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Unwinding of a Herpes Simplex Virus Type 1 Origin of Replication (OriS) by a Complex of the Viral Origin Binding Protein and the Single-Stranded DNA Binding Protein

By Xiaodun He and I. R. Lehman

Abstract

A herpes simplex virus type 1 (HSV-1) OriS analogue in which the A+T sequence linking the box I and II elements was replaced by two single-stranded oligo(dT)s is unwound by the UL9 protein-ICP8 complex. Unwinding of wild-type OriS by the UL9 protein-ICP8 complex was also observed under conditions which destabilize the A+T sequence. These experiments support a model for the unwinding of OriS in which destabilization of the A+T sequence can generate a single-stranded DNA binding site for ICP8, which then associates with the UL9 protein bound to boxes I and II to promote the bidirectional unwinding of OriS

Topics: Replication
Publisher: American Society for Microbiology
Year: 2000
OAI identifier: oai:pubmedcentral.nih.gov:112062
Provided by: PubMed Central
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