ZAP70 Blocking Peptide for STJ506008 is synthetically produced from the 350-410 sequence and is suitable for use in western blot applications.
Applications
Immunodepletion/Immunocompetition
Note
STRICTLY FOR FURTHER SCIENTIFIC RESEARCH USE ONLY (RUO). MUST NOT TO BE USED IN DIAGNOSTIC OR THERAPEUTIC APPLICATIONS.
Product Properties
Formulation
Liquid form at 2.5mg/ml concentration in PBS. Up to 5% DMSO can be added. Orders with >1mg can be supplied in lyophilized powder form, or in buffer of choice.
Storage Instruction
Store at-20°C for long term storage. Avoid freeze-thaw cycles.
Synthetic peptide taken within amino acid region 350-410 on human Tyrosine-protein kinase ZAP-70.
Immunogen Region
350-410
Specificity
This blocking peptide is recommended for use in combination with ZAP70 antibody, STJ506008
Additional Info
Tissue Specificity
Expressed in T- and natural killer cells. Also present in early thymocytes and pro/pre B-cells.
Post Translational Modifications
Phosphorylated on tyrosine residues upon T-cell antigen receptor (TCR) stimulation. Phosphorylation of Tyr-315 and Tyr-319 are essential for ZAP70 positive function on T-lymphocyte activation whereas Tyr-292 has a negative regulatory role. Within the C-terminal kinase domain, Tyr-492 and Tyr-493 are phosphorylated after TCR induction, Tyr-492 playing a negative regulatory role and Tyr-493 a positive. Tyr-493 is dephosphorylated by PTN22. Ubiquitinated in response to T cell activation. Deubiquitinated by OTUD7B.
Function
Tyrosine kinase that plays an essential role in regulation of the adaptive immune response. Regulates motility, adhesion and cytokine expression of mature T-cells, as well as thymocyte development. Contributes also to the development and activation of primary B-lymphocytes. When antigen presenting cells (APC) activate T-cell receptor (TCR), a serie of phosphorylations lead to the recruitment of ZAP70 to the doubly phosphorylated TCR component CD247/CD3Z through ITAM motif at the plasma membrane. This recruitment serves to localization to the stimulated TCR and to relieve its autoinhibited conformation. Release of ZAP70 active conformation is further stabilized by phosphorylation mediated by LCK. Subsequently, ZAP70 phosphorylates at least 2 essential adapter proteins: LAT and LCP2. In turn, a large number of signaling molecules are recruited and ultimately lead to lymphokine production, T-cell proliferation and differentiation. Furthermore, ZAP70 controls cytoskeleton modifications, adhesion and mobility of T-lymphocytes, thus ensuring correct delivery of effectors to the APC. ZAP70 is also required for TCR-CD247/CD3Z internalization and degradation through interaction with the E3 ubiquitin-protein ligase CBL and adapter proteins SLA and SLA2. Thus, ZAP70 regulates both T-cell activation switch on and switch off by modulating TCR expression at the T-cell surface. During thymocyte development, ZAP70 promotes survival and cell-cycle progression of developing thymocytes before positive selection (when cells are still CD4/CD8 double negative). Additionally, ZAP70-dependent signaling pathway may also contribute to primary B-cells formation and activation through B-cell receptor (BCR).
CytoplasmCell MembranePeripheral Membrane ProteinIn Quiescent T-LymphocytesIt Is CytoplasmicUpon Tcr ActivationIt Is Recruited At The Plasma Membrane By Interacting With Cd247/Cd3zColocalizes Together With Rhoh In The Immunological SynapseRhoh Is Required For Its Proper Localization To The Cell Membrane And Cytoskeleton Fractions In The Thymocytes
Alternative Peptide Names
Tyrosine-Protein Kinase Zap-70 protein70 Kda Zeta-Chain Associated Protein proteinSyk-Related Tyrosine Kinase proteinZAP70 proteinSRK protein
