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Open data
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Basic information
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Title | Yeast replisome in state IV | |||||||||||||||||||||||||||
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![]() | replisome / complex / DNA replication / REPLICATION | |||||||||||||||||||||||||||
Function / homology | ![]() establishment of sister chromatid cohesion / DNA-templated DNA replication maintenance of fidelity / Unwinding of DNA / Cul8-RING ubiquitin ligase complex / DNA replication initiation / epsilon DNA polymerase complex / DNA strand elongation involved in mitotic DNA replication / GINS complex / MCM core complex / Assembly of the pre-replicative complex ...establishment of sister chromatid cohesion / DNA-templated DNA replication maintenance of fidelity / Unwinding of DNA / Cul8-RING ubiquitin ligase complex / DNA replication initiation / epsilon DNA polymerase complex / DNA strand elongation involved in mitotic DNA replication / GINS complex / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / mitotic DNA replication preinitiation complex assembly / nuclear DNA replication / premeiotic DNA replication / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / Activation of the pre-replicative complex / mitotic DNA replication / CMG complex / nuclear pre-replicative complex / Activation of ATR in response to replication stress / Termination of translesion DNA synthesis / DNA replication preinitiation complex / MCM complex / replication fork protection complex / double-strand break repair via break-induced replication / single-stranded DNA helicase activity / mitotic DNA replication initiation / silent mating-type cassette heterochromatin formation / regulation of DNA-templated DNA replication initiation / 3'-5' DNA helicase activity / mitotic sister chromatid cohesion / nuclear chromosome / DNA strand elongation involved in DNA replication / nuclear replication fork / : / DNA replication origin binding / Dual incision in TC-NER / DNA replication initiation / error-prone translesion synthesis / subtelomeric heterochromatin formation / forked DNA-dependent helicase activity / single-stranded 3'-5' DNA helicase activity / four-way junction helicase activity / double-stranded DNA helicase activity / helicase activity / transcription elongation by RNA polymerase II / DNA-templated DNA replication / heterochromatin formation / nucleosome assembly / mitotic cell cycle / single-stranded DNA binding / chromatin extrusion motor activity / ATP-dependent H2AZ histone chaperone activity / ATP-dependent H3-H4 histone complex chaperone activity / DNA helicase / cohesin loader activity / DNA clamp loader activity / chromosome, telomeric region / hydrolase activity / DNA repair / chromatin binding / ATP hydrolysis activity / DNA binding / nucleoplasm / ATP binding / identical protein binding / nucleus / metal ion binding / cytoplasm Similarity search - Function | |||||||||||||||||||||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 7.39 Å | |||||||||||||||||||||||||||
![]() | Dang S / Zhai Y / Feng J / Yu D | |||||||||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Synergism between CMG helicase and leading strand DNA polymerase at replication fork. Authors: Zhichun Xu / Jianrong Feng / Daqi Yu / Yunjing Huo / Xiaohui Ma / Wai Hei Lam / Zheng Liu / Xiang David Li / Toyotaka Ishibashi / Shangyu Dang / Yuanliang Zhai / ![]() Abstract: The replisome that replicates the eukaryotic genome consists of at least three engines: the Cdc45-MCM-GINS (CMG) helicase that separates duplex DNA at the replication fork and two DNA polymerases, ...The replisome that replicates the eukaryotic genome consists of at least three engines: the Cdc45-MCM-GINS (CMG) helicase that separates duplex DNA at the replication fork and two DNA polymerases, one on each strand, that replicate the unwound DNA. Here, we determined a series of cryo-electron microscopy structures of a yeast replisome comprising CMG, leading-strand polymerase Polε and three accessory factors on a forked DNA. In these structures, Polε engages or disengages with the motor domains of the CMG by occupying two alternative positions, which closely correlate with the rotational movement of the single-stranded DNA around the MCM pore. During this process, the polymerase remains stably coupled to the helicase using Psf1 as a hinge. This synergism is modulated by a concerted rearrangement of ATPase sites to drive DNA translocation. The Polε-MCM coupling is not only required for CMG formation to initiate DNA replication but also facilitates the leading-strand DNA synthesis mediated by Polε. Our study elucidates a mechanism intrinsic to the replisome that coordinates the activities of CMG and Polε to negotiate any roadblocks, DNA damage, and epigenetic marks encountered during translocation along replication forks. | |||||||||||||||||||||||||||
History |
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Structure visualization
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Downloads & links
-EMDB archive
Map data | ![]() | 306.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 44.5 KB 44.5 KB | Display Display | ![]() |
Images | ![]() | 100 KB | ||
Masks | ![]() | 325 MB | ![]() | |
Filedesc metadata | ![]() | 12.8 KB | ||
Others | ![]() ![]() | 301.9 MB 301.9 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 1.2 MB | Display | ![]() |
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Full document | ![]() | 1.2 MB | Display | |
Data in XML | ![]() | 16.9 KB | Display | |
Data in CIF | ![]() | 20 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8w7sMC ![]() 8kg6C ![]() 8kg8C ![]() 8kg9C ![]() 8w7mC C: citing same article ( M: atomic model generated by this map |
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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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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.06 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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-Half map: #2
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Density Histograms |
-Half map: #1
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Density Histograms |
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Sample components
+Entire : replisome complex in state IV
+Supramolecule #1: replisome complex in state IV
+Macromolecule #1: DNA replication licensing factor MCM2
+Macromolecule #2: DNA replication licensing factor MCM3
+Macromolecule #3: DNA replication licensing factor MCM4
+Macromolecule #4: Minichromosome maintenance protein 5
+Macromolecule #5: DNA replication licensing factor MCM6
+Macromolecule #6: DNA replication licensing factor MCM7
+Macromolecule #7: DNA replication complex GINS protein PSF1
+Macromolecule #8: DNA replication complex GINS protein PSF2
+Macromolecule #9: DNA replication complex GINS protein PSF3
+Macromolecule #10: DNA replication complex GINS protein SLD5
+Macromolecule #11: Cell division control protein 45
+Macromolecule #12: DNA polymerase alpha-binding protein
+Macromolecule #14: DNA polymerase epsilon subunit B
+Macromolecule #13: DNA (71-mer)
-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: 7.6 Component:
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Grid | Model: C-flat-1.2/1.3 / Material: GOLD / Mesh: 300 | |||||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV Details: blot with filter paper for 3-4 seconds before plunging.. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 4 / Number real images: 21776 / Average exposure time: 4.5 sec. / Average electron dose: 53.0 e/Å2 Details: Images were collected in movie-mode containing 40 frames. |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 81000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
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 | Number classes used: 1 / Applied symmetry - Point group: C1 (asymmetric) / Algorithm: EXACT BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 7.39 Å / Resolution method: FSC 0.143 CUT-OFF Software: (Name: cryoSPARC (ver. v3.0.1), cryoSPARC (ver. v2.15.0)) Number images used: 7939 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD Software: (Name: cryoSPARC (ver. v3.0.1), cryoSPARC (ver. v2.15.0)) |
Final angle assignment | Type: MAXIMUM LIKELIHOOD Software: (Name: cryoSPARC (ver. v3.0.1), cryoSPARC (ver. v2.15.0)) |