Component of the core-TFIIH basal transcription factor involved in nucleotide excision repair (NER) of DNA and, when complexed to CAK, in RNA transcription by RNA polymerase II. The N-terminus interacts with and regulates XPD whereas an intact C-terminus is required for a successful escape of RNAP II form the promoter.
Widely expressed, with higher expression in skeletal muscle.
Belongs to the GTF2H2 family. Contains 1 VWFA domain.