5oki | pdb_00005oki

Crystal structure of the Ctf18-1-8 module from Ctf18-RFC in complex with a 63 kDa fragment of DNA Polymerase epsilon

spinqualitylabelsall models 5oki, resolution 4.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5oki is a 8 chain structure with sequence from Saccharomyces cerevisiae S288C. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 4.5Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DPOE_YEAST DNA polymerase epsilon (DNA polymerase II) participates in chromosomal DNA replication. It is required during synthesis of the leading and lagging DNA strands at the replication fork and binds at/or near replication origins and moves along DNA with the replication fork. It has 3'-5' proofreading exonuclease activity that correct errors arising during DNA replication. It is also involved in DNA synthesis during DNA repair. Publication Abstract from PubMed Ctf18-RFC is an alternative PCNA loader which plays important but poorly understood roles in multiple DNA replication-associated processes. To fulfill its specialist roles, the Ctf18-RFC clamp loader contains a unique module in which the Dcc1-Ctf8 complex is bound to the C terminus of Ctf18 (the Ctf18-1-8 module). Here, we report the structural and functional characterization of the heterotetrameric complex formed between Ctf18-1-8 and a 63 kDa fragment of DNA polymerase varepsilon. Our data reveal that Ctf18-1-8 binds stably to the polymerase and far from its other functional sites, suggesting that Ctf18-RFC could be associated with Pol varepsilon throughout normal replication as the leading strand clamp loader. We also show that Pol varepsilon and double-stranded DNA compete to bind the same winged-helix domain on Dcc1, with Pol varepsilon being the preferred binding partner, thus suggesting that there are two alternative pathways to recruit Ctf18-RFC to sites of replication. Structural Basis for the Recruitment of Ctf18-RFC to the Replisome.,Grabarczyk DB, Silkenat S, Kisker C Structure. 2017 Dec 6. pii: S0969-2126(17)30357-X. doi:, 10.1016/j.str.2017.11.004. PMID:29225079 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also DNA polymerase 3D structures

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