GTF3A: Proteins and Enzymes

The GTF3A gene encodes a zinc finger protein with nine Cis(2)-His(2) domains that interacts with the internal control region (ICR) of approximately 50 bases within 5S RNA genes. This is where it works as a RNA polymerase III transcription factor to induce transcription of the 5S rRNA genes. The proteins coded by the GTF3A gene also play a role in regulating the stability of transcription of other genes. The GTF3A gene exists in two isoforms: isoform 1 is 365 amino acids long at 41 kDA while isoform 2 is 340 amino acids long at 38 kDA. GTF3A has been investigated in its role in apnea, glaucoma, digeorge syndrome, acute liver failure, and endocarditis. GTF3A participates in RNA polymerase III transcription and interacts with genes ABL1, FYN, CXCR2, GTF3C2, and EPN1.