May function as a testis specific transcription factor. Binds DNA in conjunction with GTF2A2 and TBP (the TATA-binding protein) and together with GTF2A2, allows mRNA transcription.
Subcellular locations: Nucleus
Mainly localizes in the annulus and partly in acrosomal cap area of spermatozoa.
Testis specific. Detected in adult testis mostly in round and elongating spermatids (at protein level). Detected in testis.