Protein: Phospholipid phosphatase 3 (EC 3.1.3.-) (EC 3.1.3.4) (Differentially expressed in rat intestine 42) (Dri42) (Lipid phosphate phosphohydrolase 3) (PAP2-beta) (Phosphatidate phosphohydrolase type 2b) (Phosphatidic acid phosphatase 2b) (PAP-2b) (PAP2b) (P97544)
Organism: Rattus norvegicus (Rat)
Function: Magnesium-independent phospholipid phosphatase of the plasma membrane that catalyzes the dephosphorylation of a variety of glycerolipid and sphingolipid phosphate esters including phosphatidate/PA, lysophosphatidate/LPA, diacylglycerol pyrophosphate/DGPP, sphingosine 1-phosphate/S1P and ceramide 1-phosphate/C1P. Also acts on N-oleoyl ethanolamine phosphate/N-(9Z-octadecenoyl)-ethanolamine phosphate, a potential physiological compound. Has both an extracellular and an intracellular phosphatase activity, allowing the hydrolysis and the cellular uptake of these bioactive lipid mediators from the milieu, regulating signal transduction in different cellular processes. Through the dephosphorylation of extracellular sphingosine-1-phosphate and the regulation of its extra- and intracellular availability, plays a role in vascular homeostasis, regulating endothelial cell migration, adhesion, survival, proliferation and the production of pro-inflammatory cytokines (By similarity). By maintaining the appropriate levels of this lipid in the cerebellum, also ensure its proper development and function (By similarity). Through its intracellular lipid phosphatase activity may act in early compartments of the secretory pathway, regulating the formation of Golgi to endoplasmic reticulum retrograde transport carriers (By similarity).
Subcellular location: Cell membrane {ECO:0000250|UniProtKB:O14495}; Multi-pass membrane protein {ECO:0000269|PubMed:8939937}. Basolateral cell membrane {ECO:0000250|UniProtKB:O14495}; Multi-pass membrane protein {ECO:0000269|PubMed:8939937}. Endoplasmic reticulum membrane {ECO:0000269|PubMed:8939937}; Multi-pass membrane protein {ECO:0000269|PubMed:8939937}. Endoplasmic reticulum-Golgi intermediate compartment membrane {ECO:0000250|UniProtKB:O14495}; Multi-pass membrane protein {ECO:0000269|PubMed:8939937}. Golgi apparatus membrane {ECO:0000250|UniProtKB:O14495}; Multi-pass membrane protein {ECO:0000269|PubMed:8939937}. Golgi apparatus, trans-Golgi network membrane {ECO:0000250|UniProtKB:O14495}; Multi-pass membrane protein {ECO:0000269|PubMed:8939937}. Membrane raft {ECO:0000250|UniProtKB:O14495}; Multi-pass membrane protein {ECO:0000269|PubMed:8939937}. Note=Cycles between the endoplasmic reticulum and the Golgi. {ECO:0000250|UniProtKB:O14495}.
Interaction partners:
- phosphatidate phosphatase
- phosphatidate phosphatase
- 1-acyl-sn-glycerol-3-phosphate acyltransferase
- Diacylglycerol O-acyltransferase 1
- phosphatidate phosphatase
- 1-acyl-sn-glycerol-3-phosphate acyltransferase
- RCG53912, isoform CRA_a.
- Sphingosine-1-phosphate lyase 1
- Diacylglycerol O-acyltransferase 2
- Sphingosine kinase 1
Sequence:
MQSYKYDKAIVPESKNGGSPALNNNPRKGGSKRVLLICLDLFCLFMAALPFLIIETSTIKPYRRGFYCNDESIKYPLKVSETINDAVLCAVGIVIAILRIITGEFYRIYYLKEKSRSTIQNPYVAALYKQVGCFLFGCAISQSFTDIAKVSIGRLRPHFLSVCDPDFSQINCSEGYIQNYRCRGEDSKVQEARKSFFSGHASFSMFTMLYLVLYLQARFTWRGARLLRPLLQFTLLMMAFYTGLSRVSDYKHHPSDVLAGFAQGALVACCIVFFVSDLFKTKTTLSLPAPAIRREILSPVDIMDRSNHHNMV