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Ligand Discovery for a Peptide-Binding GPCR by Structure-Based Screening of Fragment- and Lead-Like Chemical Libraries
Stockholm Univ, Dept Biochem & Biophys, Sci Life Lab, SE-10691 Stockholm, Sweden..
Univ Zurich, Dept Biochem, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
Stockholm Univ, Dept Biochem & Biophys, Sci Life Lab, SE-10691 Stockholm, Sweden..
Univ Zurich, Dept Biochem, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
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2017 (English)In: ACS Chemical Biology, ISSN 1554-8929, E-ISSN 1554-8937, Vol. 12, no 3, p. 735-745Article in journal (Refereed) Published
Abstract [en]

Peptide-recognizing G protein-coupled receptors (GPCRs) are promising therapeutic targets but often resist drug discovery efforts. Determination of crystal structures for peptide binding GPCRs has provided opportunities to explore structure based methods in lead development. Molecular docking screens of two chemical libraries, containing either fragment- or lead-like compounds, against a neurotensin receptor 1 crystal structure allowed for a comparison between different drug development strategies for peptide-binding GPCRs. A total of 2.3 million molecules were screened computationally, and 25 fragments and 27 leads that were top-ranked in each library were selected for experimental evaluation. Of these, eight fragments and five leads were confirmed as ligands by surface plasmon resonance. The hit rate for the fragment screen (32%) was thus higher than for the lead-like library (19%), but the affinities of the fragments were similar to 100-fold lower. Both screens returned unique scaffolds and demonstrated that a crystal structure of a stabilized peptide-binding GPCR can guide the discovery of small-molecule agonists. The complementary advantages of exploring fragment- and lead-like chemical space suggest that these strategies should be applied synergistically in structure-based screens against challenging GPCR targets.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2017. Vol. 12, no 3, p. 735-745
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Biochemistry and Molecular Biology
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URN: urn:nbn:se:uu:diva-320826DOI: 10.1021/acschembio.6b00646ISI: 000397077700018PubMedID: 28032980OAI: oai:DiVA.org:uu-320826DiVA, id: diva2:1091472
Funder
Swedish Research Council, 2013-05708Swedish Foundation for Strategic Research , ICA10-0098Science for Life Laboratory - a national resource center for high-throughput molecular bioscienceAvailable from: 2017-04-26 Created: 2017-04-26 Last updated: 2017-04-26Bibliographically approved

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Carlsson, Jens

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