Abstract
A novel octamer binding protein expressed specifically in cervical cells but not in other cell types has been identified. This protein differs in size and sequence specificity from the constitutively expressed octamer binding protein OTF-1. In particular it binds with higher affinity to a sequence in the human papillomavirus 16 (HPV) upstream regulatory region which has a seven out of eight base pair match compared to the consensus octamer motif. This is the first example of a tissue specific protein which has been observed to bind to the papillomavirus enhancer. The possible role of this protein in producing the observed tissue specific activity of the enhancer and in cervical carcinogenesis induced by HPV is discussed.
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