2mc3 | pdb_00002mc3

NMR solution structure of the winged-helix domain from MUS81 structure-specific endonuclease

spinqualitylabelsall models 2mc3, 20 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2mc3 is a 1 chain structure with sequence from Human. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: hCG_23303, MUS81 (HUMAN) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The MUS81-EME1 endonuclease maintains metazoan genomic integrity by cleaving branched DNA structures that arise during the resolution of recombination intermediates. In humans, MUS81 also forms a poorly characterized complex with EME2. Here, we identify and determine the structure of a winged helix (WH) domain from human MUS81, which binds DNA. WH domain mutations greatly reduce binding of the isolated domain to DNA and impact on incision activity of MUS81-EME1/EME2 complexes. Deletion of the WH domain reduces the endonuclease activity of both MUS81-EME1 and MUS81-EME2 complexes, and incisions made by MUS81-EME2 are made closer to the junction on substrates containing a downstream duplex, such as fork structures and nicked Holliday junctions. WH domain mutation or deletion in Schizosaccharomyces pombe phenocopies the DNA-damage sensitivity of strains deleted for mus81. Our results indicate an important role for the WH domain in both yeast and human MUS81 complexes. A winged helix domain in human MUS81 binds DNA and modulates the endonuclease activity of MUS81 complexes.,Fadden AJ, Schalbetter S, Bowles M, Harris R, Lally J, Carr AM, McDonald NQ Nucleic Acids Res. 2013 Aug 27. PMID:23982516 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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