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- PDB-7ctf: Human origin recognition complex 1-5 State II -

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Basic information

Entry
Database: PDB / ID: 7ctf
TitleHuman origin recognition complex 1-5 State II
Components(Origin recognition complex subunit ...) x 5
KeywordsREPLICATION / DNA replication initiation / Origin recognition complex (ORC) / cryo-EM / autoinhibition conformation
Function / homology
Function and homology information


polar body extrusion after meiotic divisions / CDC6 association with the ORC:origin complex / origin recognition complex / E2F-enabled inhibition of pre-replication complex formation / nuclear origin of replication recognition complex / inner kinetochore / nuclear pre-replicative complex / DNA replication preinitiation complex / mitotic DNA replication checkpoint signaling / neural precursor cell proliferation ...polar body extrusion after meiotic divisions / CDC6 association with the ORC:origin complex / origin recognition complex / E2F-enabled inhibition of pre-replication complex formation / nuclear origin of replication recognition complex / inner kinetochore / nuclear pre-replicative complex / DNA replication preinitiation complex / mitotic DNA replication checkpoint signaling / neural precursor cell proliferation / G1/S-Specific Transcription / regulation of DNA replication / DNA replication origin binding / protein polymerization / DNA replication initiation / Activation of the pre-replicative complex / glial cell proliferation / Activation of ATR in response to replication stress / heterochromatin / Assembly of the ORC complex at the origin of replication / Assembly of the pre-replicative complex / Orc1 removal from chromatin / chromosome, telomeric region / DNA replication / nuclear body / nucleotide binding / centrosome / chromatin binding / chromatin / nucleolus / negative regulation of transcription by RNA polymerase II / ATP hydrolysis activity / DNA binding / nucleoplasm / ATP binding / metal ion binding / nucleus / membrane / cytosol
Similarity search - Function
Origin recognition complex subunit 3, insertion domain / Origin recognition complex subunit 3 insertion domain / CDC6, C terminal / Cdc6, C-terminal / CDC6, C terminal winged helix domain / Origin recognition complex subunit 4 / Origin recognition complex, subunit 3 / Origin recognition complex, subunit 5 / Origin recognition complex subunit 4, C-terminal / Origin recognition complex subunit 3, winged helix C-terminal ...Origin recognition complex subunit 3, insertion domain / Origin recognition complex subunit 3 insertion domain / CDC6, C terminal / Cdc6, C-terminal / CDC6, C terminal winged helix domain / Origin recognition complex subunit 4 / Origin recognition complex, subunit 3 / Origin recognition complex, subunit 5 / Origin recognition complex subunit 4, C-terminal / Origin recognition complex subunit 3, winged helix C-terminal / Origin recognition complex subunit 3, N-terminal / : / : / Origin recognition complex (ORC) subunit 3 N-terminus / Origin recognition complex (ORC) subunit 4 C-terminus / Origin recognition complex (ORC) subunit 5 C-terminus / Origin recognition complex winged helix C-terminal / ORC5, lid domain / Orc1-like, AAA ATPase domain / : / : / Origin recognition complex subunit 2 RecA-like domain / ORC2 WHD / AAA ATPase domain / Origin recognition complex, subunit 2 / AAA lid domain / AAA lid domain / : / Bromo adjacent homology domain / BAH domain / Bromo adjacent homology (BAH) domain / Bromo adjacent homology (BAH) domain superfamily / BAH domain profile. / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ADENOSINE-5'-TRIPHOSPHATE / Origin recognition complex subunit 5 / Origin recognition complex subunit 4 / Origin recognition complex subunit 1 / Origin recognition complex subunit 2 / Origin recognition complex subunit 3
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.8 Å
AuthorsCheng, J. / Li, N. / Wang, X. / Hu, J. / Zhai, Y. / Gao, N.
Funding support China, 1items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2019YFA0508904 China
CitationJournal: Cell Discov / Year: 2020
Title: Structural insight into the assembly and conformational activation of human origin recognition complex.
Authors: Jiaxuan Cheng / Ningning Li / Xiaohan Wang / Jiazhi Hu / Yuanliang Zhai / Ning Gao /
Abstract: The function of the origin recognition complex (ORC) in DNA replication is highly conserved in recognizing and marking the initiation sites. The detailed molecular mechanisms by which human ORC is ...The function of the origin recognition complex (ORC) in DNA replication is highly conserved in recognizing and marking the initiation sites. The detailed molecular mechanisms by which human ORC is reconfigured into a state competent for origin association remain largely unknown. Here, we present structural characterizations of human ORC1-5 and ORC2-5 assemblies. ORC2-5 exhibits a tightly autoinhibited conformation with the winged-helix domain of ORC2 completely blocking the central DNA-binding channel. The binding of ORC1 partially relieves the autoinhibitory effect of ORC2-5 through remodeling ORC2-WHD, which makes ORC2-WHD away from the central channel creating a still autoinhibited but more dynamic structure. In particular, the AAA+ domain of ORC1 is highly flexible to sample a variety of conformations from inactive to potentially active states. These results provide insights into the detailed mechanisms regulating the autoinhibition of human ORC and its subsequent activation for DNA binding.
History
DepositionAug 18, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jan 6, 2021Provider: repository / Type: Initial release
Revision 1.0Jan 6, 2021Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jan 6, 2021Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jan 6, 2021Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Jan 6, 2021Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jan 6, 2021Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Mar 27, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.2Jul 2, 2025Group: Data collection / Structure summary / Category: em_admin / em_software / pdbx_entry_details
Item: _em_admin.last_update / _em_software.name / _pdbx_entry_details.has_protein_modification
Revision 1.1Jul 2, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

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Assembly

Deposited unit
A: Origin recognition complex subunit 1
B: Origin recognition complex subunit 2
C: Origin recognition complex subunit 3
D: Origin recognition complex subunit 4
E: Origin recognition complex subunit 5
hetero molecules


Theoretical massNumber of molelcules
Total (without water)347,7367
Polymers346,7215
Non-polymers1,0142
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: equilibrium centrifugation
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area22130 Å2
ΔGint-102 kcal/mol
Surface area81900 Å2

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Components

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Origin recognition complex subunit ... , 5 types, 5 molecules ABCDE

#1: Protein Origin recognition complex subunit 1 / Replication control protein 1


Mass: 97499.867 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ORC1, ORC1L, PARC1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q13415
#2: Protein Origin recognition complex subunit 2


Mass: 66063.375 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ORC2, ORC2L / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q13416
#3: Protein Origin recognition complex subunit 3 / Origin recognition complex subunit Latheo


Mass: 82365.055 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ORC3, LATHEO, ORC3L / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q9UBD5
#4: Protein Origin recognition complex subunit 4


Mass: 50443.266 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ORC4, ORC4L / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: O43929
#5: Protein Origin recognition complex subunit 5


Mass: 50349.934 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ORC5, ORC5L / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: O43913

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Non-polymers , 1 types, 2 molecules

#6: Chemical ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE


Mass: 507.181 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Feature type: SUBJECT OF INVESTIGATION / Comment: ATP, energy-carrying molecule*YM

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Details

Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Human Origin Recognition Complex 1-5 / Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.6
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 65 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: dev_3689: / Classification: refinement
EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 627000 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00814803
ELECTRON MICROSCOPYf_angle_d1.3620035
ELECTRON MICROSCOPYf_dihedral_angle_d24.8275504
ELECTRON MICROSCOPYf_chiral_restr0.0632295
ELECTRON MICROSCOPYf_plane_restr0.0082524

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