|Reactivity||Human, Mouse, Rat|
|Calculated MW||114900 Da|
|Other Names||Integrin alpha-4, CD49 antigen-like family member D, Integrin alpha-IV, VLA-4 subunit alpha, CD49d, ITGA4, CD49D|
|Target/Specificity||A phospho-specific peptide corresponding to residues on human Integrin alpha 4 was used as an immunogen. The antibody only detects Integrin alpha4 phosphorylated on Serine 1027. The antibody detects the mature chain (180 kDa), the precursor (140 kDa) and the cleaved C terminal (70 kDa).|
|Format||50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.|
|Storage||Maintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.|
|Precautions||Integrin-alpha4 Antibody Phospho-ps1027 is for research use only and not for use in diagnostic or therapeutic procedures.|
|Function||Integrins alpha-4/beta-1 (VLA-4) and alpha-4/beta-7 are receptors for fibronectin. They recognize one or more domains within the alternatively spliced CS-1 and CS-5 regions of fibronectin. They are also receptors for VCAM1. Integrin alpha- 4/beta-1 recognizes the sequence Q-I-D-S in VCAM1. Integrin alpha- 4/beta-7 is also a receptor for MADCAM1. It recognizes the sequence L-D-T in MADCAM1. On activated endothelial cells integrin VLA-4 triggers homotypic aggregation for most VLA-4-positive leukocyte cell lines. It may also participate in cytolytic T-cell interactions with target cells. ITGA4:ITGB1 binds to fractalkine (CX3CL1) and may act as its coreceptor in CX3CR1-dependent fractalkine signaling (PubMed:23125415). ITGA4:ITGB1 binds to PLA2G2A via a site (site 2) which is distinct from the classical ligand-binding site (site 1) and this induces integrin conformational changes and enhanced ligand binding to site 1 (PubMed:18635536, PubMed:25398877).|
|Cellular Location||Membrane; Single-pass type I membrane protein|
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Provided below are standard protocols that you may find useful for product applications.
Integrin alpha 4 is a cell surface heterodimer (VLA4, CD49d/CD29) which belongs to the integrin family and is involved in cell-extracellular matrix interactions, as well as in intercellular adhesion. Unlike other integrin alpha subunits, the alpha subunit of Integrin alpha 4 can appear as a 150-kDa polypeptide (alpha 150), or cleaved into two non-covalently associated polypeptides (alpha 70-80). The relative proportion of each form is highly variable among different cells and is dependent on the state of cellular activation (1). Integrin alpha 4 regulates cellular functions, differently from other integrins, through its cytoplasmic tail, making it indispensable for embryogenesis, haematopoiesis and immune responses (2). Integrin alpha 4, initially discovered on lymphoid cells, is actually known to be highly expressed on T cells, B cells, monocytes, and derived cell lines (3). It has a key function in the adhesion interaction between stem/progenitor cells and the stromal microenvironmental cells and their matrix within the bone marrow (4).
1. Rubio M, et al. Eur J Immunol. 22(4):1099-102, 1992
2. Liu S, et al. Nature. 402(6762):676-81, 1999
3. Zhang ZH, et al. Blood. 78(9):2396-9, 1991
4. Mittelbrunn M, et al. UCSD-Nature Molecule Pages, 2006
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