2nrr

Crystal structure of the C-terminal RNAseH endonuclase domain of UvrC

spinqualitylabelsall models 2nrr, resolution 1.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2nrr is a 1 chain structure with sequence from Thermotoga maritima. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.2Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function UVRC_THEMA The UvrABC repair system catalyzes the recognition and processing of DNA lesions. UvrC both incises the 5' and 3' sides of the lesion. The N-terminal half is responsible for the 3' incision and the C-terminal half is responsible for the 5' incision (By similarity). 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 PubMed Removal and repair of DNA damage by the nucleotide excision repair pathway requires two sequential incision reactions, which are achieved by the endonuclease UvrC in eubacteria. Here, we describe the crystal structure of the C-terminal half of UvrC, which contains the catalytic domain responsible for 5' incision and a helix-hairpin-helix-domain that is implicated in DNA binding. Surprisingly, the 5' catalytic domain shares structural homology with RNase H despite the lack of sequence homology and contains an uncommon DDH triad. The structure also reveals two highly conserved patches on the surface of the protein, which are not related to the active site. Mutations of residues in one of these patches led to the inability of the enzyme to bind DNA and severely compromised both incision reactions. Based on our results, we suggest a model of how UvrC forms a productive protein-DNA complex to excise the damage from DNA. Structure of the C-terminal half of UvrC reveals an RNase H endonuclease domain with an Argonaute-like catalytic triad.,Karakas E, Truglio JJ, Croteau D, Rhau B, Wang L, Van Houten B, Kisker C EMBO J. 2007 Jan 24;26(2):613-22. PMID:17245438 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also UvrABC

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