Human Thrombospondin-2 Antibody
Human Thrombospondin-2 Antibody Summary
Accession # P35442
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.
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.
Thrombospondin-2 (TSP-2) is a 150 kDa calcium-binding protein that modulates cellular interactions with extracellular matrix. Thrombospondin-1 and -2 constitute subgroup A thrombospondin family members and form disulfide-linked homotrimers, whereas Thrombospondin-3, -4, and -5/COMP constitute subgroup B and form homopentamers (1-4). The human TSP-2 cDNA encodes a 1172 amino acid (aa) precursor that includes an 18 aa signal sequence followed by an N-terminal heparin‑binding domain, an oligomerization motif, one vWF-C domain, three TSP type-1 repeats, three EGF-like repeats, seven TSP type-3 repeats, and a lectin-like TSP C‑terminal domain (5). Human TSP-2 shares 88-90% aa sequence identity with bovine, mouse, and rat TSP-2. Within the TSP type-3 repeats and TSP C‑terminal domain, human TSP-2 shares 80% aa sequence identity with human TSP-1 and approximately 60% aa sequence identity with human TSP-3, -4, and -5/COMP. TSP‑2 regulates collagen matrix formation by altering fibroblast behavior during development and in areas of tissue remodeling in the adult (6, 7). Trimerization of TSP-2 is required for the calcium-dependent cell attachment and spreading functions, while the heparin-binding domain is responsible for the destabilization of focal adhesion sites (8-10). The heparin-binding domain also mediates binding to Integrins alpha 3 beta 1 and alpha 6 beta 1 on microvascular endothelial cells (EC) and Integrin alpha 4 beta 1 on large blood vessel EC (11, 12). A fragment of TSP-2 (heparin-binding domain, oligomerization motif, and vWF-C domain) promotes EC survival, proliferation, and chemotaxis (11). Inclusion of the three TSP type-1 domains results in a molecule that inhibits VEGF-induced EC migration and vascular tube formation (13, 14). In vivo, full length TSP-2 blocks tumor angiogenesis and induces vascular EC apoptosis (13, 15). HPRG functions as an apparent decoy receptor by preventing interaction of TSP-2 with CD36 on macrophages and microvasculature EC (14). TSP-2 also binds MMP-2 and facilitates MMP-2 clearance by the scavenger receptor LRP (16).
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Citations for Human Thrombospondin-2 Antibody
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Citations: Showing 1 - 2
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Long-term gene therapy with thrombospondin 2 inhibits TGF-beta activation, inflammation and angiogenesis in chronic allograft nephropathy.
Authors: Daniel C, Vogelbacher R, Stief A, Grigo C, Hugo C
PLoS ONE, 2013;8(12):e83846.
Sample Types: Whole Tissue
Increased cortical expression of two synaptogenic thrombospondins in human brain evolution.
Authors: Caceres M, Suwyn C, Maddox M, Thomas JW, Preuss TM
Cereb. Cortex, 2007;17(10):2312-21.
Sample Types: Tissue Homogenates
Applications: Western Blot
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We used this antibody for developing a sandwich ELISA in combination with mAb (cat. MAB16351) and protein (cat. 1635-T2). This combination works well detecting TSP2 in human serum.