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Synergistic effect of ATP for RuvA-RuvB-Holliday junction DNA complex formation.

ABSTRACT: The Escherichia coli RuvB hexameric ring motor proteins, together with RuvAs, promote branch migration of Holliday junction DNA. Zero mode waveguides (ZMWs) constitute of nanosized holes and enable the visualization of a single fluorescent molecule under micromolar order of the molecules, which is applicable to characterize the formation of RuvA-RuvB-Holliday junction DNA complex. In this study, we used ZMWs and counted the number of RuvBs binding to RuvA-Holliday junction DNA complex. Our data demonstrated that different nucleotide analogs increased the amount of Cy5-RuvBs binding to RuvA-Holliday junction DNA complex in the following order: no nucleotide, ADP, ATP?S, and mixture of ADP and ATP?S. These results suggest that not only ATP binding to RuvB but also ATP hydrolysis by RuvB facilitates a stable RuvA-RuvB-Holliday junction DNA complex formation.

SUBMITTER: Iwasa T

PROVIDER: S-EPMC4677358 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature

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Synergistic effect of ATP for RuvA-RuvB-Holliday junction DNA complex formation.

Iwasa Takuma T Han Yong-Woon YW Hiramatsu Ryo R Yokota Hiroaki H Nakao Kimiko K Yokokawa Ryuji R Ono Teruo T Harada Yoshie Y

Scientific reports 20151214

The Escherichia coli RuvB hexameric ring motor proteins, together with RuvAs, promote branch migration of Holliday junction DNA. Zero mode waveguides (ZMWs) constitute of nanosized holes and enable the visualization of a single fluorescent molecule under micromolar order of the molecules, which is applicable to characterize the formation of RuvA-RuvB-Holliday junction DNA complex. In this study, we used ZMWs and counted the number of RuvBs binding to RuvA-Holliday junction DNA complex. Our data ...[more]

PMID: 26658024

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