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Open data
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Basic information
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Title | Cryo-EM structure of S. cerevisiae Ctf18-RFC-PCNA-DNA complex | ||||||||||||
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![]() | Ctf18 / RFC2-5 / PCNA / DNA / DNA BINDING PROTEIN-DNA complex | ||||||||||||
Function / homology | ![]() positive regulation of DNA metabolic process / Rad17 RFC-like complex / Mismatch repair (MMR) directed by MSH2:MSH6 (MutSalpha) / Gap-filling DNA repair synthesis and ligation in GG-NER / meiotic mismatch repair / Processive synthesis on the lagging strand / Elg1 RFC-like complex / Removal of the Flap Intermediate / DNA replication factor C complex / telomere tethering at nuclear periphery ...positive regulation of DNA metabolic process / Rad17 RFC-like complex / Mismatch repair (MMR) directed by MSH2:MSH6 (MutSalpha) / Gap-filling DNA repair synthesis and ligation in GG-NER / meiotic mismatch repair / Processive synthesis on the lagging strand / Elg1 RFC-like complex / Removal of the Flap Intermediate / DNA replication factor C complex / telomere tethering at nuclear periphery / Ctf18 RFC-like complex / Polymerase switching / E3 ubiquitin ligases ubiquitinate target proteins / maintenance of DNA trinucleotide repeats / SUMOylation of DNA replication proteins / Translesion synthesis by REV1 / Translesion synthesis by POLK / Translesion synthesis by POLI / Translesion Synthesis by POLH / DNA replication checkpoint signaling / establishment of mitotic sister chromatid cohesion / Termination of translesion DNA synthesis / Activation of ATR in response to replication stress / PCNA complex / lagging strand elongation / postreplication repair / sister chromatid cohesion / silent mating-type cassette heterochromatin formation / mitotic sister chromatid cohesion / error-free translesion synthesis / DNA polymerase processivity factor activity / leading strand elongation / Gap-filling DNA repair synthesis and ligation in TC-NER / nuclear replication fork / Dual incision in TC-NER / DNA replication initiation / translesion synthesis / subtelomeric heterochromatin formation / mismatch repair / positive regulation of DNA repair / DNA damage checkpoint signaling / positive regulation of DNA replication / replication fork / double-strand break repair via homologous recombination / nucleotide-excision repair / DNA-templated DNA replication / mitotic cell cycle / chromosome, telomeric region / DNA repair / ATP hydrolysis activity / mitochondrion / DNA binding / ATP binding / identical protein binding / nucleus / cytosol Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.2 Å | ||||||||||||
![]() | Yuan Z / Georgescu R / O'Donnell M / Li H | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Mechanism of PCNA loading by Ctf18-RFC for leading-strand DNA synthesis. Authors: Zuanning Yuan / Roxana Georgescu / Nina Y Yao / Olga Yurieva / Michael E O'Donnell / Huilin Li / ![]() Abstract: The proliferating cell nuclear antigen (PCNA) clamp encircles DNA to hold DNA polymerases (Pols) to DNA for processivity. The Ctf18-RFC PCNA loader, a replication factor C (RFC) variant, is specific ...The proliferating cell nuclear antigen (PCNA) clamp encircles DNA to hold DNA polymerases (Pols) to DNA for processivity. The Ctf18-RFC PCNA loader, a replication factor C (RFC) variant, is specific to the leading-strand Pol (Polε). We reveal here the underlying mechanism of Ctf18-RFC specificity to Polε using cryo-electron microscopy and biochemical studies. We found that both Ctf18-RFC and Polε contain specific structural features that direct PCNA loading onto DNA. Unlike other clamp loaders, Ctf18-RFC has a disordered ATPase associated with a diverse cellular activities (AAA+) motor that requires Polε to bind and stabilize it for efficient PCNA loading. In addition, Ctf18-RFC can pry prebound Polε off of DNA, then load PCNA onto DNA and transfer the PCNA-DNA back to Polε. These elements in both Ctf18-RFC and Polε provide specificity in loading PCNA onto DNA for Polε. | ||||||||||||
History |
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Structure visualization
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Downloads & links
-EMDB archive
Map data | ![]() | 8.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 23.4 KB 23.4 KB | Display Display | ![]() |
Images | ![]() | 183.1 KB | ||
Filedesc metadata | ![]() | 7.3 KB | ||
Others | ![]() ![]() | 59.5 MB 59.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 807.1 KB | Display | ![]() |
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Full document | ![]() | 806.7 KB | Display | |
Data in XML | ![]() | 12.4 KB | Display | |
Data in CIF | ![]() | 14.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8twbM ![]() 9b8rC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 0.828 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Ctf18-RFC-PCNA complex
+Supramolecule #1: Ctf18-RFC-PCNA complex
+Macromolecule #1: Replication factor C subunit 4
+Macromolecule #2: Replication factor C subunit 3
+Macromolecule #3: Replication factor C subunit 2
+Macromolecule #4: Replication factor C subunit 5
+Macromolecule #5: Chromosome transmission fidelity protein 18
+Macromolecule #6: Proliferating cell nuclear antigen
+Macromolecule #7: Template DNA
+Macromolecule #8: Primer DNA
+Macromolecule #9: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
+Macromolecule #10: MAGNESIUM ION
+Macromolecule #11: ADENOSINE-5'-DIPHOSPHATE
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.5 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: NONE |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 115411 |
Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: PROJECTION MATCHING |