Meroterpenoids produced by Pseudocosmospora sp. Bm-1-1 isolated from Acanthus ebracteatus Vahl

Tomoki Nakamura, Takuma Suzuki, Nanang Rudianto Ariefta, Takuya Koseki, Takako Aboshi, Tetsuya Murayama, Ari Widiyantoro, Rikhsan Kurniatuhadi, Abdul Malik, Suwardi Annas, Desi Harneti, Rani Maharani, Unang Supratman, Junpei Abe, Naoaki Kurisawa, Ken ich Kimura, Yoshihito Shiono

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Fractionation of ethyl acetate extract obtained by culturing the endophytic fungus Pseudocosmospora sp. Bm-1-1 resulted in the isolation of four new meroterpenoids, cosmosporin A (1), 6-carboxy-cosmosporin A (2), rel-(6aS,10aR)-Δ 9 -tetrahydrocannabiorcolic acid B (3) and 8′-hydroxy-cannabiorcichromenic acid (4), in addition to four known compounds 5–8. Structures were elucidated by spectral analysis, as well as by directly comparing the spectral data of new compounds with those of known compounds. Cannabiorcichromenic acid (5), decarboxy-cannabiorcichromenic acid (6), and rel-(6aS,10aR)-decarboxy-Δ 9 -tetrahydrocannabiorcolic acid B (8) restored growth of a Saccharomyces cerevisiae mutant strain involving Ca 2+ signal transduction. Furthermore, compounds 3 and 8 had cytotoxic activity against HL60 cells (3: IC 50 = 24.1 μM and 8: IC 50 1.6 μM).

Original languageEnglish
Pages (from-to)85-91
Number of pages7
JournalPhytochemistry Letters
Publication statusPublished - 2019 Jun
Externally publishedYes


  • Ca ignaling
  • Cytotoxicity
  • Endophyte
  • Pseudocosmospora sp. Bm-1-1

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Agronomy and Crop Science
  • Plant Science


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