LPIN1: Plays important roles in controlling the metabolism of fatty acids at differents levels. Acts as a magnesium-dependent phosphatidate phosphatase enzyme which catalyzes the conversion of phosphatidic acid to diacylglycerol during triglyceride, phosphatidylcholine and phosphatidylethanolamine biosynthesis in the reticulum endoplasmic membrane. Acts also as a nuclear transcriptional coactivator for PPARGC1A/PPARA to modulate lipid metabolism gene expression. Is involved in adipocyte differentiation. May also be involved in mitochondrial fission by converting phosphatidic acid to diacylglycerol. Interacts (via LXXIL motif) with PPARA. Interacts with PPARGC1A. Interaction with PPARA and PPARGC1A leads to the formation of a complex that modulates gene transcription. Interacts with MEF2C. Specifically expressed in skeletal muscle. Also abundant in adipose tissue. Lower levels in some portions of the digestive tract. Inhibited by N-ethylmaleimide. Belongs to the lipin family.
Protein type: EC 3.1.3.4; Phosphatase, lipid
Cellular Component: mitochondrial outer membrane; transcription factor complex; nuclear membrane; mitochondrion; membrane; endoplasmic reticulum; cytoplasm; nucleus
Molecular Function: protein binding; peroxisome proliferator activated receptor binding; hydrolase activity; phosphatidate phosphatase activity; histone deacetylase binding; transcription coactivator activity
Biological Process: fat cell differentiation; mitochondrial fission; transcription, DNA-dependent; regulation of fat cell differentiation; triacylglycerol biosynthetic process; fatty acid catabolic process; negative regulation of transcription from RNA polymerase II promoter; regulation of transcription from RNA polymerase II promoter; positive regulation of histone deacetylation; cellular response to insulin stimulus; regulation of transcription, DNA-dependent; dephosphorylation; actin cytoskeleton reorganization; ruffle organization and biogenesis; positive regulation of transcription from RNA polymerase II promoter; lipid metabolic process; triacylglycerol mobilization
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