Function:Transcription factor that specifically binds to the octamer motif (5'-ATTTGCAT-3') . Regulates transcription in a number of tissues in addition to activating immunoglobulin gene expression. Modulates transcription transactivation by NR3C1 , AR and PGR. Isoform 5 activates the U2 small nuclear RNA (snRNA) promoter. ,similarity:Belongs to the POU transcription factor family. Class-2 subfamily. ,similarity:Contains 1 homeobox DNA-binding domain. ,similarity:Contains 1 POU-specific domain. ,subunit:Interacts with NR3C1 , AR and PGR. ,tissue specificity:Isoform 3 is B-cell specific. Isoform 5 is expressed in B-cells and the immunoglobulin-expressing T-cell line Molt-4 , but not in the T-cell line BW 5147. ,
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