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- PDB-5v8f: Structural basis of MCM2-7 replicative helicase loading by ORC-Cd... -
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Basic information
Entry | Database: PDB / ID: 5v8f | |||||||||||||||
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Title | Structural basis of MCM2-7 replicative helicase loading by ORC-Cdc6 and Cdt1 | |||||||||||||||
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![]() | REPLICATION / DNA replication / Cryo-EM / OCCM | |||||||||||||||
Function / homology | ![]() CDC6 association with the ORC:origin complex / Cul8-RING ubiquitin ligase complex / maintenance of rDNA / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / nuclear DNA replication / Assembly of the ORC complex at the origin of replication / premeiotic DNA replication ...CDC6 association with the ORC:origin complex / Cul8-RING ubiquitin ligase complex / maintenance of rDNA / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / nuclear DNA replication / Assembly of the ORC complex at the origin of replication / premeiotic DNA replication / nuclear origin of replication recognition complex / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / mitotic DNA replication / Activation of the pre-replicative complex / CMG complex / single-stranded 3'-5' DNA helicase activity / nuclear pre-replicative complex / MCM complex / Activation of ATR in response to replication stress / DNA replication preinitiation complex / replication fork protection complex / mitotic DNA replication checkpoint signaling / mitotic DNA replication initiation / double-strand break repair via break-induced replication / silent mating-type cassette heterochromatin formation / regulation of DNA-templated DNA replication initiation / single-stranded DNA helicase activity / DNA strand elongation involved in DNA replication / CDK-mediated phosphorylation and removal of Cdc6 / Orc1 removal from chromatin / DNA unwinding involved in DNA replication / regulation of DNA replication / nuclear replication fork / 3'-5' DNA helicase activity / DNA replication origin binding / subtelomeric heterochromatin formation / DNA replication initiation / heterochromatin formation / nucleosome binding / helicase activity / G1/S transition of mitotic cell cycle / chromosome / single-stranded DNA binding / DNA helicase / chromosome, telomeric region / cell division / GTPase activity / DNA damage response / chromatin binding / GTP binding / ATP hydrolysis activity / nucleoplasm / ATP binding / nucleus / metal ion binding / cytoplasm Similarity search - Function | |||||||||||||||
Biological species | ![]() ![]() synthetic construct (others) | |||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å | |||||||||||||||
![]() | Yuan, Z. / Riera, A. / Bai, L. / Sun, J. / Spanos, C. / Chen, Z.A. / Barbon, M. / Rappsilber, J. / Stillman, B. / Speck, C. / Li, H. | |||||||||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Structural basis of Mcm2-7 replicative helicase loading by ORC-Cdc6 and Cdt1. Authors: Zuanning Yuan / Alberto Riera / Lin Bai / Jingchuan Sun / Saikat Nandi / Christos Spanos / Zhuo Angel Chen / Marta Barbon / Juri Rappsilber / Bruce Stillman / Christian Speck / Huilin Li / ![]() ![]() ![]() Abstract: To initiate DNA replication, the origin recognition complex (ORC) and Cdc6 load an Mcm2-7 double hexamer onto DNA. Without ATP hydrolysis, ORC-Cdc6 recruits one Cdt1-bound Mcm2-7 hexamer, thus ...To initiate DNA replication, the origin recognition complex (ORC) and Cdc6 load an Mcm2-7 double hexamer onto DNA. Without ATP hydrolysis, ORC-Cdc6 recruits one Cdt1-bound Mcm2-7 hexamer, thus forming an ORC-Cdc6-Cdt1-Mcm2-7 (OCCM) helicase-loading intermediate. Here we report a 3.9-Å structure of Saccharomyces cerevisiae OCCM on DNA. Flexible Mcm2-7 winged-helix domains (WHDs) engage ORC-Cdc6. A three-domain Cdt1 configuration embraces Mcm2, Mcm4, and Mcm6, thus comprising nearly half of the hexamer. The Cdt1 C-terminal domain extends to the Mcm6 WHD, which binds the Orc4 WHD. DNA passes through the ORC-Cdc6 and Mcm2-7 rings. Origin DNA interaction is mediated by an α-helix within Orc4 and positively charged loops within Orc2 and Cdc6. The Mcm2-7 C-tier AAA+ ring is topologically closed by an Mcm5 loop that embraces Mcm2, but the N-tier-ring Mcm2-Mcm5 interface remains open. This structure suggests a loading mechanism of the first Cdt1-bound Mcm2-7 hexamer by ORC-Cdc6. | |||||||||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Download
