5UJ7

Structure of the active form of human Origin Recognition Complex ATPase motor module, complex subunitS 1, 4, 5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.39 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.245 

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

  • 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 ...

    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

    Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, United States.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Origin recognition complex subunit 1A, D [auth B]391Homo 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
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Origin recognition complex subunit 4B [auth C], E [auth D]436Homo 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
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Origin recognition complex subunit 5C [auth E], F284Homo 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
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.39 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.245 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 120.887α = 90
b = 81.141β = 97.25
c = 151.947γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-08
    Type: Initial release
  • Version 1.1: 2017-09-20
    Changes: Author supporting evidence, Derived calculations
  • Version 1.2: 2019-11-20
    Changes: Author supporting evidence