Löfås, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
    Öberg, Elisabet
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Grigoriev, Anton
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Wallner, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Jafri, S.Hassan M
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Santoni, Marie-Pierre
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Ahuja, Rajeev
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Leifer, Klaus
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Ottosson, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Ott, Sascha
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Cooperative Gold Nanoparticle Stabilization by Acetylenic Phosphaalkenes2015In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 54, no 36, p. 10634-10638Article in journal (Refereed)
  • 33.
    Ott, Sascha
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical Chemistry. Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry I.
    Kritikos, Mikael
    Åkermark, Björn
    Sun, Licheng
    Lomoth, Reiner
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry I.
    A Biomimetic Pathway for Hydrogen Evolution from a Model of the Iron Hydrogenase Active Site2004In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 43, p. 1006-1009Article in journal (Refereed)
  • 34. Pahl, Elke
    et al.
    Calvo, Florent
    Koci, Love
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Condensed Matter Theory.
    Schwerdtfeger, Peter
    Accurate Melting Temperatures for Neon and Argon from Ab Initio Monte Carlo Simulations2008In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 47, no 43, p. 8207-8210Article in journal (Refereed)
  • 35. Pengo, Paolo
    et al.
    Baltzer, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Pasquato, Lucia
    Scrimin, Paolo
    Substrate Modulation of the Activity of an Artificial Nanoesterase Made of Peptide-Functionalized Gold Nanoparticles2007In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 46, no 3, p. 400-404Article in journal (Refereed)
    Abstract [en]

    Nanozymes with a heart of gold: A functional artificial protein has been prepared by grafting a dodecapeptide onto the surface of gold nanoparticles (see picture). The system catalyzes the hydrolysis of carboxylate esters and features enzyme-like properties. (Figure Presented).

  • 36.
    Pershagen, Elias
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Physical Organic Chemistry.
    Borbas, K. Eszter
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Physical Organic Chemistry.
    Multiplex detection of enzymatic activity with responsive lanthanide-based luminescent probes2015In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 54, no 6, p. 1787-1790Article in journal (Refereed)
  • 37. Pérez-Perarnau, Alba
    et al.
    Preciado, Sara
    Palmeri, Claudia Mariela
    Moncunill-Massaguer, Cristina
    Iglesias-Serret, Daniel
    González-Gironès, Diana M
    Miguel, Miriam
    Karasawa, Satoki
    Sakamoto, Satoshi
    Cosialls, Ana M
    Rubio-Patiño, Camila
    Saura-Esteller, José
    Ramón, Rosario
    Caja, Laia
    Institut d’Investigacio Biomedica de Bellvitge (IDIBELL) L’Hospitalet de Llobregat, Spain.
    Fabregat, Isabel
    Pons, Gabriel
    Handa, Hiroshi
    Albericio, Fernando
    Gil, Joan
    Lavilla, Rodolfo
    A trifluorinated thiazoline scaffold leading to pro-apoptotic agents targeting prohibitins2014In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 53, no 38, p. 10150-10154Article in journal (Refereed)
    Abstract [en]

    A new class of small molecules, with an unprecedented trifluorothiazoline scaffold, were synthesized and their pro-apoptotic activity was evaluated. With an EC50 in the low micromolar range, these compounds proved to be potent inducers of apoptosis in a broad spectrum of tumor cell lines, regardless of the functional status of p53. Fast structure-activity relationship studies allowed the preparation of the strongest apoptosis-inducing candidate. Using a high performance affinity purification approach, we identified prohibitins 1 and 2, key proteins involved in the maintenance of cell viability, as the targets for these compounds.

  • 38. Sala, Xavier
    et al.
    Ertem, Mehmed Z.
    Vigara, Laura
    Todorova, Tanya K.
    Chen, Weizhong
    Rocha, Reginaldo C.
    Aquilante, Francesco
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Quantum Chemistry.
    Cramer, Christopher J.
    Gagliardi, Laura
    Llobet, Antoni
    The cis-[Ru-II(bpy)(2)(H2O)(2)](2+) Water-Oxidation Catalyst Revisited2010In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 49, no 42, p. 7745-7747Article in journal (Refereed)
  • 39.
    Savitski, Mikhail
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Kjeldsen, Frank
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Nielsen, Mikael
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Zubarev, Roman
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Complementary sequence preferences of electron-capture dissociation and vibrational excitation in fragmentation of polypeptide polycations2006In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 45, no 32, p. 5301-5303Article in journal (Refereed)
    Abstract [en]

    (Chemical Equation Presented) Complementary cleavage: A large-scale (ca. 15000 spectra) comparison between the cleavage sites and the preferences of collision-activated dissociation (CAD) and electron-capture dissociation (ECD) in tandem mass spectrometry has proved beyond doubt their complementary nature (see picture, red: high, blue: low). The study has also suggested the presence of a preferred N-terminal structure in gas-phase tryptic peptide dications.

