CST, 4562S, TFII-I Antibody

Polyclonal Antibody for studying GTFII-I. Validated for Western Blotting,Immunoprecipitation,Immunohistochemistry (Paraffin). Highly specific and rigorously validated in-house, TFII-I Antibody (CST #4562) is ready to ship. Product Usage Information Western Blotting: 1:1000 Immunoprecipitation: 1:50 Immunohistochemistry (Paraffin): 1:200 - 1:800 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting, Immunoprecipitation, Immunohistochemistry (Paraffin) Specificity / Sensitivity TFII-I Antibody detects endogenous levels of total TFII-I (all isoforms). Species Reactivity: Human, Mouse, Monkey Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues of human TFII-I. Antibodies are purified by protein A and peptide affinity chromatography. Background TFII-I (also known as SPIN and BAP-135) is a multifunctional transcription factor that facilitates basal transcriptional machinery assembly at the core promotor region, as well as the assembly of the transcriptional activator complex at upstream regulatory sites (1). Four isoforms of TFII-I (alpha, beta, gamma, and delta) form homo- or heteromeric complexes, which may perform different functions on different promoters (1). In B cells, cross-linking of BCR (B cell receptors) leads to TFII-I phosphorylation at Tyr248 by Btk (2). This phosphorylation disrupts the association of Btk and TFII-I and enhances TFII-I transcriptional activity and nuclear localization (2). In nonlymphoid cells, TFII-I is phosphorylated at Tyr248 by Src dependent kinase or JAK2 (3,4). PKG (cGMP-dependent kinase) interacts with and phosphorylates TFII-I at Ser371 and 743, which also promotes TFII-I transcription activity (5). TFII-I activity is also modulated by HDAC3 (Histone Deacetylase 3) through a physical interaction between the two proteins (6). Alternate Names BAP-135; BAP135; Bruton tyrosine kinase-associated protein 135; BTK-associated protein 135; BTK-associated protein, 135kD; BTKAP1; DIWS; FLJ38776; FLJ56355; General transcription factor II-I; general transcription factor IIi; GTF2I; GTFII-I; IB291; SPIN; SRF-Phox1-interacting protein; TFII-I; WBS; WBSCR6; Williams-Beuren syndrome chromosomal region 6 protein; Williams-Beuren syndrome chromosome region 6 Specification REACTIVITY: H M Mk SENSITIVITY: Endogenous MW (kDa): 135, 138 SOURCE: Rabbit