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Yorodumi- EMDB-41254: Cryo-EM map of the Saccharomyces cerevisiae clamp unloader Elg1-R... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-41254 | ||||||||||||
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Title | Cryo-EM map of the Saccharomyces cerevisiae clamp unloader Elg1-RFC bound to PCNA | ||||||||||||
Map data | Cryo-EM map of closed PCNA clamp | ||||||||||||
Sample |
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Keywords | DNA replication / DNA sliding clamp / PCNA clamp / clamp loader/unloader / Elg1-RFC unloader / REPLICATION | ||||||||||||
Function / homology | Function and homology information DNA clamp unloading / Rad17 RFC-like complex / Gap-filling DNA repair synthesis and ligation in GG-NER / Elg1 RFC-like complex / Ctf18 RFC-like complex / DNA replication factor C complex / Polymerase switching / Translesion Synthesis by POLH / Translesion synthesis by REV1 / Translesion synthesis by POLK ...DNA clamp unloading / Rad17 RFC-like complex / Gap-filling DNA repair synthesis and ligation in GG-NER / Elg1 RFC-like complex / Ctf18 RFC-like complex / DNA replication factor C complex / Polymerase switching / Translesion Synthesis by POLH / Translesion synthesis by REV1 / Translesion synthesis by POLK / Translesion synthesis by POLI / DNA replication checkpoint signaling / Activation of ATR in response to replication stress / Termination of translesion DNA synthesis / sister chromatid cohesion / mitotic sister chromatid cohesion / leading strand elongation / DNA polymerase processivity factor activity / regulation of DNA replication / Gap-filling DNA repair synthesis and ligation in TC-NER / Dual incision in TC-NER / mismatch repair / DNA damage checkpoint signaling / DNA-templated DNA replication / DNA replication / DNA repair / ATP hydrolysis activity / DNA binding / ATP binding / nucleus / cytosol Similarity search - Function | ||||||||||||
Biological species | Saccharomyces cerevisiae (brewer's yeast) | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.25 Å | ||||||||||||
Authors | Zheng F / Yao YN / Georgescu R / O'Donnell ME / Li H | ||||||||||||
Funding support | United States, 3 items
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Citation | Journal: Sci Adv / Year: 2024 Title: Structure of the PCNA unloader Elg1-RFC. Authors: Fengwei Zheng / Nina Y Yao / Roxana E Georgescu / Huilin Li / Michael E O'Donnell / Abstract: During DNA replication, the proliferating cell nuclear antigen (PCNA) clamps are loaded onto primed sites for each Okazaki fragment synthesis by the AAA heteropentamer replication factor C (RFC). ...During DNA replication, the proliferating cell nuclear antigen (PCNA) clamps are loaded onto primed sites for each Okazaki fragment synthesis by the AAA heteropentamer replication factor C (RFC). PCNA encircling duplex DNA is quite stable and is removed from DNA by the dedicated clamp unloader Elg1-RFC. Here, we show the cryo-EM structure of Elg1-RFC in various states with PCNA. The structures reveal essential features of Elg1-RFC that explain how it is dedicated to PCNA unloading. Specifically, Elg1 contains two external loops that block opening of the Elg1-RFC complex for DNA binding, and an "Elg1 plug" domain that fills the central DNA binding chamber, thereby reinforcing the exclusive PCNA unloading activity of Elg1-RFC. Elg1-RFC was capable of unloading PCNA using non-hydrolyzable AMP-PNP. Both RFC and Elg1-RFC could remove PCNA from covalently closed circular DNA, indicating that PCNA unloading occurs by a mechanism that is distinct from PCNA loading. Implications for the PCNA unloading mechanism are discussed. | ||||||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_41254.map.gz | 267.1 MB | EMDB map data format | |
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Header (meta data) | emd-41254-v30.xml emd-41254.xml | 23.9 KB 23.9 KB | Display Display | EMDB header |
Images | emd_41254.png | 62.3 KB | ||
Filedesc metadata | emd-41254.cif.gz | 7.2 KB | ||
Others | emd_41254_half_map_1.map.gz emd_41254_half_map_2.map.gz | 262.4 MB 262.4 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-41254 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-41254 | HTTPS FTP |
-Validation report
Summary document | emd_41254_validation.pdf.gz | 1.2 MB | Display | EMDB validaton report |
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Full document | emd_41254_full_validation.pdf.gz | 1.2 MB | Display | |
Data in XML | emd_41254_validation.xml.gz | 16.6 KB | Display | |
Data in CIF | emd_41254_validation.cif.gz | 19.6 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-41254 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-41254 | HTTPS FTP |
-Related structure data
Related structure data | 8thdMC 8thbC 8thcC 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_41254.map.gz / Format: CCP4 / Size: 282.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Annotation | Cryo-EM map of closed PCNA clamp | ||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
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
-Half map: Cryo-EM map of closed PCNA clamp half-A
File | emd_41254_half_map_1.map | ||||||||||||
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Annotation | Cryo-EM map of closed PCNA clamp_half-A | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Cryo-EM map of closed PCNA clamp half-B
File | emd_41254_half_map_2.map | ||||||||||||
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Annotation | Cryo-EM map of closed PCNA clamp_half-B | ||||||||||||
Projections & Slices |
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Density Histograms |
-Sample components
+Entire : PCNA clamp unloader Elg1-RFC
+Supramolecule #1: PCNA clamp unloader Elg1-RFC
+Supramolecule #2: PCNA clamp unloader Elg1-RFC
+Supramolecule #3: PCNA clamp
+Macromolecule #1: ELG1 isoform 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: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
+Macromolecule #8: MAGNESIUM ION
+Macromolecule #9: 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 | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 1.1 µm |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: PDB ENTRY PDB model - PDB ID: |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.25 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 173929 |
Initial angle assignment | Type: ANGULAR RECONSTITUTION |
Final angle assignment | Type: ANGULAR RECONSTITUTION |