Major domain swiveling revealed by the crystal structures of complexes of e. coli rep helicase bound to single-stranded DNA and ADP

Korolev, S. and Hsieh, J. and Gauss, G.H. and Lohman, T.M. and Waksman, Gabriel (1997) Major domain swiveling revealed by the crystal structures of complexes of e. coli rep helicase bound to single-stranded DNA and ADP. Cell 90 (4), pp. 635-647. ISSN 0092-8674.

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Official URL: https://doi.org/10.1016/S0092-8674(00)80525-5

Abstract

Crystal structures of binary and ternary complexes of the E. coli Rep helicase bound to single-stranded (ss) DNA or ssDNA and ADP were determined to a resolution of 3.0 Å and 3.2 Å, respectively. The asymmetric unit in the crystals contains two Rep monomers differing from each other by a large reorientation of one of the domains, corresponding to a swiveling of 130° about a hinge region. Such domain movements are sufficiently large to suggest that these may be coupled to translocation of the Rep dimer along DNA. The ssDNA binding site involves the helicase motifs Ia, III, and V, whereas the ADP binding site involves helicase motifs I and IV. Residues in motifs II and VI may function to transduce the allosteric effects of nucleotides on DNA binding. These structures represent the first view of a DNA helicase bound to DNA.

Metadata

Item Type:	Article
School:	Birkbeck Faculties and Schools > Faculty of Science > School of Natural Sciences
Depositing User:	Sarah Hall
Date Deposited:	29 Apr 2019 15:29
Last Modified:	02 Aug 2023 17:51
URI:	https://eprints.bbk.ac.uk/id/eprint/27350

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