Bacteriophage T4 proteins replicate plasmids with a preformed R loop at the T4 ori(uvsY) replication origin in vitro.

Journal Article (Journal Article)

Bacteriophage T4 DNA replication proteins catalyze complete unidirectional replication of plasmids containing the T4 ori(uvsY) replication origin in vitro, beginning with a preformed R loop at the position of the origin R loop previously identified in vivo. T4 DNA polymerase, clamp, clamp loader, and 32 protein are needed for initial elongation of the RNA, which serves as the leading-strand primer. Normal replication is dependent on T4 41 helicase and 61 primase and is strongly stimulated by the 59 helicase loading protein. 59 protein slows replication without the helicase. As expected, leading-strand synthesis stalls prematurely in the absence of T4 DNA topoisomerase. A DNA unwinding element (DUE) is essential for replication, but the ori(uvsY) DUE can be replaced by other DUE sequences.

Full Text

Duke Authors

Cited Authors

  • Nossal, NG; Dudas, KC; Kreuzer, KN

Published Date

  • January 2001

Published In

Volume / Issue

  • 7 / 1

Start / End Page

  • 31 - 41

PubMed ID

  • 11172709

International Standard Serial Number (ISSN)

  • 1097-2765

Digital Object Identifier (DOI)

  • 10.1016/s1097-2765(01)00152-6


  • eng

Conference Location

  • United States