PDBx/mmCIF format | ![]() | 1.3 MB | Display | ![]() |
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PDB format | ![]() | 1.1 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.6 MB | Display | ![]() |
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Full document | ![]() | 1.8 MB | Display | |
Data in XML | ![]() | 219.3 KB | Display | |
Data in CIF | ![]() | 322.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8540MC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-DNA replication licensing factor ... , 5 types, 5 molecules 23467
#1: Protein | Mass: 98911.539 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: MCM2, YBL023C, YBL0438 / Production host: ![]() ![]() |
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#2: Protein | Mass: 107653.508 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: MCM3, YEL032W, SYGP-ORF23 / Production host: ![]() ![]() |
#3: Protein | Mass: 105138.375 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: MCM4, CDC54, HCD21, YPR019W, YP9531.13 / Production host: ![]() ![]() |
#5: Protein | Mass: 113110.211 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: MCM6, YGL201C / Production host: ![]() ![]() |
#6: Protein | Mass: 90310.883 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: MCM7, CDC47, YBR202W, YBR1441 / Production host: ![]() ![]() |
-Cell division ... , 2 types, 2 molecules 89
#7: Protein | Mass: 68486.055 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: TAH11, CDT1, SID2, YJR046W, J1641 / Production host: ![]() ![]() |
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#8: Protein | Mass: 58112.367 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: CDC6, YJL194W, J0347 / Production host: ![]() ![]() |
-Origin recognition complex subunit ... , 6 types, 6 molecules ABCEDF
#9: Protein | Mass: 104433.008 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: ORC1, YML065W / Production host: ![]() ![]() |
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#10: Protein | Mass: 71342.180 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: ORC2, RRR1, SIR5, YBR060C, YBR0523 / Production host: ![]() ![]() |
#11: Protein | Mass: 72161.766 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: ORC3, OAF1, OIF1, YLL004W, L1365 / Production host: ![]() ![]() |
#12: Protein | Mass: 55347.168 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: ORC5, YNL261W, N0834 / Production host: ![]() ![]() |
#13: Protein | Mass: 60772.152 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: ORC4, YPR162C, P9325.5 / Production host: ![]() ![]() |
#14: Protein | Mass: 50369.531 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: ORC6, AAP1, YHR118C / Production host: ![]() ![]() |
-DNA chain , 2 types, 2 molecules MN
#15: DNA chain | Mass: 11967.674 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
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#16: DNA chain | Mass: 12035.815 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
-Protein / Non-polymers , 2 types, 9 molecules 5![](data/chem/img/AGS.gif)
![](data/chem/img/AGS.gif)
#17: Chemical | ChemComp-AGS / #4: Protein | | Mass: 86505.734 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: MCM5, CDC46, YLR274W, L9328.1 / Production host: ![]() ![]() |
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-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: OCCM / Type: COMPLEX / Entity ID: #1-#16 / Source: RECOMBINANT |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.4 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: C-flat |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Cs: 2.7 mm |
Specimen holder | Cryogen: NITROGEN |
Image recording | Average exposure time: 5 sec. / Electron dose: 10 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.17.1_3660: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 304288 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | Protocol: RIGID BODY FIT | ||||||||||||||||||||||||
Refine LS restraints |
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