Stromal Cell Derived Factor 1alpha Active Protein | CXCL12 active protein

Stromal Cell Derived Factor 1alpha, Recombinant, Human (SDF1a)

Cat. Num. AAA650498

• Gene Names: CXCL12; IRH; PBSF; SDF1; TLSF; SDF1A; SDF1B; TPAR1; SCYB12
• Purity: Highly Purified; 98% by RP-HPLC and SDS-PAGE. Chromatographically purified.
• Synonyms: Stromal Cell Derived Factor 1alpha; Recombinant; Human (SDF1a); CXCL12 active protein

• Host: E Coli
• Purity/Purification: Highly Purified; 98% by RP-HPLC and SDS-PAGE. Chromatographically purified.
• Form/Format: Supplied as a lyophilized powder without additives.
• Sequence: The sequence of the first five N-terminal amino acids was determined and was found to be Lys-Pro-Val-Ser-Leu

• Biological Activity: The specific activity as determined by its ability to chemoattract human peripheral T cells activated with PHA and IL-2 using a concentation of 20-80ng/ml.
• Protein Content: Protein quantitation was carried out by two independent methods:; 1. UV spectroscopy at 280 nm using the absorbency value of 1.06 as the extinction coefficient for a 0.1% (1mg/ml) solution. This value is calculated by the PC GENE computer analysis program of protein sequences (IntelliGenetics).; 2. Analysis by RP-HPLC, using a standard solution of SDF-1 as a Reference Standard.
• Preparation and Storage: Lyophilized powder may be stored at -20 degree C. Stable for 12 months at -20 degree C. Reconstitute with sterile ddH2O. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Aliquot to avoid repeated freezing and thawing. Store at -20 degree C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

Related Product Information for CXCL12 active protein

Chemokine SDF-1 is highly conserved among species and belongs to a large family of small, structurally related cytokines. It is a chemoattractant for T lymphocytes, monocytes, and hemopoietic stem cells and is constitutively expressed in bone-marrow-derived stromal cells. Recent reports indicate that SDF-1 is the ligand for LESTR/fusin and prevents infection by T-cell-line-adapted HIV-1. SDF-1a and SDF-1b, are generated by alternative RNA splicing of transcripts encoded by a single gene. SDF-1a differs from SDF-1b by four C-terminal amino acid residues absent in SDF-1a. As yet, no functional differences have been reported.

Product Categories/Family for CXCL12 active protein

Growth Factors; Cytokines; Growth Factors-Cell Factors

NCBI and Uniprot Product Information

• NCBI GI #: 40316924
• NCBI GeneID: 6387
• NCBI Accession #: NP_954637.1
• NCBI GenBank Nucleotide #: NM_199168.3
• UniProt Accession #: Q6ICW0; P48061; Q2L985; Q2L986; Q2L988; Q8NF00
• Molecular Weight: 8.01kD
• NCBI Official Full Name: stromal cell-derived factor 1 isoform alpha
• NCBI Official Synonym Full Names: chemokine (C-X-C motif) ligand 12
• NCBI Official Symbol: CXCL12
• NCBI Official Synonym Symbols: IRH; PBSF; SDF1; TLSF; SDF1A; SDF1B; TPAR1; SCYB12
• NCBI Protein Information: stromal cell-derived factor 1; OTTHUMP00000019491; OTTHUMP00000019492; OTTHUMP00000216979; OTTHUMP00000216980; intercrine reduced in hepatomas; pre-B cell growth-stimulating factor
• UniProt Protein Name: CXCL12 protein
• Protein Family: Stromal cell-derived factor
• UniProt Gene Name: CXCL12
• UniProt Entry Name: Q6ICW0_HUMAN

NCBI Description

This gene encodes a stromal cell-derived alpha chemokine member of the intercrine family. This gene product and its receptor CXCR4 can activate lymphocytes and have been implicated in the metastasis of some cancers such as breast cancer. 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.

Uniprot Description

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, signal peptide; Chemokine; Motility/polarity/chemotaxis; Cell development/differentiation; Secreted

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: response to peptide hormone stimulus; positive regulation of dopamine secretion; positive regulation of cell adhesion; blood circulation; adult locomotory behavior; neuron migration; motor axon guidance; chemotaxis; signal transduction; induction of positive chemotaxis; germ cell development; T cell proliferation; response to radiation; germ cell migration; cell adhesion; organ regeneration; regulation of actin polymerization and/or depolymerization; response to virus; cellular calcium ion homeostasis; patterning of blood vessels; G-protein coupled receptor protein signaling pathway; response to heat; response to mechanical stimulus; ameboidal cell migration; response to hypoxia; positive regulation of axon extension involved in axon guidance; immune response; positive regulation of endothelial cell proliferation; telencephalon cell migration

Disease: Human Immunodeficiency Virus Type 1, Susceptibility To