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1sxj
From Proteopedia
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[[Image:1sxj.gif|left|200px]] | [[Image:1sxj.gif|left|200px]] | ||
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'''Crystal Structure of the Eukaryotic Clamp Loader (Replication Factor C, RFC) Bound to the DNA Sliding Clamp (Proliferating Cell Nuclear Antigen, PCNA)''' | '''Crystal Structure of the Eukaryotic Clamp Loader (Replication Factor C, RFC) Bound to the DNA Sliding Clamp (Proliferating Cell Nuclear Antigen, PCNA)''' | ||
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[[Category: Donnell, M O.]] | [[Category: Donnell, M O.]] | ||
[[Category: Kuriyan, J.]] | [[Category: Kuriyan, J.]] | ||
| - | [[Category: | + | [[Category: Aaa+ atpase]] |
| - | [[Category: | + | [[Category: Clamp loader]] |
| - | [[Category: | + | [[Category: Dna polymerase]] |
| - | [[Category: | + | [[Category: Dna sliding clamp]] |
| - | [[Category: | + | [[Category: Dna-binding protein]] |
| - | [[Category: | + | [[Category: Processivity clamp]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 09:15:05 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 06:15, 3 May 2008
Crystal Structure of the Eukaryotic Clamp Loader (Replication Factor C, RFC) Bound to the DNA Sliding Clamp (Proliferating Cell Nuclear Antigen, PCNA)
Overview
Sliding clamps are ring-shaped proteins that encircle DNA and confer high processivity on DNA polymerases. Here we report the crystal structure of the five-protein clamp loader complex (replication factor-C, RFC) of the yeast Saccharomyces cerevisiae, bound to the sliding clamp (proliferating cell nuclear antigen, PCNA). Tight interfacial coordination of the ATP analogue ATP-gammaS by RFC results in a spiral arrangement of the ATPase domains of the clamp loader above the PCNA ring. Placement of a model for primed DNA within the central hole of PCNA reveals a striking correspondence between the RFC spiral and the grooves of the DNA double helix. This model, in which the clamp loader complex locks onto primed DNA in a screw-cap-like arrangement, provides a simple explanation for the process by which the engagement of primer-template junctions by the RFC:PCNA complex results in ATP hydrolysis and release of the sliding clamp on DNA.
About this Structure
1SXJ is a Protein complex structure of sequences from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
Reference
Structural analysis of a eukaryotic sliding DNA clamp-clamp loader complex., Bowman GD, O'Donnell M, Kuriyan J, Nature. 2004 Jun 17;429(6993):724-30. PMID:15201901 Page seeded by OCA on Sat May 3 09:15:05 2008
