New Sulfur-Containing Diketopiperazine from Marine-Derived Bacteria Streptomyces rochei sp. 81 with Potent Carbonic Anhydrase II Inhibition

Ahmed N. Al-Rawahi, Raeid M.M. Abed, Najeeb Ur Rehman*, Kashif Rafiq, Ajmal Khan, Abdul L. Khan, Majid Khan, Sobia Ahsan Halim, Fahad Al-Senafi, Huda Mahmoud, Ahmed Al-Harrasi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The ethyl acetate extract of the marine bacterial strain Streptomyces rochei sp. 81 was purified by silica gel column chromatography to obtain three diketopiperazines (1–3) and one straight chain fatty acid (4). The compounds were identified as cyclo(L-leu-N-ethenethiol-L-pro) (1), cyclo(L-Leu-L-Pro) (2), cyclo(L-Pro-D-Tyr) (3), and 2,4-dimethyldocasonoic acid (4) by HR-ESI-MS and NMR techniques. One new (1) and three known compounds (2–4) were screened for carbonic anhydrase-II (CA-II) inhibition and as a result 1 and 3 were found to be the most active compounds with IC50 of 9.8 ± 0.56 and 10.9 ± 0.88 μM, respectively. The results indicated that these two compounds (1 and 3) can be promising candidates for anticancer drugs.

Original languageEnglish
Pages (from-to)346-350
Number of pages5
JournalChemistry of Natural Compounds
Volume59
Issue number2
DOIs
Publication statusPublished - Mar 1 2023
Externally publishedYes

Keywords

  • Streptomyces rochei sp.81
  • carbonic anhydrase II
  • diketopiperazines
  • fatty acid

ASJC Scopus subject areas

  • General Chemistry
  • General Biochemistry,Genetics and Molecular Biology
  • Plant Science

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