Abstract
A new sulfolipid, KM043, which belongs to the 6-sulfo-alpha-D-quinovopyranosyl-(1-->3')-1',2'-diacylglycerol (SQDG) class of compounds, has been isolated from a marine red alga, Gigartina tenella, as a potent inhibitor of eukaryotic DNA polymerases and HIV-reverse transcriptase type 1. Its structure was determined on the basis of spectroscopic and gas chromatographic analyses. The inhibition was dose-dependent, and complete (more than 90%) inhibition of DNA polymerase alpha (pol. alpha), DNA polymerase beta (pol. beta) and HIV-reverse transcriptase type 1 (HIV-RT) was observed at concentrations of 5, 10, and 30 microM, respectively.
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