Logo: to the web site of Uppsala University

uu.sePublications from Uppsala University
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Tropical vibes from Sri Lanka - cyclotides from Viola betonicifolia by transcriptome and mass spectrometry analysis
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences. Univ Colombo, Fac Sci, Dept Chem, Thurston Rd, Colombo 03, Sri Lanka.. (Farmakognosi)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences. Polish Acad Sci, W Szafer Inst Bot, 46 Lubicz St, PL-31512 Krakow, Poland.. (Farmakognosi)
Univ Colombo, Fac Sci, Dept Chem, Thurston Rd, Colombo 03, Sri Lanka..
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences. (Farmakognosi)ORCID iD: 0000-0001-9070-6944
Show others and affiliations
2021 (English)In: Phytochemistry, ISSN 0031-9422, E-ISSN 1873-3700, Vol. 187, article id 112749Article in journal (Refereed) Published
Abstract [en]

Cyclotides are an extremely stable class of peptides, ubiquitously distributed in Violaceae. The aim of the present study was to investigate the presence of cyclotides in Sri Lankan Violaceae plants, using combined tools of transcriptomics and mass spectrometry. New cyclotides were discovered for the first time in the wild flora of Sri Lanka, within Viola betonicifolia, a plant used in traditional medicine as an antimicrobial. Plant extracts prepared in small scale from Viola betonicifolia were first subjected to LC-MS analysis. Subsequent transcriptome de novo sequencing of Viola betonicifolia uncovered 25 new (vibe 1-25) and three known (varv A/kalata S, viba 17, viba 11) peptide sequences from Mobius and bracelet cyclotide subfamilies as well as hybrid cyclotides. Among the transcripts, putative linear acyclotide sequences (vibe 4, vibe 10, vibe 11 and vibe 22) that lack a conserved asparagine or aspartic acid vital for cyclisation were also present. Four asparagine endopeptidases (AEPs), VbAEP1-4 were found within the Viola betonicifolia transcriptome, including a peptide asparaginyl ligase (PAL), potentially involved in cyclotide backbone cyclisation, showing >93% sequence homology to Viola yedoensis peptide asparaginyl ligases, VyPALs. In addition, we identified two protein disulfide isomerases (PDIs), VbPDI1-2, likely involved in cyclotide oxidative folding, having high sequence homology (>74%) with previously reported Rubiaceae and Violaceae PDIs. The current study highlights the ubiquity of cyclotides in Violaceae as well as the utility of transcriptomic analysis for cyclotides and their putative processing enzyme discovery. The high variability of cyclotide sequences in terms of loop sizes and residues in V. betonicifolia showcase the cyclotide structure as an adaptable scaffold as well as their importance as a combinatorial library, implicated in plant defense.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD Elsevier, 2021. Vol. 187, article id 112749
Keywords [en]
Viola betonicifolia, Violaceae, Cyclotides, LC-MS, Transcriptome de novo sequencing, Cyclisation enzyme, Protein disulfide isomerase
National Category
Pharmaceutical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-445421DOI: 10.1016/j.phytochem.2021.112749ISI: 000654130400008PubMedID: 33932786OAI: oai:DiVA.org:uu-445421DiVA, id: diva2:1565843
Funder
Swedish Research Council, 2013-06672Available from: 2021-06-14 Created: 2021-06-14 Last updated: 2024-01-15Bibliographically approved

Open Access in DiVA

fulltext(16037 kB)676 downloads
File information
File name FULLTEXT01.pdfFile size 16037 kBChecksum SHA-512
b92753abb0d7cc698211921615de5699b5d787bef26ae2ae6d1f8c0f4783faab6b645c3986508fde1db6198e107ac65e21e2f31fd3bf56358ff3c196632bed3a
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMed

Authority records

Slazak, BlazejStrömstedt, Adam A.Göransson, UlfGunasekera, Sunithi

Search in DiVA

By author/editor
Slazak, BlazejStrömstedt, Adam A.Göransson, UlfGunasekera, Sunithi
By organisation
Department of Pharmaceutical Biosciences
In the same journal
Phytochemistry
Pharmaceutical Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 676 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 210 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf