FUNCTION: Catalyzes the phosphorylation of sphingosine to form sphingosine-1-phosphate (SPP), a lipid mediator with both intra- and extracellular functions. Also acts on D-erythro-dihydrosphingosine, D-erythro-sphingosine and L-threo-dihydrosphingosine. Binds phosphoinositides (PubMed:19168031, PubM...
FUNCTION: Catalyzes the phosphorylation of sphingosine to form sphingosine-1-phosphate (SPP), a lipid mediator with both intra- and extracellular functions. Also acts on D-erythro-dihydrosphingosine, D-erythro-sphingosine and L-threo-dihydrosphingosine. Binds phosphoinositides (PubMed:19168031, PubMed:12954646). In contrast to prosurvival SPHK1, has a positive effect on intracellular ceramide levels, inhibits cells growth and enhances apoptosis (PubMed:16118219). In mitochondria, is important for cytochrome-c oxidase assembly and mitochondrial respiration. The SPP produced in mitochondria binds PHB2 and modulates the regulation via PHB2 of complex IV assembly and respiration (PubMed:20959514). In nucleus, plays a role in epigenetic regulation of gene expression. Interacts with HDAC1 and HDAC2 and, through SPP production, inhibits their enzymatic activity, preventing the removal of acetyl groups from lysine residues with histones. Up-regulates acetylation of histone H3-K9, histone H4-K5 and histone H2B-K12 (PubMed:19729656). In nucleus, may have an inhibitory effect on DNA synthesis and cell cycle (PubMed:12954646, PubMed:16103110). In mast cells, is the main regulator of SPP production which mediates calcium influx, NF-kappa-B activation, cytokine production, such as TNF and IL6, and degranulation of mast cells (By similarity). In dopaminergic neurons, is involved in promoting mitochondrial functions regulating ATP and ROS levels (By similarity). Also involved in the regulation of glucose and lipid metabolism (By similarity). {ECO:0000250|UniProtKB:Q9JIA7, ECO:0000269|PubMed:12954646, ECO:0000269|PubMed:16103110, ECO:0000269|PubMed:16118219, ECO:0000269|PubMed:19168031, ECO:0000269|PubMed:19729656, ECO:0000269|PubMed:20959514}.
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GO - Biological processes (BP):
blood vessel development [GO:0001568]; brain development [GO:0007420]; cellular response to phorbol 13-acetate 12-myristate [GO:1904628]; epigenetic maintenance of chromatin in transcription-competent conformation [GO:0045815]; female pregnancy [GO:0007565]; histone H2A-K5 acetylation [GO:0043977]; ...
blood vessel development [GO:0001568]; brain development [GO:0007420]; cellular response to phorbol 13-acetate 12-myristate [GO:1904628]; epigenetic maintenance of chromatin in transcription-competent conformation [GO:0045815]; female pregnancy [GO:0007565]; histone H2A-K5 acetylation [GO:0043977]; histone H2B-K12 acetylation [GO:0043980]; negative regulation of cell growth [GO:0030308]; negative regulation of histone deacetylase activity [GO:1901726]; negative regulation of histone deacetylation [GO:0031064]; phosphorylation [GO:0016310]; positive regulation of apoptotic process [GO:0043065]; positive regulation of calcium ion import [GO:0090280]; positive regulation of cell population proliferation [GO:0008284]; positive regulation of ceramide biosynthetic process [GO:2000304]; positive regulation of cytokine production involved in immune response [GO:0002720]; positive regulation of histone H3-K9 acetylation [GO:2000617]; positive regulation of interleukin-13 production [GO:0032736]; positive regulation of interleukin-6 production [GO:0032755]; positive regulation of mast cell activation involved in immune response [GO:0033008]; positive regulation of mast cell degranulation [GO:0043306]; positive regulation of protein kinase C signaling [GO:0090037]; positive regulation of tumor necrosis factor production [GO:0032760]; regulation of ATP biosynthetic process [GO:2001169]; regulation of cytochrome-c oxidase activity [GO:1904959]; regulation of I-kappaB kinase/NF-kappaB signaling [GO:0043122]; regulation of reactive oxygen species biosynthetic process [GO:1903426]; sphinganine-1-phosphate biosynthetic process [GO:0006669]; sphingolipid biosynthetic process [GO:0030148]; sphingolipid metabolic process [GO:0006665]; sphingosine biosynthetic process [GO:0046512]; sphingosine metabolic process [GO:0006670]
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GO - Molecular function (MF):
ATP binding [GO:0005524]; D-erythro-sphingosine kinase activity [GO:0017050]; histone binding [GO:0042393]; lipid kinase activity [GO:0001727]; NAD+ kinase activity [GO:0003951]; small GTPase binding [GO:0031267]; sphinganine kinase activity [GO:0008481]; sphingosine-1-phosphate receptor activity [G...
ATP binding [GO:0005524]; D-erythro-sphingosine kinase activity [GO:0017050]; histone binding [GO:0042393]; lipid kinase activity [GO:0001727]; NAD+ kinase activity [GO:0003951]; small GTPase binding [GO:0031267]; sphinganine kinase activity [GO:0008481]; sphingosine-1-phosphate receptor activity [GO:0038036]
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GO - Cellular component (CC):
cytoplasm [GO:0005737]; cytosol [GO:0005829]; endoplasmic reticulum [GO:0005783]; intracellular membrane-bounded organelle [GO:0043231]; lysosomal membrane [GO:0005765]; membrane [GO:0016020]; mitochondrial inner membrane [GO:0005743]; mitochondrion [GO:0005739]; nucleoplasm [GO:0005654]; nucleosome...
cytoplasm [GO:0005737]; cytosol [GO:0005829]; endoplasmic reticulum [GO:0005783]; intracellular membrane-bounded organelle [GO:0043231]; lysosomal membrane [GO:0005765]; membrane [GO:0016020]; mitochondrial inner membrane [GO:0005743]; mitochondrion [GO:0005739]; nucleoplasm [GO:0005654]; nucleosome [GO:0000786]; nucleus [GO:0005634]
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