TFIIA is a component of the transcription machinery of RNA polymerase II and plays an important role in transcriptional activation. TFIIA in a complex with TBP mediates transcriptional activity (By similarity). Protein involved in the resistance to X.oryzae. TFIIA is a heterodimer of the large unprocessed subunit 1 and a small subunit gamma. It was originally believed to be a heterotrimer of an alpha, a beta and a gamma subunit (By similarity). The displayed sequence corresponds to the form of the protein present in strains susceptible to X.oryzae. Substitution of Val-39 to Glu-39 in cultivar indica IRBB5 confers resistance to X.oryzae. Belongs to the TFIIA subunit 2 family.