NP_000600.1
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NCBI GenBank Nucleotide #
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UniProt Primary Accession #
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UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
11,004 Da
NCBI Official Full Name
stromal cell-derived factor 1 isoform beta
NCBI Official Synonym Full Names
chemokine (C-X-C motif) ligand 12
NCBI Official Synonym Symbols
IRH; PBSF; SDF1; TLSF; TPAR1; SCYB12 [Similar Products]
NCBI Protein Information
stromal cell-derived factor 1; intercrine reduced in hepatomas; pre-B cell growth-stimulating factor
UniProt Protein Name
Stromal cell-derived factor 1
UniProt Synonym Protein Names
C-X-C motif chemokine 12; Intercrine reduced in hepatomas; IRH; hIRH; Pre-B cell growth-stimulating factor; PBSF
UniProt Synonym Gene Names
UniProt Entry Name
SDF1_HUMAN
NCBI Summary for SDF 1a
This antimicrobial gene encodes a stromal cell-derived alpha chemokine member of the intercrine family. The encoded protein functions as the ligand for the G-protein coupled receptor, chemokine (C-X-C motif) receptor 4, and plays a role in many diverse cellular functions, including embryogenesis, immune surveillance, inflammation response, tissue homeostasis, and tumor growth and metastasis. Mutations in this gene are associated with resistance to human immunodeficiency virus type 1 infections. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2014]
UniProt Comments for SDF 1a
CXCL12: Chemoattractant active on T-lymphocytes, monocytes, but not neutrophils. Activates the C-X-C chemokine receptor CXCR4 to induce a rapid and transient rise in the level of intracellular calcium ions and chemotaxis. Also binds to another C-X-C chemokine receptor CXCR7, which activates the beta-arrestin pathway and acts as a scavenger receptor for SDF-1. SDF-1-beta(3-72) and SDF-1- alpha(3-67) show a reduced chemotactic activity. Binding to cell surface proteoglycans seems to inhibit formation of SDF-1-alpha(3- 67) and thus to preserve activity on local sites. Acts as a positive regulator of monocyte migration and a negative regulator of monocyte adhesion via the LYN kinase. Stimulates migration of monocytes and T-lymphocytes through its receptors, CXCR4 and CXCR7, and decreases monocyte adherence to surfaces coated with ICAM-1, a ligand for beta-2 integrins. SDF1A/CXCR4 signaling axis inhibits beta-2 integrin LFA-1 mediated adhesion of monocytes to ICAM-1 through LYN kinase. Inhibits CXCR4-mediated infection by T- cell line-adapted HIV-1. Plays a protective role after myocardial infarction. Induces down-regulation and internalization of CXCR7 expressed in various cells. Has several critical functions during embryonic development; required for B-cell lymphopoiesis, myelopoiesis in bone marrow and heart ventricular septum formation. Monomer or homodimer; in equilibrium. Dimer formation is induced by non acidic pH and the presence of multivalent anions, and by binding to CXCR4 or heparin. Monomeric form is required for full chemotactic activity and resistance to ischemia/reperfusion injury, whereas the dimeric form acts as a partial agonist of CXCR4, stimulating Ca2+ mobilization but with no chemotactic activity and instead acts as a selective antagonist that blocks chemotaxis induced by the monomeric form. Interacts with the N- terminus of CXCR7. Isoform Alpha and isoform Beta are ubiquitously expressed, with highest levels detected in liver, pancreas and spleen. Isoform Gamma is mainly expressed in heart, with weak expression detected in several other tissues. Isoform Delta, isoform Epsilon and isoform Theta have highest expression levels in pancreas, with lower levels detected in heart, kidney, liver and spleen. Belongs to the intercrine alpha (chemokine CxC) family. 6 isoforms of the human protein are produced by alternative splicing.
Protein type: Secreted; Secreted, signal peptide; Motility/polarity/chemotaxis; Chemokine; Cell development/differentiation
Chromosomal Location of Human Ortholog: 10q11.1
Cellular Component: extracellular space; extracellular region; external side of plasma membrane
Molecular Function: growth factor activity; chemokine activity; chemokine receptor binding; CXCR chemokine receptor binding; receptor binding
Biological Process: positive regulation of dopamine secretion; response to peptide hormone stimulus; positive regulation of cell adhesion; blood circulation; adult locomotory behavior; neuron migration; motor axon guidance; signal transduction; chemotaxis; germ cell development; induction of positive chemotaxis; T cell proliferation; response to radiation; germ cell migration; cell adhesion; organ regeneration; regulation of actin polymerization and/or depolymerization; response to virus; patterning of blood vessels; cellular calcium ion homeostasis; G-protein coupled receptor protein signaling pathway; response to heat; response to mechanical stimulus; ameboidal cell migration; positive regulation of axon extension involved in axon guidance; response to hypoxia; positive regulation of endothelial cell proliferation; immune response; telencephalon cell migration
Disease: Human Immunodeficiency Virus Type 1, Susceptibility To
Research Articles on SDF 1a
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Products associated with SDF 1a active protein
Pathways associated with SDF 1a active protein
Diseases associated with SDF 1a active protein
Organs/Tissues associated with SDF 1a active protein
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