Human Integrin alpha 2/CD49b Antibody Summary
Tyr30-Thr1132
Accession # P17301
Applications
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Reconstitution Calculator
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Integrin alpha 2/CD49b
Integrin alpha 2 is one of twelve integrin family alpha subunits that share the beta 1 subunit (1‑3). Integrin alpha 2 beta 1 is the non-covalent heterodimer of 160 kDa alpha 2 (CD49b) and 130 kDa beta 1 (CD29) type I transmembrane glycoprotein subunits and is one of six very late antigens on activated T cells, designated VLA2 (3). The alpha 2 extracellular domain (ECD) contains an I (inserted) domain which includes the ligand binding site (2, 3). The beta 1 ECD contains a vWFA domain, which participates in binding. Each subunit then has a transmembrane sequence and a short cytoplasmic tail. The dimer is folded when it is least active. Divalent cations and intracellular (inside-out) signaling convert it to its most active, extended and open conformation (1, 2). The 1102 amino acid (aa) human alpha 2 extracellular domain (ECD) shares 83‑89% aa sequence identity with mouse, rat, canine, bovine and equine alpha 2. The I domain-containing beta 1 integrins ( alpha 1 beta 1, alpha 2 beta 1, alpha 10 beta 1 and alpha 11 beta 1) all bind collagens, with alpha 2 beta 1 preferring collagens I‑III (4, 5). Platelet alpha 2 beta 1, also called GPIa, cooperates with another adhesion protein, GPVI, to coordinate platelet collagen binding and activation (3, 6, 7). Other alpha 2 beta 1 ligands include laminin, decorin, E-cadherin, and collagen-like regions of collectin molecules such as C1q (4). Adhesion is synergized by crosstalk with syndecan-1 or HGF R/c-Met, and antagonized by crosstalk with Integrin alpha 1 beta 1 (8‑10). In addition to expression on selected hematopoietic cells, alpha 2 beta 1 is present on a wide variety of non-hematopoietic cells (4). Mice deficient in the alpha 2 subunit have defects in innate immune responses, wound mast cell infiltration and angiogenesis, and platelet responses to collagen (6, 11, 12). In innate immunity, alpha 2 beta 1 binding to C1q initiates the complement cascade and costimulates mast cell activation, triggering neutrophil influx (4, 12).
- Takada, Y. et al. (2007) Genome Biol. 8:215.
- Luo, B-H. et al. (2007) Annu. Rev. Immunol. 25:619.
- Takada, Y. and M.E. Hemler (1989) J. Cell Biol. 109:397.
- Zutter, M.M. and B.T Edelson (2007) Immunobiology 212:343.
- McCall-Culbreath, K.D. and M.M. Zutter (2008) Curr. Drug Targets 9:139.
- Sarratt, K.L. et al. (2005) Blood 106:1268.
- Lecut, C. et al. (2005) Thromb. Haemost. 94:107.
- Vuoriluoto, K. et al. (2008) Exp. Cell Res. 314:3369.
- McCall-Culbreath, K.D. et al. (2008) Blood 111:3562.
- Abair, T.D. et al. (2008) Exp. Cell Res. 314:3593.
- Zweers, M. et al. (2006) J. Invest. Dermatol. 127:467.
- Edelson, B.T. et al. 2006) Blood 107:143.
Product Datasheets
Citations for Human Integrin alpha 2/CD49b Antibody
R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.
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The effects of inhibition and siRNA knockdown of collagen-binding integrins on human umbilical vein endothelial cell migration and tube formation
Authors: EJ Hunter, SW Hamaia, PS Kim, JM Malcor, RW Farndale
Scientific Reports, 2022-12-14;12(1):21601.
Species: Human
Sample Types: Cell Lysates
Applications: Western Blot -
FKBP10 Acts as a New Biomarker for Prognosis and Lymph Node Metastasis of Gastric Cancer by Bioinformatics Analysis and in Vitro Experiments
Authors: LB Gong, C Zhang, RX Yu, C Li, YB Fan, YP Liu, XJ Qu
Onco Targets Ther, 2020-07-28;13(0):7399-7409.
Species: Human
Sample Types: Cell Lysates
Applications: Western Blot -
Nanoparticle biointerfacing by platelet membrane cloaking.
Authors: Hu C, Fang R, Wang K, Luk B, Thamphiwatana S, Dehaini D, Nguyen P, Angsantikul P, Wen C, Kroll A, Carpenter C, Ramesh M, Qu V, Patel S, Zhu J, Shi W, Hofman F, Chen T, Gao W, Zhang K, Chien S, Zhang L
Nature, 2015-09-16;526(7571):118-21.
Species: Human
Sample Types: Cell Lysates
Applications: Western Blot
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