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Abstract
During homologous recombination in Escherichia coli the RuvA, B and C proteins interact specifically with the Holliday junction formed by the action of RecA to promote the strand-exchange reaction. RuvA, a homotetrameric protein of molecular weight 88 kDa, has been overexpressed in E. coli, purified and co-crystallized with a synthetic Holliday junction substrate made from four 18-base deoxyoligonucleotides. Crystals were grown using the hanging-drop vapour-diffusion method with sodium acetate as the precipitant. The crystals diffract to a resolution of 6 A and belong to the monoclinic system, space group C2, with cell parameters a = 148, b = 148, c = 106 A and beta = 123 degrees. The X-ray analysis of these crystals should reveal the structure of the Holliday junction and its mode of binding to RuvA, providing new insights into the molecular mechanism of genetic recombination.
Published Version
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Schedule a callMore From: Acta crystallographica. Section D, Biological crystallography
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