SUB1 Antibody – Rabbit Polyclonal

PC4: a transcriptional coactivator that functions cooperatively with TAFs and mediates functional interactions between upstream activators and the general transcriptional machinery. May be involved in stabilizing the multiprotein transcription complex. Binds single-stranded DNA. Also binds, in vitro, nonspecifically to double-stranded DNA (ds DNA). Interacts with CSTF2. Its activity is controlled by phosphorylation of the regulatory domain. Phosphorylation inactivates both dsDNA-binding and cofactor function. Seems to be phosphorylated in vivo by CK2 in at least 7 sites in the N-terminal Ser-rich region.

Protein type: DNA-binding; Transcription, coactivator/corepressor; Nuclear receptor co-regulator

Chromosomal Location of Human Ortholog: 5p13.3

Cellular Component: transcription factor complex; nucleolus; nucleus

Molecular Function: protein binding; transcription coactivator activity; single-stranded DNA binding

Biological Process: regulation of transcription from RNA polymerase II promoter; transcription, DNA-dependent; positive regulation of transcription from RNA polymerase II promoter