In eukaryotic systems, initiation of transcription from protein-coding genes is a complex process requiring RNA polymerase II and broad families of auxiliary transcription factors. Such factors can be divided into two major functional classes: the basal factors that are required for transcription of all Pol II genes, including TFIIA, TFIIB, TFIID, TFIIE, TFIIF and TFIIH; and sequence-specific factors that regulate gene expression. The basal transcription factors and Pol II form a specific multiprotein complex near the transcription start site by interacting with core promotor elements such as the TATA box generally located 25-30 base pairs upstream of the transcription start site. TFIIF, a heteromer composed of a small (RAP 30) and a large (RAP 74) subunit, is required for RNA polymerase II to assemble into a preinitiation complex formed by promotor DNA and the general factors TFIID, IIA and IIB. In addition, TFIIF stimulates transcription elongation by RNA polymerase II.
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Protein Aliases: BTF4; C76800; General transcription factor IIF 74 kDa subunit; General transcription factor IIF subunit 1; General transcription factor IIF, polypeptide 1, 74kDa; Gtf2f1; MGC94148; OTTHUMP00000237859; RAP74; T2FA_HUMAN; TF2F1; TFIIF; TFIIF-alpha; Transcription initiation factor IIF subunit alpha; Transcription initiation factor RAP74
Gene Aliases: BTF4; GTF2F1; RAP74; TF2F1; TFIIF
UniProt ID: (Human) P35269