Description
Product Usage Information
Western Blotting: 1:1000
Immunohistochemistry (Paraffin): 1:100 - 1:400
Storage
Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at -20°C. Do not aliquot the antibody. For a carrier-free (BSA and azide free) version of this product see product # 94358 .
Protocol
Available protocols: Western Blotting, Immunohistochemistry (Paraffin)
Specificity / Sensitivity
Phospho-CrkL (Tyr207) (E9A1U) Rabbit Monoclonal Antibody recognizes endogenous levels of CrkL protein only when phosphorylated at Tyr207. This antibody does not recognize phospho-CrkII at Tyr221.
Species Reactivity: Human, Mouse, Rat
Source / Purification
Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Tyr207 of human CrkL protein.
Background
CrkL, a 39 kDa adaptor protein, has a key regulatory role in hematopoietic cells. CrkL has one SH2 and two SH3 domains, with 60% homology to CrkII (1). The amino-terminal SH3 domain of CrkL binds proteins, such as C3G, SOS, PI3K, c-Abl, and BCR/Abl. The SH2 domain of CrkL can bind to tyrosine-phosphorylated proteins, such as Cbl, HEF1, CAS, and paxillin (2,3). CrkL is involved in various signaling cascades initiated by different cytokines and growth factors. The biological outcomes of the Crk-activated signal transduction include the modulation of cell adhesion, cell migration, and immune cell responses (4). CrkL is a prominent substrate of the BCR/Abl oncoprotein in chronic myelogenous leukemia and binds to both BCR/Abl and c-Abl (5). CrkL is prominently and constitutively tyrosine phosphorylated in CML neutrophils and is not phosphorylated in normal neutrophils. Moreover, stimulation of normal neutrophils with cytokines and agonists does not induce tyrosine phosphorylation of this protein (6), indicating that it may be a useful target for therapeutic intervention or as a disease marker. Tyr207 in CrkL is the BCR/Abl phosphorylation site (7).
Alternate Names
CRK like proto-oncogene, adaptor protein; Crk-like protein; CRKL; v-crk avian sarcoma virus CT10 oncogene homolog-like; v-crk sarcoma virus CT10 oncogene homolog (avian)-like
