Polyketides with antimicrobial activities from Penicillium canescens DJJ-1

Phytochemistry. 2023 Feb:206:113554. doi: 10.1016/j.phytochem.2022.113554. Epub 2022 Dec 7.

Abstract

Two undescribed polyketides canecines A-B, one unreported cyclopentenone canecine C, together with 12 known compounds were isolated from an extract of the fungus Penicillium canescens DJJ-1. Their structures were elucidated by detailed analysis of spectroscopic data, NMR calculations with dJ-DP4 or DP4+, and their absolute configurations were further determined by quantum chemical calculations of ECD spectra or X-crystallography. Canecine A was a grisan polyketide featuring a dimethyltetrahydro-4H-furo[2,3-b]pyran. Canecine A exhibited significant inhibitory activity against Candida albicans with an MIC value of 1 μg/mL and showed inhibitory effect on nitric oxide production in LPS-activated RAW264.7 macrophages. These results enrich the structural diversities of polyketides from endophytic fungi.

Keywords: Antimicrobial activity; Canecine; J-DP4; Penicillium canescens; Trichocomaceae.

MeSH terms

  • Anti-Infective Agents*
  • Magnetic Resonance Spectroscopy
  • Molecular Structure
  • Penicillium* / chemistry
  • Polyketides* / chemistry

Substances

  • Polyketides
  • Anti-Infective Agents

Supplementary concepts

  • Penicillium canescens