  • 40.
    Savitski, Mikhail M.
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences, MMS, Medical Mass Spectrometry.
    Kjeldsen, Frank
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences, MMS, Medical Mass Spectrometry.
    Nielsen, Michael L.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences, MMS, Medical Mass Spectrometry.
    Garbuzynskiy, Sergiy O.
    Galzitskaya, Oxana V.
    Surin, Alexey K.
    Zubarev, Roman A.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences, MMS, Medical Mass Spectrometry.
    Backbone carbonyl group basicities are related to gas-phase fragmentation of peptides and protein folding2007In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 46, no 9, p. 1481-1484Article in journal (Refereed)
    Abstract [en]

    A strong correlation is found between the propensity of individual amino acids to induce peptide-bond cleavage in the gas phase (PAA-XX) and their structure-forming propensity (PS, red) and H-bond-accepting propensity (PH, blue). Thus, the same fundamental parameter, carbonyl group basicity, governs the formation of secondary protein structures in solution and directs fragmentation in the gas phase. (Graph Presented).

  • 41.
    Schäfer, Bernhard
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
    Öberg, Elisabet
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
    Kritikos, Mikael
    Ott, Sascha
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
    Incorporating Phosphaalkenes into Oligoacetylenes2008In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 47, no 43, p. 8228-8231Article in journal (Refereed)
  • 42. Suljoti, Edlira
    et al.
    Garcia-Diez, Raul
    Bokarev, Sergey I.
    Lange, Kathrin M.
    Schoch, Roland
    Dierker, Brian
    Dantz, Marcus
    Yamamoto, Kenji
    Engel, Nicholas
    Atak, Kaan
    Kuehn, Oliver
    Bauer, Matthias
    Rubensson, Jan-Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Aziz, Emad F.
    Direct Observation of Molecular Orbital Mixing in a Solvated Organometallic Complex2013In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 52, no 37, p. 9841-9844Article in journal (Refereed)
  • 43. Sá, Jacinto
    et al.
    Goguet, Alexandre
    Taylor, S F Rebecca
    Tiruvalam, Ramchandra
    Kiely, Christopher J
    Nachtegaal, Maarten
    Hutchings, Graham J
    Hardacre, Christopher
    Influence of methyl halide treatment on gold nanoparticles supported on activated carbon.2011In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 50, no 38, p. 8912-6Article in journal (Refereed)
  • 44.
    Tegler, Lotta T.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Nonglaton, Guillaume
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Büttner, Frank
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Caldwell, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
    Christopeit, Tony
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Danielson, U. Helena
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Biochemistry.
    Fromell, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
    Gossas, Thomas
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Larsson, Anders
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    Longati, Paola
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Norberg, Thomas
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry.
    Ramapanicker, Ramesh
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Rydberg, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Baltzer, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry.
    Powerful protein binders from designed polypeptides and small organic molecules: a general concept for protein recognition2011In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 50, no 8, p. 1823-1827Article in journal (Refereed)
    Abstract [en]

    High-affinity binders for the C-reactive protein (CRP), with dissociation constants in the pM to nM range and selectivities in human serum comparable to those of antibodies, were obtained by conjugation of 16 designed polypeptides to phosphocholine, a small molecule that binds CRP with a KDvalue of 5I . The polypeptides were not designed specifically to recognize CRP and bind by an adapted fit mechanism.

  • 45. Tian, Haining
    et al.
    Jiang, Xiao
    Yu, Ze
    Kloo, Lars
    Hagfeldt, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
    Sun, Licheng
    Efficient Organic-Dye-Sensitized Solar Cells Based on an Iodine-Free Electrolyte2010In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 49, no 40, p. 7328-7331Article in journal (Refereed)
  • 46. Tirel, Emmanuel Y.
    et al.
    Bellamy, Zoe
    Adams, Harry
    Lebrun, Vincent
    Duarte, Fernanda
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Computational and Systems Biology.
    Williams, Nicholas H.
    Catalytic Zinc Complexes for Phosphate Diester Hydrolysis2014In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 53, no 31, p. 8246-8250Article in journal (Refereed)
    Abstract [en]

    Creating efficient artificial catalysts that can compete with biocatalysis has been an enduring challenge which has yet to be met. Reported herein is the synthesis and characterization of a series of zinc complexes designed to catalyze the hydrolysis of phosphate diesters. By introducing a hydrated aldehyde into the ligand we achieve turnover for DNA-like substrates which, combined with ligand methylation, increases reactivity by two orders of magnitude. In contrast to current orthodoxy and mechanistic explanations, we propose a mechanism where the nucleophile is not coordinated to the metal ion, but involves a tautomer with a more effective Lewis acid and more reactive nucleophile. This data suggests a new strategy for creating more efficient metal ion based catalysts, and highlights a possible mode of action for metalloenzymes.

