Sphingosine kinase 1 is an enzyme that in humans is encoded by the SPHK1 gene.^[5][6]

Quick Facts SPHK1, Available structures ...

SPHK1
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 3VZB, 3VZC, 3VZD, 4L02, 4V24
Identifiers
Aliases	SPHK1, SPHK, sphingosine kinase 1, SK1
External IDs	OMIM: 603730 MGI: 1316649 HomoloGene: 39748 GeneCards: SPHK1
Gene location (Human) Chr. Chromosome 17 (human)[1] Band 17q25.1 Start 76,376,584 bp[1] End 76,387,860 bp[1]
Gene location (Mouse) Chr. Chromosome 11 (mouse)[2] Band 11|11 E2 Start 116,421,751 bp[2] End 116,427,501 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in stromal cell of endometrium tibial nerve sural nerve minor salivary glands gastric mucosa monocyte upper lobe of left lung right lung left uterine tube gallbladder Top expressed in lip saccule left lung lobe skin of back skin of abdomen utricle right lung lobe optic nerve calvaria body of femur More reference expression data BioGPS More reference expression data
Gene ontology Molecular function sphingosine-1-phosphate receptor activity transferase activity nucleotide binding DNA binding calmodulin binding kinase activity protein binding protein phosphatase 2A binding ATP binding magnesium ion binding sphinganine kinase activity D-erythro-sphingosine kinase activity NAD+ kinase activity lipid binding acetyltransferase activity Cellular component cytoplasm membrane plasma membrane nucleus cytosol clathrin-coated pit endocytic vesicle early endosome membrane presynapse endosome endosome membrane cell junction synapse Biological process intracellular signal transduction positive regulation of fibroblast proliferation sphingosine metabolic process regulation of tumor necrosis factor-mediated signaling pathway sphingosine biosynthetic process positive regulation of mitotic cell cycle sphingolipid biosynthetic process positive regulation of angiogenesis positive regulation of cell growth brain development blood vessel development positive regulation of NF-kappaB transcription factor activity positive regulation of peptidyl-threonine phosphorylation protein folding positive regulation of cell population proliferation regulation of interleukin-1 beta production inflammatory response sphingoid catabolic process positive regulation of protein ubiquitination positive regulation of smooth muscle contraction calcium-mediated signaling signal transduction sphingosine-1-phosphate receptor signaling pathway lipid phosphorylation positive regulation of cell migration negative regulation of apoptotic process phosphorylation metabolism positive regulation of NIK/NF-kappaB signaling positive regulation of mitotic nuclear division cellular response to hydrogen peroxide DNA biosynthetic process sphingolipid mediated signaling pathway protein acetylation regulation of endocytosis positive regulation of interleukin-17 production response to tumor necrosis factor cellular response to vascular endothelial growth factor stimulus regulation of phagocytosis regulation of neuroinflammatory response negative regulation of ceramide biosynthetic process positive regulation of p38MAPK cascade regulation of microglial cell activation regulation of endosomal vesicle fusion Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 8877 20698 Ensembl ENSG00000176170 ENSMUSG00000061878 UniProt Q9NYA1 Q8CI15 RefSeq (mRNA) NM_001142601 NM_001142602 NM_021972 NM_182965 NM_001355139 NM_001172472 NM_001172473 NM_001172475 NM_011451 NM_025367 NM_001372484 NM_001372485 NM_001372486 NM_001372487 NM_001372488 NM_001372489 RefSeq (protein) NP_001136073 NP_001136074 NP_068807 NP_892010 NP_001342068 NP_001165943 NP_001165944 NP_001165946 NP_079643 NP_001359413 NP_001359414 NP_001359415 NP_001359416 NP_001359417 NP_001359418 Location (UCSC) Chr 17: 76.38 – 76.39 Mb Chr 11: 116.42 – 116.43 Mb PubMed search [3] [4]
Wikidata
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Sphingosine kinase 1 phosphorylates sphingosine to sphingosine-1-phosphate (S1P). SK1 is normally a cytosolic protein but is recruited to membranes rich in phosphatidate (PA), a product of phospholipase D (PLD).^[7]

Sphingosine-1-phosphate (S1P) is a novel lipid messenger with both intracellular and extracellular functions. Intracellularly, it regulates proliferation and survival, and extracellularly, it is a ligand for EDG1. Various stimuli increase cellular levels of S1P by activation of sphingosine kinase (SPHK), the enzyme that catalyzes the phosphorylation of sphingosine. Competitive inhibitors of SPHK block formation of S1P and selectively inhibit cellular proliferation induced by a variety of factors, including platelet-derived growth factor and serum.^[6]

SPHK1 has been shown to interact with TRAF2.^[8]