CRLK (Crk-like Protein)

CrkL is a 39kD adaptor protein, originally cloned in proximity to the BCR gene on chromosome 22, which has a key regulatory role in hematopoietic cells. CrkL has one SH2 and two SH3 domains, with 60% homology to CrkII. Structurally, the amino-terminal SH3 domain of CrkL has been shown to bind proteins such as C3G, SOS, PI3K, c-Abl or BCR/Abl. The SH2 domain of CrkL can bind to tyrosine phosphorylated proteins such as Cbl, HEF1, CAS or paxillin. CrkL is involved in various signalings initiated by different cytokines and growth factors. The biological outcomes of the Crk-activated signal transduction cascades include the modulation of cell adhesion, cell migration, immune cell responses and so on. CrkL is a prominent substrate of the BCR/Abl oncoprotein in chronic myelogenous leukemia and binds to both BCR/Abl and c-Abl. 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, indicating that it may be a useful target for therapeutic intervention or as a disease marker. Tyrosine 207 in CrkL is the BCR/Abl phosphorylation site.\n\nApplications:\nSuitable for use in Western Blot and ELISA. Other applications not tested.\n\nRecommended Dilution:\nWestern Blot: 0.01-0.03ug/ml\nELISA: >1:16,000\nOptimal dilutions to be determined by the researcher.\n\nPositive Control:\nK562\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

C7925-50F

Size

100ug

Applications

ELISA, WB

Hosts

Goat

Reactivities

Hum

Form

Supplied as a liquid in Tris saline, 0.02% sodium azide, pH7.3, 0.5% BSA.

P Type

Pab

Purity

Purified by immunoaffinity chromatography.

Isotype

IgG

References

1. Guris DL, Fantes J, Tara D, Druker BJ, Imamoto A. Mice lacking the homologue of the human 22q11.2 gene CRKL phenocopy neurocristopathies of DiGeorge syndrome. Nat Genet. 2001 Mar;27(3):293-8. PMID: 11242111.

Additional Info

Recognizes human CRLK. Species sequence homology: mouse and rat.