BOB-1 interacts with the sequence-specific DNA-binding POU transcription factors (named after the founding family members PIT1, OCT1/2, and UNC86), the ubiquitously expressed OCT1 (POU2F1) and lymphoid-specific OCT2 (POU2F2). As a transcriptional co-activator, BOB-1 itself does not bind DNA but is rather recruited into transcriptional regulation via interaction with DNA-bound POU-domain transcription factors OCT1 and OCT2. The POU-domain is a unique bipartite structure allowing DNA recognition with remarkable flexibility .
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