6t7y | pdb_00006t7y

Structure of PCNA bound to cPIP motif of DP2 from P. abyssi

spinqualitylabelsall models 6t7y, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6t7y is a 2 chain structure with sequence from "pyrococcus_abyssi"_erauso_et_al._1993 "pyrococcus abyssi" erauso et al. 1993 and Pyrab. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: pcn, PYRAB13790, PAB1465 (PYRAB) Activity: DNA-directed DNA polymerase, with EC number 2.7.7.7 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [PCNA_PYRAB] Sliding clamp subunit that acts as a moving platform for DNA processing. Responsible for tethering the catalytic subunit of DNA polymerase and other proteins to DNA during high-speed replication (By similarity). Regulates activity of NucS endonuclease and prevents non-specific cleavage.[HAMAP-Rule:MF_00317] Publication Abstract from PubMed Replicative DNA polymerases (DNAPs) have evolved the ability to copy the genome with high processivity and fidelity. In Eukarya and Archaea, the processivity of replicative DNAPs is greatly enhanced by its binding to the proliferative cell nuclear antigen (PCNA) that encircles the DNA. We determined the cryo-EM structure of the DNA-bound PolD-PCNA complex from Pyrococcus abyssi at 3.77 A. Using an integrative structural biology approach - combining cryo-EM, X-ray crystallography, protein-protein interaction measurements, and activity assays - we describe the molecular basis for the interaction and cooperativity between a replicative DNAP and PCNA. PolD recruits PCNA via a complex mechanism, which requires two different PIP-boxes. We infer that the second PIP-box, which is shared with the eukaryotic Polalpha replicative DNAP, plays a dual role in binding either PCNA or primase, and could be a master switch between an initiation and a processive phase during replication. Structural basis for the increased processivity of D-family DNA polymerases in complex with PCNA.,Madru C, Henneke G, Raia P, Hugonneau-Beaufet I, Pehau-Arnaudet G, England P, Lindahl E, Delarue M, Carroni M, Sauguet L Nat Commun. 2020 Mar 27;11(1):1591. doi: 10.1038/s41467-020-15392-9. PMID:32221299 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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