Motobamide, an Antitrypanosomal Cyclic Peptide from a Leptolyngbya sp. Marine Cyanobacterium

Hiroki Takahashi, Arihiro Iwasaki, Naoaki Kurisawa, Ryota Suzuki, Ghulam Jeelani, Teruhiko Matsubara, Toshinori Sato, Tomoyoshi Nozaki, Kiyotake Suenaga

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Motobamide (1), a new cyclic peptide containing a C-prenylated cyclotryptophan residue, was isolated from a marine Leptolyngbya sp. cyanobacterium. Its planar structure was established by spectroscopic and MS/MS analyses. The absolute configuration was elucidated based on a combination of chemical degradations, chiral-phase HPLC analyses, spectroscopic analyses, and computational chemistry. Motobamide (1) moderately inhibited the growth of bloodstream forms of Trypanosoma brucei rhodesiense (IC50 2.3 μM). However, it exhibited a weaker cytotoxicity against normal human cells (IC50 55 μM).

Original languageEnglish
Pages (from-to)1649-1655
Number of pages7
JournalJournal of Natural Products
Issue number5
Publication statusPublished - 2021 May 28

ASJC Scopus subject areas

  • Analytical Chemistry
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry


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