1oyy
From Proteopedia
Structure of the RecQ Catalytic Core bound to ATP-gamma-S
Structural highlights
FunctionRECQ_ECOLI Involved in the RecF recombination pathway; its gene expression is under the regulation of the SOS system. It is a DNA helicase. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedRecQ family helicases catalyze critical genome maintenance reactions in bacterial and eukaryotic cells, playing key roles in several DNA metabolic processes. Mutations in recQ genes are linked to genome instability and human disease. To define the physical basis of RecQ enzyme function, we have determined a 1.8 A resolution crystal structure of the catalytic core of Escherichia coli RecQ in its unbound form and a 2.5 A resolution structure of the core bound to the ATP analog ATPgammaS. The RecQ core comprises four conserved subdomains; two of these combine to form its helicase region, while the others form unexpected Zn(2+)-binding and winged-helix motifs. The structures reveal the molecular basis of missense mutations that cause Bloom's syndrome, a human RecQ-associated disease. Finally, based on findings from the structures, we propose a mechanism for RecQ activity that could explain its functional coordination with topoisomerase III. High-resolution structure of the E.coli RecQ helicase catalytic core.,Bernstein DA, Zittel MC, Keck JL EMBO J. 2003 Oct 1;22(19):4910-21. PMID:14517231[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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