Vertirhodins A-F, C-Linked Pyrrolidine-Iminosugar-Containing Pyranonaphthoquinones from Streptomyces sp. B15-008

Org Lett. 2021 Feb 5;23(3):682-686. doi: 10.1021/acs.orglett.0c03825. Epub 2021 Jan 14.

Abstract

Six novel pyranonaphthoquinones, vertirhodins A-F (1-6), were discovered from a soil-derived Streptomyces sp. B15-008. Their chemical structures and absolute configurations were determined using nuclear magnetic resonance and comparison of experimental and theoretical electronic circular dichroism spectra. The vertirhodins feature an unusual C-8 N-methyl-2-pyrrolidinemethanol moiety, a 5,14-epoxide rarely seen in streptomyces-derived natural products, and a C-13 hydroxyl group that forms the semiquinone. A plausible ver biosynthetic gene cluster was identified through whole genome sequencing and provides insights into these features.

Publication types

  • Research Support, N.I.H., Intramural

MeSH terms

  • Biological Products / chemistry*
  • Circular Dichroism
  • Magnetic Resonance Spectroscopy
  • Molecular Structure
  • Multigene Family
  • Naphthoquinones / chemistry*
  • Naphthoquinones / isolation & purification
  • Pyrrolidines / chemistry*
  • Pyrrolidines / isolation & purification
  • Streptomyces / chemistry*

Substances

  • Biological Products
  • Naphthoquinones
  • Pyrrolidines