5UJM

Structure of the active form of human Origin Recognition Complex and its ATPase motor module


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 18.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental
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This is version 1.2 of the entry. See complete history


Literature

Structure of the active form of human Origin Recognition Complex and its ATPase motor module.

Tocilj, A.On, K.F.Yuan, Z.Sun, J.Elkayam, E.Li, H.Stillman, B.Joshua-Tor, L.

(2017) Elife 6

  • DOI: https://doi.org/10.7554/eLife.20818
  • Primary Citation of Related Structures:  
    5UJ7, 5UJ8, 5UJM

  • PubMed Abstract: 

    Binding of the Origin Recognition Complex (ORC) to origins of replication marks the first step in the initiation of replication of the genome in all eukaryotic cells. Here, we report the structure of the active form of human ORC determined by X-ray crystallography and cryo-electron microscopy. The complex is composed of an ORC1/4/5 motor module lobe in an organization reminiscent of the DNA polymerase clamp loader complexes. A second lobe contains the ORC2/3 subunits. The complex is organized as a double-layered shallow corkscrew, with the AAA+ and AAA+-like domains forming one layer, and the winged-helix domains (WHDs) forming a top layer. CDC6 fits easily between ORC1 and ORC2, completing the ring and the DNA-binding channel, forming an additional ATP hydrolysis site. Analysis of the ATPase activity of the complex provides a basis for understanding ORC activity as well as molecular defects observed in Meier-Gorlin Syndrome mutations.


  • Organizational Affiliation

    W. M. Keck Structural Biology Laboratory, Cold Spring Harbor, New York, United States.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Origin recognition complex subunit 1522Homo sapiensMutation(s): 0 
Gene Names: ORC1ORC1LPARC1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13415 (Homo sapiens)
Explore Q13415 
Go to UniProtKB:  Q13415
PHAROS:  Q13415
GTEx:  ENSG00000085840 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13415
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Origin recognition complex subunit 2347Homo sapiensMutation(s): 0 
Gene Names: ORC2ORC2L
UniProt & NIH Common Fund Data Resources
Find proteins for Q13416 (Homo sapiens)
Explore Q13416 
Go to UniProtKB:  Q13416
PHAROS:  Q13416
GTEx:  ENSG00000115942 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13416
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Origin recognition complex subunit 3712Homo sapiensMutation(s): 0 
Gene Names: ORC3LATHEOORC3L
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UBD5 (Homo sapiens)
Explore Q9UBD5 
Go to UniProtKB:  Q9UBD5
PHAROS:  Q9UBD5
GTEx:  ENSG00000135336 
Entity Groups  
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UniProt GroupQ9UBD5
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Origin recognition complex subunit 4436Homo sapiensMutation(s): 0 
Gene Names: ORC4ORC4L
UniProt & NIH Common Fund Data Resources
Find proteins for O43929 (Homo sapiens)
Explore O43929 
Go to UniProtKB:  O43929
PHAROS:  O43929
GTEx:  ENSG00000115947 
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UniProt GroupO43929
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  • Reference Sequence
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Origin recognition complex subunit 5435Homo sapiensMutation(s): 0 
Gene Names: ORC5ORC5L
UniProt & NIH Common Fund Data Resources
Find proteins for O43913 (Homo sapiens)
Explore O43913 
Go to UniProtKB:  O43913
PHAROS:  O43913
GTEx:  ENSG00000164815 
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UniProt GroupO43913
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 18.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTUCSF Chimera1.11

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-08
    Type: Initial release
  • Version 1.1: 2018-07-18
    Changes: Data collection
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references, Derived calculations, Refinement description