2m37
From Proteopedia
Structure of lasso peptide astexin-1
Structural highlights
FunctionASTX1_ASTEC Shows weak antimicrobial activity against its phylogenetic relative Caulobacter crescentus. Does not show activity against other bacteria tested (E.coli, Vibrio sp, Burkhoderia thailandensis, and Salmonella newport).[1] Publication Abstract from PubMedLasso peptides are a large family of natural products that owe their name to a unique structure formed by a side chain to backbone macrocyclization, resembling a knotted lasso. The unique structure has significant impact on their biological and physical properties, as lasso peptides are usually more stable than linear ones. Current work examines stability, structure, and biosynthesis of recently discovered lasso peptide astexin-1, a heat-sensitive lasso peptide. The obtained results revealed a new lasso structure with a tight loop and long tail as well as narrow specificity of the maturation machinery for some essential residues associated with the protease processing site, involved in macrolactam ring formation and entrapment of the tail. Using the astexin-1 structure, it was possible to rationally construct a thermostable variant of this lasso peptide. The astexin-1 lasso peptides: biosynthesis, stability, and structural studies.,Zimmermann M, Hegemann JD, Xie X, Marahiel MA Chem Biol. 2013 Apr 18;20(4):558-69. doi: 10.1016/j.chembiol.2013.03.013. PMID:23601645[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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