Biogenesis of 3-hydroxy-3-methylglutaryl-coenzyme A reductase, an integral glycoprotein of the endoplasmic reticulum.
- 1 March 1984
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 81 (6) , 1674-1678
- https://doi.org/10.1073/pnas.81.6.1674
Abstract
Using a cell line, C100, that overproduces 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMG-CoA reductase; EC 1.1.1.34) 100-fold, we have studied the synthesis and insertion of this protein into the endoplasmic reticulum. The enzyme is synthesized on membrane-bound polysomes. It is cotranslationally but not post-translationally inserted into dog pancreatic microsomes. This cotranslational insertion is dependent upon signal recognition particle. HMG-CoA reductase is glycosylated with an oligosaccharide(s) of the "high-mannose" type sensitive to endo-beta-D-N-acetylglucosaminidase H. Partial determination of the NH2-terminal amino acid sequence of the in vitro translation product and the mature polypeptide indicate they are the same and demonstrate there is no cleavage of an NH2-terminal signal sequence.This publication has 30 references indexed in Scilit:
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