The intronless gene for this transcription coactivator is
located between the protocadherin beta and gamma gene clusters on
chromosome 5. The protein encoded by this gene is a component of
the TFIID protein complex, a complex which binds to the TATA box in
class II promoters and recruits RNA polymerase II and other
factors. This particular subunit interacts with the largest TFIID
subunit, as well as multiple transcription activators. The protein
is required for transcription by promoters targeted by RNA
polymerase II.
