Frontiers in Microbiology (Feb 2024)

Bioactive polyketides and meroterpenoids from the mangrove-derived fungus Talaromyces flavus TGGP35

  • Jin Cai,
  • Jin Cai,
  • Xueming Zhou,
  • Xueming Zhou,
  • Bin Wang,
  • Bin Wang,
  • Xuelong Zhang,
  • Xuelong Zhang,
  • Mengyao Luo,
  • Mengyao Luo,
  • Longtao Huang,
  • Longtao Huang,
  • Ruoxi Wang,
  • Ruoxi Wang,
  • Yonghao Chen,
  • Yonghao Chen,
  • Xiaoyang Li,
  • Xiaoyang Li,
  • Youping Luo,
  • Youping Luo,
  • Guangying Chen,
  • Guangying Chen,
  • Fei Cao,
  • Guolei Huang,
  • Guolei Huang,
  • Caijuan Zheng,
  • Caijuan Zheng

DOI
https://doi.org/10.3389/fmicb.2024.1342843
Journal volume & issue
Vol. 15

Abstract

Read online

Six new polyketides, which includes three new lactones (talarotones A–C) (1–3), one new polyketide (talarotide A) (4), two new polyenes (talaroyenes A, B) (5, 6), together with one new meroterpenoid (talaropenoid A) (7) and 13 known compounds (8–20) were isolated from the mangrove-derived fungus Talaromyces flavus TGGP35. The structure and configuration of the compounds 1–7 were elucidated from the data obtained from HR-ESI-MS, IR, 1D/2D NMR spectroscopy, Mo2 (OAc)4-induced electronic circular dichroism (ECD), CD spectroscopy, and modified Mosher's method. Compounds 5 and 20 displayed antioxidant activity with IC50 values of 0.40 and 1.36 mM, respectively. Compounds 3, 6, 11, 16, and 17 displayed cytotoxic activity against human cancer cells Hela, A549, and had IC50 values ranging from 28.89 to 62.23 μM. Compounds 7, 10–12, and 14–18 exhibited moderate or potent anti-insect activity against newly hatched larvae of Helicoverpa armigera Hubner, with IC50 values in the range 50–200 μg/mL. Compound 18 showed antibacterial activity against Ralstonia solanacearum with the MIC value of 50 μg/mL.

Keywords