  • 47.
    Tricoli, Antonio
    et al.
    ETH, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland..
    Righettoni, Marco
    ETH, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland..
    Teleki, Alexandra
    ETH, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland..
    Semiconductor Gas Sensors: Dry Synthesis and Application2010In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 49, no 42, p. 7632-7659Article, review/survey (Refereed)
  • 48. Ulrich, Christian
    et al.
    Andersson, Olof
    Nyholm, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Inorganic Chemistry.
    Björefors, Fredrik
    Formation of Molecular Gradients on Bipolar Electrodes2008In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 47, no 16, p. 3034-3036Article in journal (Refereed)
  • 49.
    Valentini, Alessio
    et al.
    Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain.;Univ Siena, Dept Biotechnol Chem & Pharm, Via A Moro 2, I-53100 Siena, Italy..
    Rivero, Daniel
    Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain..
    Zapata, Felipe
    Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain..
    García-Iriepa, Cristina
    Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain.;Univ La Rioja, CISQ, Dept Quim, Madre Dios 53, Logrono 26006, Spain..
    Marazzi, Marco
    Univ Lorraine Nancy, Theory Modeling Simulat SRSMC, Nancy, France.;CNRS, Theory Modeling Simulat SRSMC, SRSMC Blvd Aiguillettes, Vandoeuvre Les Nancy, France..
    Palmeiro, Raúl
    Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain..
    Fernández Galván, Ignacio
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Theoretical Chemistry.
    Sampedro, Diego
    Univ La Rioja, CISQ, Dept Quim, Madre Dios 53, Logrono 26006, Spain..
    Olivucci, Massimo
    Univ Siena, Dept Biotechnol Chem & Pharm, Via A Moro 2, I-53100 Siena, Italy.;Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA.;Univ Strasbourg, CNRS, USIAS, F-67034 Strasbourg, France.;Univ Strasbourg, CNRS, Inst Phys & Chim Mat Strasbourg, F-67034 Strasbourg, France..
    Frutos, Luis Manuel
    Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain..
    Optomechanical Control of Quantum Yield in Trans-Cis Ultrafast Photoisomerization of a Retinal Chromophore Model2017In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 56, no 14, p. 3842-3846Article in journal (Refereed)
    Abstract [en]

    The quantum yield of a photochemical reaction is one of the most fundamental quantities in photochemistry, as it measures the efficiency of the transduction of light energy into chemical energy. Nature has evolved photoreceptors in which the reactivity of a chromophore is enhanced by its molecular environment to achieve high quantum yields. The retinal chromophore sterically constrained inside rhodopsin proteins represents an outstanding example of such a control. In a more general framework, mechanical forces acting on a molecular system can strongly modify its reactivity. Herein, we show that the exertion of tensile forces on a simplified retinal chromophore model provokes a substantial and regular increase in the trans-to-cis photoisomerization quantum yield in a counter-intuitive way, as these extension forces facilitate the formation of the more compressed cis photoisomer. A rationale for the mechanochemical effect on this photoisomerization mechanism is also proposed.

  • 50. Vögeli, Beat
    et al.
    Bibow, Stefan
    Chi N, Celestine
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. ETH.
    Enzyme Selectivity Fine-Tuned through Dynamic Control of a Loop.2016In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 55, no 9, p. 3096-100Article in journal (Refereed)
    Abstract [en]

    Allostery has been revealed as an essential property of all proteins. For enzymes, shifting of the structural equilibrium distribution at one site can have substantial impacts on protein dynamics and selectivity. Promising sites of remotely shifting such a distribution by changing the dynamics would be at flexible loops because relatively large changes may be achieved with minimal modification of the protein. A ligand-selective change of binding affinity to the active site of cyclophilin is presented involving tuning of the dynamics of a highly flexible loop. Binding affinity is increased upon substitution of double Gly to Ala at the hinge regions of the loop. Quenching of the motional amplitudes of the loop slightly rearranges the active site. In particular, key residues for binding Phe60 and His126 adopt a more fixed orientation in the bound protein. Our system may serve as a model system for studying the effects of various time scales of loop motion on protein function tuned by mutations.

12 1 - 50 of 58
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