Secondary Regulatory Sites in Rat Liver Cholesterol Biosynthesis: Role of 5-pyrophosphomevalonate Decarboxylase

Overview

Journal Lipids

Specialty Biochemistry

Date 1980 Mar 1

PMID 7374372

Citations 8

Authors

A M Jabalquinto

E CARDEMIL

Affiliations

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Abstract

The activity of 5-pyrophosphomevalonate decarboxylase in 43,000 g supernatant fractions from livers and kidneys of male adult rats has been determined. Enzyme activity in liver is significantly increased when rats are fed a diet containing 3% cholestyramine (268% of control rats) and decreased when fed a diet containing 2% cholesterol (25% of control rats). No circadian rhythm of enzyme activity is found in liver or kidneys. These results show that variations in hepatic cholesterogenesis affect the activity of 5-pyrophosphomevalonate decarboxylase in a similar way as other enzymes involved in the biosynthesis of cholesterol.

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