Chaxapeptin, a Lasso Peptide from Extremotolerant Streptomyces leeuwenhoekii Strain C58 from the Hyperarid Atacama Desert

Somayah S Elsayed, Franziska Trusch, Hai Deng, Andrea Raab, Ivan Prokes, Kanungnid Busarakam, Juan A. Asenjo, Barbara A. Andrews, Pieter van West, Alan T. Bull, Michael Goodfellow, Yu Yi, Rainer Ebel, Marcel Jaspars, Mostafa E. Rateb* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)


Lasso peptides are ribosomally synthesized and post-translationally modified peptides (RiPPs) that possess a unique "lariat knot" structural motif. Genome mining-targeted discovery of new natural products from microbes obtained from extreme environments has led to the identification of a gene cluster directing the biosynthesis of a new lasso peptide, designated as chaxapeptin 1, in the genome of Streptomyces leeuwenhoekii strain C58 isolated from the Atacama Desert. Subsequently, 1 was isolated and characterized using high-resolution electrospray ionization mass spectrometry and nuclear magnetic resonance methods. The lasso nature of 1 was confirmed by calculating its nuclear Overhauser effect restraint-based solution structure. Chaxapeptin 1 displayed a significant inhibitory activity in a cell invasion assay with human lung cancer cell line A549.

Original languageEnglish
Pages (from-to)10252-10260
Number of pages9
JournalJournal of Organic Chemistry
Issue number20
Early online date24 Sept 2015
Publication statusPublished - 16 Oct 2015

Bibliographical note

We thank the College of Physical Sciences, University of Aberdeen, for provision of infrastructure and facilities in the Marine Biodiscovery Centre. S.S.E. thanks the Egyptian Government for the Ph.D. scholarship. K.B. is grateful for a scholarship from the Thai Royal Government, A.T.B. for support from the Royal Society (International Joint Project Grant JP100654), and M.G. for an Emeritus Fellowship from the Leverhulme Trust. J.A.A., B.A.A., and A.T.B. thank Conicyt for the Basal Centre Grant for the CeBiB (Project FB0001). We are indebted to Dr. Byung-Yong Kim (ChunLab, Seoul, Korea) for conducting the fatty acid analyses. F.T. thanks Prof. Peter Bayer for technical advice.


  • Lasso peptides
  • Hyperarid Atacama Desert


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