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. 1988 Sep;85(17):6347–6351. doi: 10.1073/pnas.85.17.6347

A herpesvirus trans-activating protein interacts with transcription factor OTF-1 and other cellular proteins.

T Gerster 1, R G Roeder 1
PMCID: PMC281967  PMID: 2842768

Abstract

Immediate early genes of herpes simplex viruses contain one or more copies of the conserved TAAT-GARAT (where R is purine) DNA motif. A virus-encoded regulatory protein (Vmw65) is believed to stimulate transcription via this element, although the protein does not bind directly to DNA. Overlapping the TAATGARAT element in many cases is an octamer sequence (ATGCAAAT) that is involved both in transcription by RNA polymerases II and III and in adenovirus DNA replication. So far at least two proteins (OTF-1 and OTF-2) have been identified that bind to the octamer. We show that both affinity-purified OTF-1 and OTF-2 bind to the TAATGARAT sequence and that Vmw65 induces the formation of an additional complex that involves OTF-1 and that is further retarded in a band-shift gel assay. Complementation experiments involving addition of purified OTF-1 to nuclear extracts that have been depleted of endogenous OTF-1 show that at least one other cellular factor(s) is required for complex formation. This cellular factor may be involved in recognition of the GARAT sequence.

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Selected References

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