Relationship of the structure and biological activity of the natural homologues of tunicamycin - PubMed (original) (raw)

. 1982 Mar 25;257(6):3105-9.

Free article

Relationship of the structure and biological activity of the natural homologues of tunicamycin

D Duksin et al. J Biol Chem. 1982.

Free article

Abstract

The antibiotic tunicamycin was separated into 16 different components using reversed-phase high performance liquid chromatography. The effect of the eight major tunicamycin homologues on protein glycosylation and protein biosynthesis was examined. All homologues tested inhibited lipid-mediated protein glycosylation in chick or mouse fibroblasts. These homologues also inhibited the transfer of N-acetylglucosamine-1-phosphate from UDP-N-acetylglucosamine to dolichyl phosphate in chick liver microsome preparations, whereas the transfer of mannose from GDP-mannose to the lipid acceptor was hardly affected. The inhibition of protein glycosylation in fibroblasts or in microsomal preparations was concentration-dependent and maximum inhibition occurred at different concentrations for different homologues. The eight homologues differed in their ability to cause inhibition of protein synthesis.

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