Tyrosine-protein kinase SYK; Spleen tyrosine kinase; p72-Syk; SYK

For Research Use Only. Not for use in diagnostic procedures.

The synthetic peptide sequence used to generate the antibody was selected from the region of human Phospho-Syk-Y525/526. A 10 to 100 fold molar excess to antibody is recommended. Precise conditions should be optimized for a particular assay.

The synthetic peptide was lyophilized with 100% acetonitrile and is supplied as a powder. Reconstitute with 0.1 ml deionized water for a final concentration of 1 mg/ml.

Maintain refrigerated at 2-8 degree C for up to 6 months. For long term storage store at -20 degree C.

Small volumes of SYK blocking peptide vial(s) may occasionally become entrapped in the seal of the product vial during shipment and storage. If necessary, briefly centrifuge the vial on a tabletop centrifuge to dislodge any liquid in the container`s cap. Certain products may require to ship with dry ice and additional dry ice fee may apply.

Non-receptor tyrosine kinase which mediates signal transduction downstream of a variety of transmembrane receptors including classical immunoreceptors like the B-cell receptor (BCR). Regulates several biological processes including innate and adaptive immunity, cell adhesion, osteoclast maturation, platelet activation and vascular development. Assembles into signaling complexes with activated receptors at the plasma membrane via interaction between its SH2 domains and the receptor tyrosine- phosphorylated ITAM domains. The association with the receptor can also be indirect and mediated by adapter proteins containing ITAM or partial hemITAM domains. The phosphorylation of the ITAM domains is generally mediated by SRC subfamily kinases upon engagement of the receptor. More rarely signal transduction via SYK could be ITAM-independent. Direct downstream effectors phosphorylated by SYK include VAV1, PLCG1, PI-3-kinase, LCP2 and BLNK. Initially identified as essential in B-cell receptor (BCR) signaling, it is necessary for the maturation of B-cells most probably at the pro-B to pre-B transition. Activated upon BCR engagement, it phosphorylates and activates BLNK an adapter linking the activated BCR to downstream signaling adapters and effectors. It also phosphorylates and activates PLCG1 and the PKC signaling pathway. It also phosphorylates BTK and regulates its activity in B-cell antigen receptor (BCR)-coupled signaling. In addition to its function downstream of BCR plays also a role in T- cell receptor signaling. Plays also a crucial role in the innate immune response to fungal, bacterial and viral pathogens. It is for instance activated by the membrane lectin CLEC7A. Upon stimulation by fungal proteins, CLEC7A together with SYK activates immune cells inducing the production of ROS. Also activates the inflammasome and NF-kappa-B-mediated transcription of chemokines and cytokines in presence of pathogens. Regulates neutrophil degranulation and phagocytosis through activation of the MAPK signaling cascade. Also mediates the activation of dendritic cells by cell necrosis stimuli. Also involved in mast cells activation. Also functions downstream of receptors mediating cell adhesion. Relays for instance, integrin-mediated neutrophils and macrophages activation and P-selectin receptor/SELPG-mediated recruitment of leukocytes to inflammatory loci. Plays also a role in non-immune processes. It is for instance involved in vascular development where it may regulate blood and lymphatic vascular separation. It is also required for osteoclast development and function. Functions in the activation of platelets by collagen, mediating PLCG2 phosphorylation and activation. May be coupled to the collagen receptor by the ITAM domain-containing FCER1G. Also activated by the membrane lectin CLEC1B that is required for activation of platelets by PDPN/podoplanin. Involved in platelet adhesion being activated by ITGB3 engaged by fibrinogen.

69,510 Da

spleen associated tyrosine kinase

tyrosine-protein kinase SYK

Tyrosine-protein kinase SYK

KSYK_HUMAN

This gene encodes a member of the family of non-receptor type Tyr protein kinases. This protein is widely expressed in hematopoietic cells and is involved in coupling activated immunoreceptors to downstream signaling events that mediate diverse cellular responses, including proliferation, differentiation, and phagocytosis. It is thought to be a modulator of epithelial cell growth and a potential tumour suppressor in human breast carcinomas. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2010]

Syk: a cytoplasmic tyrosine kinase of the SYK family containing two SH2 domains. Plays a central role in the B cell receptor (BCR) response. An upstream activator of the PI3K, PLCgamma2, and Rac/cdc42 pathways in the BCR response. Required for the sequential events of Fc gamma IIa receptor-mediated phagocytosis. Expression highest in murine spleen, heart, mammary gland and thymus. Two splice variant isoforms have been described.

Protein type: Kinase, protein; Protein kinase, TK; EC 2.7.10.2; Protein kinase, tyrosine (non-receptor); TK group; Syk family

Chromosomal Location of Human Ortholog: 9q22

Cellular Component: cytoplasm; cytosol; extrinsic to internal side of plasma membrane; nucleus; plasma membrane; protein complex; T cell receptor complex

Molecular Function: integrin binding; non-membrane spanning protein tyrosine kinase activity; protein binding; protein kinase activity; protein serine/threonine kinase activity; protein-tyrosine kinase activity

Biological Process: adaptive immune response; B cell receptor signaling pathway; blood vessel morphogenesis; cell proliferation; defense response to bacterium; inflammatory response; innate immune response; integrin-mediated signaling pathway; leukocyte activation during immune response; leukocyte adhesion; lymph vessel development; macrophage activation during immune response; neutrophil activation during immune response; neutrophil chemotaxis; organ morphogenesis; platelet activation; positive regulation of alpha-beta T cell proliferation; positive regulation of B cell differentiation; positive regulation of bone resorption; positive regulation of cell adhesion mediated by integrin; positive regulation of mast cell degranulation; protein amino acid phosphorylation; receptor internalization; regulation of neutrophil degranulation; regulation of phagocytosis; regulation of superoxide release; regulation of transcription factor activity; serotonin secretion by platelet; stimulatory C-type lectin receptor signaling pathway; transcription factor import into nucleus; transmembrane receptor protein tyrosine kinase signaling pathway

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