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HMGCR

HMG-CoA reductase is the rate-limiting enzyme for cholesterol synthesis and is regulated via a negative feedback mechanism mediated by sterols and non-sterol metabolites derived from mevalonate, the product of the reaction catalyzed by reductase. Normally in mammalian cells this enzyme is suppressed by cholesterol derived from the internalization and degradation of low density lipoprotein (LDL) via the LDL receptor. Competitive inhibitors of the reductase induce the expression of LDL receptors in the liver, which in turn increases the catabolism of plasma LDL and lowers the plasma concentration of cholesterol, an important determinant of atherosclerosis. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2008]
HMGCR
Protein class

Enzymes, FDA approved drug targets, Metabolic proteins, Plasma proteins, Transporters

Predicted location

Intracellular, Membrane (different isoforms)

Single cell type specificity

Cell type enhanced (Glandular and luminal cells, Theca cells)

Immune cell specificity

Low immune cell specificity

Cell line specificity

Low cell line specificity

Interaction

Homotetramer (PubMed:10698924). Homodimer (PubMed:10698924). Interacts (via its SSD) with INSIG1; the interaction, accelerated by sterols, leads to the recruitment of HMGCR to AMFR/gp78 for its ubiquitination by the sterol-mediated ERAD pathway (PubMed:12535518, PubMed:19458199). Interacts with UBIAD1 (PubMed:23169578).

Molecular function

Oxidoreductase

More Types Infomation

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For Research Use Only. Not For Clinical Use.

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