1b77
BUILDING A REPLISOME STRUCTURE FROM INTERACTING PIECES: A SLIDING CLAMP COMPLEXED WITH AN INTERACTION PEPTIDE FROM DNA POLYMERASE
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| , resolution 2.10Å | |||||||
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| Gene: | GENE 45 (Enterobacteria phage RB69) | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
OverviewOverview
We have solved the crystal structures of the bacteriophage RB69 sliding clamp, its complex with a peptide essential for DNA polymerase interactions, and the DNA polymerase complexed with primer-template DNA. The editing complex structure shows a partially melted duplex DNA exiting from the exonuclease domain at an unexpected angle and significant changes in the protein structure. The clamp complex shows the C-terminal 11 residues of polymerase bound in a hydrophobic pocket, and it allows docking of the editing and clamp structures together. The peptide binds to the sliding clamp at a position identical to that of a replication inhibitor peptide bound to PCNA, suggesting that the replication inhibitor protein p21CIP1 functions by competing with eukaryotic polymerases for the same binding pocket on the clamp.
About this StructureAbout this Structure
1B77 is a Single protein structure of sequence from Enterobacteria phage rb69. Full crystallographic information is available from OCA.
ReferenceReference
Building a replisome from interacting pieces: sliding clamp complexed to a peptide from DNA polymerase and a polymerase editing complex., Shamoo Y, Steitz TA, Cell. 1999 Oct 15;99(2):155-66. PMID:10535734
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