5x4h

The crystal structure of Pyrococcus furiosus RecJ (wild-type)

spinqualitylabelsall models 5x4h, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5x4h is a 1 chain structure with sequence from Pyrococcus furiosus DSM 3638. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.801Å Ligands: MG, MSE Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8TZE0_PYRFU Publication Abstract from PubMed RecJ nucleases specifically degrade single-stranded (ss) DNA in the 5' to 3' direction. Archaeal RecJ is different from bacterial RecJ in sequence, domain organization, and substrate specificity. The RecJ from archaea Pyrococcus furiosus (PfuRecJ) also hydrolyzes RNA strands in the 3' to 5' direction. Like eukaryotic Cdc45 protein, archaeal RecJ forms a complex with MCM helicase and GINS. Here, we report the crystal structures of PfuRecJ and the complex of PfuRecJ and two CMPs. PfuRecJ bind one or two divalent metal ions in its crystal structure. A channel consisting of several positively charged residues is identified in the complex structure, and might be responsible for binding substrate ssDNA and/or releasing single nucleotide products. The deletion of the complex interaction domain (CID) increases the values of kcat/Km of 5' exonuclease activity on ssDNA and 3' exonuclease activity on ssRNA by 5- and 4-fold, respectively, indicating that the CID functions as a regulator of enzymatic activity. The DHH domain of PfuRecJ interacts with the C-terminal beta-sheet domain of the GINS51 subunit in the tetrameric GINS complex. The relationship of archaeal and bacterial RecJs, as well as eukaryotic Cdc45, is discussed based on biochemical and structural results. The crystal structure of Pyrococcus furiosus RecJ implicates it as an ancestor of eukaryotic Cdc45.,Li MJ, Yi GS, Yu F, Zhou H, Chen JN, Xu CY, Wang FP, Xiao X, He JH, Liu XP Nucleic Acids Res. 2017 Dec 1;45(21):12551-12564. doi: 10.1093/nar/gkx887. PMID:30053256 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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