PGC-1 alpha: a transcriptional coactivator for steroid receptors and nuclear receptors. Greatly increases the transcriptional activity of PPARG and thyroid hormone receptor genes. Interacts with, and regulates the activities of, cAMP response element binding protein (CREB) and nuclear respiratory factors (NRFs). Regulates many genes involved in energy metabolism. Provides a direct link between external physiological stimuli and the regulation of mitochondrial biogenesis, and is a major factor that regulates muscle fiber type determination. Plays an essential role in metabolic reprogramming in response to dietary availability through coordination of the expression of a wide array of genes involved in glucose and fatty acid metabolism. May be involved in controlling blood pressure, regulating cellular cholesterol homoeostasis, and the development of obesity. Its transcription is repressed by ZNF746 which binds to 'insulin response sequences' in its promoter. Heavily acetylated by GCN5 and biologically inactive under conditions of high nutrients. Deacetylated by SIRT1 in low nutrients/high NAD conditions.
Protein type: Nuclear receptor co-regulator; Transcription, coactivator/corepressor
Chromosomal Location of Human Ortholog: 4p15.1
Cellular Component: cell soma; DNA-directed RNA polymerase II, core complex; nucleoplasm; nucleus; PML body
Molecular Function: alpha-tubulin binding; androgen receptor binding; chromatin DNA binding; DNA binding; estrogen receptor binding; ligand-dependent nuclear receptor binding; ligand-dependent nuclear receptor transcription coactivator activity; nucleotide binding; peroxisome proliferator activated receptor binding; protein binding; RNA binding; sequence-specific DNA binding; transcription coactivator activity; transcription factor binding; ubiquitin protein ligase binding
Biological Process: aging; androgen metabolic process; androgen receptor signaling pathway; brown fat cell differentiation; cell glucose homeostasis; cellular respiration; cerebellum development; circadian regulation of gene expression; circadian rhythm; digestion; fatty acid oxidation; flavone metabolic process; forebrain development; galactose metabolic process; gluconeogenesis; mitochondrion degradation; mitochondrion organization and biogenesis; mRNA processing; negative regulation of glycolysis; negative regulation of neuron apoptosis; negative regulation of protein amino acid phosphorylation; negative regulation of smooth muscle cell migration; negative regulation of smooth muscle cell proliferation; organelle organization and biogenesis; positive regulation of fatty acid oxidation; positive regulation of gluconeogenesis; positive regulation of histone acetylation; positive regulation of smooth muscle cell proliferation; positive regulation of transcription factor activity; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription from RNA polymerase II promoter by pheromones; positive regulation of transcription, DNA-dependent; protein complex assembly; protein stabilization; regulation of circadian rhythm; regulation of transcription, DNA-dependent; response to cold; response to dietary excess; response to electrical stimulus involved in regulation of muscle adaptation; response to leucine; response to muscle activity; response to reactive oxygen species; response to starvation; RNA splicing; skeletal muscle atrophy; thermoregulation; transcription initiation from RNA polymerase II promoter
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