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Nat Prod Res. 2018 Nov;32(21):2583-2588. doi: 10.1080/14786419.2018.1428595. Epub 2018 Jan 22.

One new indolocarbazole alkaloid from the Streptomyces sp. A22.

Author information

1
a College of Chemical Engineering , Zhejiang University of Technology , Hangzhou , China.
2
b Zhejiang Police College , Hangzhou , China.
3
c Institute of Marine Biology , Ocean College, Zhejiang University , Zhoushan , China.

Abstract

One new indolocarbazole alkaloid, 12-N-methyl-k252c, together with eight known indolocarbazoles were isolated from the rice solid fermentation of the marine-derived Streptomyces sp. A22. Their structures were elucidated on the basis of spectroscopic methods (UV, IR, HRESITOF MS, 1D NMR and 2D NMR). All of these compounds were evaluated for bromodomain-containing protein 4 (BRD4) inhibitory activities and cytotoxic activity assay, respectively. Compounds 4 and 5 showed moderate cytotoxic activity with an IC50 value of 3.52 and 3.93 μM, respectively. Additionally, compound 1 also was tested for enzyme inhibition activities of protein kinases and showed moderate activity with IC50 values of 0.91-1.84 μM.

KEYWORDS:

12-N-methyl-k252c; Indolocarbazoles; enzyme inhibition activity

PMID:
29355042
DOI:
10.1080/14786419.2018.1428595
[Indexed for MEDLINE]

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