Xanthocidin Derivatives from the Endophytic Streptomyces sp. AcE210 Provide Insight into Xanthocidin Biosynthesis.
Chembiochem
; 19(23): 2472-2480, 2018 12 04.
Article
in En
| MEDLINE
| ID: mdl-30300957
ABSTRACT
Xanthocidin and six new derivatives were isolated from the endophytic Streptomyces sp. AcE210. Their planar structures were elucidated by 1D and 2D NMR spectroscopy as well as by HRMS. The absolute configuration of one compound was determined by using vibrational circular dichroism spectroscopy (VCD). The structural similarities of xanthocidin and some of the isolated xanthocidin congeners to the methylenomycins A, B, and C suggested that the biosynthesis of these compounds might follow a similar route. Feeding studies with isotopically labelled [13 C5 ]-l-valine showed that instead of utilizing acetyl-CoA as starter unit, which has been proposed for the methylenomycin biosynthesis, Streptomyces sp. AcE210 employs an isobutyryl-CoA starter unit, resulting in a branched side chain in xanthocidin. Further evidence for a comparable biosynthesis was given by the analysis of the genome sequence of Streptomyces sp. AcE210 that revealed a cluster of homologues to the mmy genes involved in methylenomycin biosynthesis.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cyclopentanes
/
Anti-Bacterial Agents
Language:
En
Journal:
Chembiochem
Journal subject:
BIOQUIMICA
Year:
2018
Document type:
Article
Affiliation country:
Germany