5UJ8

Human Origin Recognition Complex subunits 2 and 3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 6 Å
  • R-Value Free: 0.368 
  • R-Value Work: 0.318 

wwPDB Validation 3D Report Full Report


This is version 1.0 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:  5UJ7, 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 c ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Origin recognition complex subunit 3
A, B, C, D
712Homo sapiensGene Names: ORC3 (LATHEO, ORC3L)
Find proteins for Q9UBD5 (Homo sapiens)
Go to Gene View: ORC3
Go to UniProtKB:  Q9UBD5
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Origin recognition complex subunit 2
E, F, G, H
347Homo sapiensGene Names: ORC2 (ORC2L)
Find proteins for Q13416 (Homo sapiens)
Go to Gene View: ORC2
Go to UniProtKB:  Q13416
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 6 Å
  • R-Value Free: 0.368 
  • R-Value Work: 0.318 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 87.260α = 90.00
b = 114.961β = 90.72
c = 316.455γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XDSdata reduction
Aimlessdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-02-08
    Type: Initial release