TAF4B Polyclonal Antibody

function:Cell type-specific subunit of TFIID that may function as a gene-selective coactivator in certain cells. TFIID is a multimeric protein complex that plays a central role in mediating promoter responses to various activators and repressors. TAFII105 is a transcriptional coactivator of the p65/RELA NF-kappa-B subunit. Involved in the activation of a subset of antiapoptotic genes including TNFAIP3. May be involved in regulating folliculogenesis. Through interaction with OCBA/POU2AF1, acts as a coactivator of B cell-specific transcription.,PTM:Under stimulation by forskolin, Isoform 1 is phosphorylated by protein kinase A (PKA).,similarity:Belongs to the TAF4 family.,similarity:Contains 1 histone-fold domain.,similarity:Contains 1 TAFH (NHR1) domain.,subcellular location:Export into the cytoplasm is mediated by a CRM1-independent nuclear export pathway and not by phosphorylation.,subunit:TFIID is composed of TATA binding protein (TBP) and a number of TBP-associated factors (TAFs). Heterodimerizes with TAF12/TFII20 via the C-terminal H2A-like histone-fold domain. This heterodimer forms a histone-like octamer with the TAF6/TAFII70-TAF9/TAFII31 heterodimer. Interacts with P65/RELA homodimers and P65/RELA-REL heterodimers. Interaction with POU2AF1, via its C-terminal activation domain, is required for octamer-dependent transcription.,tissue specificity:Preferentially expressed in ovarian granulosa cells (at protein level). Highly expressed in B cells.,