Nutrient-dependent Regulation of PGC-1alpha's Acetylation State and Metabolic Function Through the Enzymatic Activities of Sirt1/GCN5

Overview

Journal Biochim Biophys Acta

Specialties Biochemistry
Biophysics

Date 2009 Dec 17

PMID 20005308

Citations 97

Authors

John E Dominy Jr

Yoonjin Lee

Zachary Gerhart-Hines

Pere Puigserver

Affiliations

Soon will be listed here.

Abstract

Mammals possess an intricate regulatory system for controlling flux through fuel utilization pathways in response to the dietary availability of particular macronutrients. Under fasting conditions, for instance, mammals initiate a whole body metabolic response that limits glucose utilization and favors fatty acid oxidation. Understanding the underlying mechanisms by which this process occurs will facilitate the development of new treatments for metabolic disorders such as type II diabetes and obesity. One of the recently identified components of the signal transduction pathway involved in metabolic reprogramming is PGC-1alpha. This transcriptional coactivator is able to coordinate the expression of a wide array of genes involved in glucose and fatty acid metabolism. The nutrient-mediated control of PGC-1alpha activity is tightly correlated with its acetylation state. In this review, we evaluate how the nutrient regulation of PGC-1alpha activity squares with the regulation of its acetylation state by the deacetylase Sirt1 and the acetyltransferase GCN5. We also propose an outline of additional experimental directives that will help to shed additional light on this very powerful transcriptional coactivator.

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