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J Antibiot (Tokyo) ; 71(2): 273-278, 2018 02.
Article in English | MEDLINE | ID: mdl-29184120

ABSTRACT

Two new analogs of halistanol sulfate (1) were isolated from a marine sponge Halichondria sp. collected at Hachijo-jima Island. Structures of these new halistanol sulfates I (2) and J (3) were elucidated by spectral analyses. Compounds 1-3 showed inhibitory activity against SIRT 1-3 with IC50 ranges of 45.9-67.9, 18.9-21.1 and 21.8-37.5 µM, respectively. X-ray crystallography of the halistanol sulfate (1) and SIRT3 complex clearly indicates that 1 binds to the exosite of SIRT3 that we have discovered in this study.


Subject(s)
Porifera/chemistry , Sirtuins/antagonists & inhibitors , Sterols/isolation & purification , Sterols/pharmacology , Animals , Antineoplastic Agents/isolation & purification , Antineoplastic Agents/pharmacology , Crystallography, X-Ray , Drug Screening Assays, Antitumor , HeLa Cells , Humans , Magnetic Resonance Spectroscopy , Models, Molecular , Molecular Structure , Sirtuin 1/antagonists & inhibitors , Sirtuin 2/antagonists & inhibitors , Sirtuin 3/antagonists & inhibitors , Spectrometry, Mass, Electrospray Ionization , Spectrophotometry, Ultraviolet
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