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ITGA4, Recombinant, Human, aa131

ITGA4, Recombinant, Human, aa131

Cat no: 149773

Supplier: United States Biological
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The integrin alpha 4 (also known as CD49d and ITGA4) belongs to the integrin alpha chain family of proteins. Integrins are heterodimeric integral membrane proteins composed of an alpha and beta chains. Alpha 4 chain associates with either beta 1 or beta 7 chain. It has been demonstrated that the putative ligand-binding sites of both integrin alpha 4 beta 1 and alpha 4 beta 7 is located on the alpha 4 chain. These ligands included Madcam, VCAM, and fibronectin. Madcam is known as the principal ligand for integrin alpha 4 beta 7. Recently it was also demonstrated that HIV-1 envelope can mimic Madcam by binding to and signaling though integrin alpha 4 beta 7, the gut mucosal homing receptor for peripheral T cells. This recombinant protein fragment includes the ligand and monoclonal antibody binding domains; this binding has been tested and verified in ELISA assays. This recombinant protein is recognized PSI antibodies Integrin 4 alpha (IN1) (PSI 4827) and Integrin 4 alpha (IN2) (PSI 4837), but not Integrin 4 alpha (CT) (PSI 4783). Source: Recombinant protein corresponding to human Integrin alpha 4, fused to His-tag at N-terminal expressed in E.coli. Molecular Weight: ~17kD Applications: Suitable for use in ELISA and Western Blot. Other applications not tested. Recommended Dilution: Optimal dilutions to be determined by the researcher. Storage and Stability: Aliquot to avoid repeated freezing and thawing and store at -70 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
Catalogue number: 149773
Size: 50ug
Form: Supplied as a liquid in 50mM Tris, pH 7.5,150mM sodium chloride, 5mM magnesium chloride.
Purity: ~95%
References: 1. Wegener KL and Campbell ID. Transmembrane and cytoplasmic domains in integrin activation and protein-protein interactions. Mol. Membr. Biol. 2008; 25:376-87. 2. Kamata T, Puzon W, and Takada Y. Identification of putative ligand-binding sites of the integrin alpha 4 beta 1 (VLA-4, CD49d/CD29). Biochem J. 1995; 305:945-51. 3. Berlin C, Berg EL, Briskin MJ, et al. Alpha 4 beta 7 integrin mediates lymphocyte binding to the mucosal vascular addressin MAdCAM-1. Cell 1993; 74:185-95. 4. Pulido R, Elices MJ, Campanero MR, et al. Functional evidence for three distinct and independently inhibitable adhesion activities mediated by the human integrin VLA-4. Correlation with distinct alpha 4 epitopes. J. Biol. Chem. 1991; 266:10241-5.

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