|Application ||WB, IHC|
|Reactivity||Human, Mouse, Rat|
|Calculated MW||27930 Da|
|Other Names||Linker for activation of T-cells family member 1, 36 kDa phospho-tyrosine adapter protein, pp36, p36-38, LAT|
|Target/Specificity||A synthetic phospho-peptide corresponding to residues surrounding Tyr191 of human LAT was used as immunogen. The antibody only detects LAT phosphorylated on Tyrosine 191.|
|Format||50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.|
|Storage||Maintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.|
|Precautions||LAT Antibody Phospho (pY191) is for research use only and not for use in diagnostic or therapeutic procedures.|
|Function||Required for TCR (T-cell antigen receptor)- and pre-TCR- mediated signaling, both in mature T-cells and during their development. Involved in FCGR3 (low affinity immunoglobulin gamma Fc region receptor III)-mediated signaling in natural killer cells and FCER1 (high affinity immunoglobulin epsilon receptor)-mediated signaling in mast cells. Couples activation of these receptors and their associated kinases with distal intracellular events such as mobilization of intracellular calcium stores, PKC activation, MAPK activation or cytoskeletal reorganization through the recruitment of PLCG1, GRB2, GRAP2, and other signaling molecules.|
|Cellular Location||Cell membrane; Single-pass type III membrane protein Note=Present in lipid rafts|
|Tissue Location||Expressed in thymus, T-cells, NK cells, mast cells and, at lower levels, in spleen. Present in T-cells but not B-cells (at protein level).|
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Provided below are standard protocols that you may find useful for product applications.
LAT (linker for activation of T-cells) is involved in the T-cell antigen receptor (TCR) signal transduction pathway, and may play an important role downstream in activating protein tyrosine kinases (1). LAT is phosphorylated by ZAP-70/Syk protein tyrosine kinases leading to recruitment of multiple signaling molecules (2). It has been found that Tyr191 and Tyr171 are required for T-cell activation and Tyr132 is required for the activation of PLCgamma1 and Ras signaling pathways, respectively. Tyr226 and Tyr191 are required for Vav binding, whereas Tyr171 and Tyr132 are necessary for association and activation of phosphoinositide 3-kinase activity and PLCgamma1 (3).
1. Weber, J.R., et al. Molecular cloning of the cDNA encoding pp36, a tyrosine-phosphorylated adaptor protein selectively expressed by T cells and natural killer cells. J Exp Med. 187: 1157
2. Zhang, W., et al. LAT: the ZAP-70 tyrosine kinase substrate that links T cell receptor to cellular activation. Cell 92: 83
3. Paz, P.E., et al. Mapping the Zap-70 phosphorylation sites on LAT (linker for activation of T cells) required for recruitment and activation of signalling proteins in T cells. Biochem J. 356(Pt 2): 461-71 (2001).
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