PGC-1, a versatile coactivator.
PGC-1 was originally identified as a transcriptional coactivator of the nuclear receptor PPARgamma. The expression pattern and induction by exposure to cold have implicated PGC-1 in the regulation of energy metabolism and adaptive thermogenesis. Remarkably, PGC-1 overexpression can induce mitochondrial biogenesis and functions. Recent studies show that PGC-1 regulates the activity of several nuclear receptors and other transcription factors, and thus acts in a broader context than previously anticipated. Furthermore, PGC-1 displays the striking ability to interact with components of the splicing machinery. PGC-1 could therefore allow coordinated regulation of transcription and splicing in response to signals relaying metabolic needs. These novel findings are discussed in the context of the proposed physiological functions of PGC-1.
Knutti
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Division of Biochemistry, Biozentrum of the University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland.
Kralli
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D000818:Animals; D004268:DNA-Binding Proteins; D004734:Energy Metabolism; D005786:Gene Expression Regulation; D012326:RNA Splicing; D018160:Receptors, Cytoplasmic and Nuclear / Q000502:physiology; D022722:Thermogenesis; D014157:Transcription Factors / Q000235:genetics / Q000502:physiology*
D004268:DNA-Binding Proteins; D018160:Receptors, Cytoplasmic and Nuclear; D014157:Transcription Factors; C111264:peroxisome-proliferator-activated receptor-gamma coactivator-1