+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-26298 | ||||||||||||
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Title | RFC:PCNA bound to dsDNA with a ssDNA gap of six nucleotides | ||||||||||||
Map data | Density modified map | ||||||||||||
Sample |
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Keywords | sliding clamp / DNA replication&repair / AAA+ / clamp loader / BRCT domain / REPLICATION / REPLICATION-DNA complex | ||||||||||||
Function / homology | Function and homology information DNA clamp unloading / 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 / Ctf18 RFC-like complex / DNA replication factor C complex ...DNA clamp unloading / 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 / Ctf18 RFC-like complex / DNA replication factor C complex / E3 ubiquitin ligases ubiquitinate target proteins / Polymerase switching / positive regulation of DNA metabolic process / SUMOylation of DNA replication proteins / DNA clamp loader activity / maintenance of DNA trinucleotide repeats / Translesion Synthesis by POLH / Translesion synthesis by REV1 / Translesion synthesis by POLK / Translesion synthesis by POLI / PCNA complex / DNA replication checkpoint signaling / establishment of mitotic sister chromatid cohesion / Activation of ATR in response to replication stress / Termination of translesion DNA synthesis / lagging strand elongation / postreplication repair / silent mating-type cassette heterochromatin formation / sister chromatid cohesion / mitotic sister chromatid cohesion / error-free translesion synthesis / leading strand elongation / DNA polymerase processivity factor activity / Gap-filling DNA repair synthesis and ligation in TC-NER / Dual incision in TC-NER / subtelomeric heterochromatin formation / mismatch repair / translesion synthesis / positive regulation of DNA repair / DNA damage checkpoint signaling / positive regulation of DNA replication / replication fork / nucleotide-excision repair / DNA-templated DNA replication / mitotic cell cycle / chromosome, telomeric region / cell division / DNA repair / ATP hydrolysis activity / DNA binding / ATP binding / identical protein binding / nucleus / cytosol Similarity search - Function | ||||||||||||
Biological species | Saccharomyces cerevisiae (brewer's yeast) / synthetic construct (others) | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||||||||
Authors | Liu X / Gaubitz C | ||||||||||||
Funding support | United States, Switzerland, 3 items
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Citation | Journal: Elife / Year: 2022 Title: A second DNA binding site on RFC facilitates clamp loading at gapped or nicked DNA. Authors: Xingchen Liu / Christl Gaubitz / Joshua Pajak / Brian A Kelch / Abstract: Clamp loaders place circular sliding clamp proteins onto DNA so that clamp-binding partner proteins can synthesize, scan, and repair the genome. DNA with nicks or small single-stranded gaps are ...Clamp loaders place circular sliding clamp proteins onto DNA so that clamp-binding partner proteins can synthesize, scan, and repair the genome. DNA with nicks or small single-stranded gaps are common clamp-loading targets in DNA repair, yet these substrates would be sterically blocked given the known mechanism for binding of primer-template DNA. Here, we report the discovery of a second DNA binding site in the yeast clamp loader replication factor C (RFC) that aids in binding to nicked or gapped DNA. This DNA binding site is on the external surface and is only accessible in the open conformation of RFC. Initial DNA binding at this site thus provides access to the primary DNA binding site in the central chamber. Furthermore, we identify that this site can partially unwind DNA to create an extended single-stranded gap for DNA binding in RFC's central chamber and subsequent ATPase activation. Finally, we show that deletion of the BRCT domain, a major component of the external DNA binding site, results in defective yeast growth in the presence of DNA damage where nicked or gapped DNA intermediates occur. We propose that RFC's external DNA binding site acts to enhance DNA binding and clamp loading, particularly at DNA architectures typically found in DNA repair. | ||||||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_26298.map.gz | 15.9 MB | EMDB map data format | |
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Header (meta data) | emd-26298-v30.xml emd-26298.xml | 28.9 KB 28.9 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_26298_fsc.xml | 11.4 KB | Display | FSC data file |
Images | emd_26298.png | 67.4 KB | ||
Filedesc metadata | emd-26298.cif.gz | 8.2 KB | ||
Others | emd_26298_additional_1.map.gz emd_26298_half_map_1.map.gz emd_26298_half_map_2.map.gz | 96.2 MB 98 MB 98 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-26298 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-26298 | HTTPS FTP |
-Validation report
Summary document | emd_26298_validation.pdf.gz | 786.1 KB | Display | EMDB validaton report |
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Full document | emd_26298_full_validation.pdf.gz | 785.7 KB | Display | |
Data in XML | emd_26298_validation.xml.gz | 17.1 KB | Display | |
Data in CIF | emd_26298_validation.cif.gz | 22.1 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-26298 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-26298 | HTTPS FTP |
-Related structure data
Related structure data | 7u1aMC 7u19C 7u1pC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_26298.map.gz / Format: CCP4 / Size: 17.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Annotation | Density modified map | ||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. generated in cubic-lattice coordinate | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.87 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: #1
File | emd_26298_additional_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_26298_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_26298_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
+Entire : RFC bound to PCNA and DNA with a ssDNA gap of six nucleotides
+Supramolecule #1: RFC bound to PCNA and DNA with a ssDNA gap of six nucleotides
+Macromolecule #1: Replication factor C subunit 1
+Macromolecule #2: Replication factor C subunit 4
+Macromolecule #3: Replication factor C subunit 3
+Macromolecule #4: Replication factor C subunit 2
+Macromolecule #5: Replication factor C subunit 5
+Macromolecule #6: Proliferating cell nuclear antigen
+Macromolecule #7: DNA - Primer
+Macromolecule #8: DNA - Template
+Macromolecule #9: DNA - non primer
+Macromolecule #10: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
+Macromolecule #11: MAGNESIUM ION
+Macromolecule #12: ADENOSINE-5'-DIPHOSPHATE
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | TFS TALOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Average electron dose: 45.0 e/Å2 |
Electron beam | Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.0 µm |