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. 1994 May;14(5):3310–3319. doi: 10.1128/mcb.14.5.3310

The recombination signal sequence-binding protein RBP-2N functions as a transcriptional repressor.

S Dou 1, X Zeng 1, P Cortes 1, H Erdjument-Bromage 1, P Tempst 1, T Honjo 1, L D Vales 1
PMCID: PMC358697  PMID: 8164682

Abstract

We have identified a cellular protein, RBP-2N, a presumed recombinase, as a repressor of transcription. Inhibition of transcription by RBP-2N was dependent on its DNA recognition site and was demonstrated in vitro and in vivo. This repression appears to be general, as transcription mediated by SP1 and Gal4/VP16 was inhibited by RBP-2N. The protein was purified to near homogeneity from human cells on the basis of its binding to a site present in the promoter of the adenovirus pIX gene. The DNA recognition sequence is 5'-TGGGAAAGAA, which is markedly different from the recombination signal sequence originally identified as the target site for this protein. The sequence of the purified protein is 97% identical with that published for the mouse RBP-2N protein. The reported homolog in Drosophila is Suppressor of Hairless. RBP-2N binding sites are present in a number of cellular and viral promoters, so RBP-2N may have a general role in transcriptional repression.

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