3A1J

Crystal structure of the human Rad9-Hus1-Rad1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of the Human Rad9-Hus1-Rad1 Clamp

Sohn, S.Y.Cho, Y.

(2009) J.Mol.Biol. 390: 490-502

  • DOI: 10.1016/j.jmb.2009.05.028

  • PubMed Abstract: 
  • Three evolutionarily conserved proteins, Rad9, Hus1, and Rad1, form a heterotrimeric 9-1-1 complex that plays critical roles in cellular responses to DNA damage by activating checkpoints and by recruiting DNA repair enzymes to DNA lesions. We have de ...

    Three evolutionarily conserved proteins, Rad9, Hus1, and Rad1, form a heterotrimeric 9-1-1 complex that plays critical roles in cellular responses to DNA damage by activating checkpoints and by recruiting DNA repair enzymes to DNA lesions. We have determined the crystal structure of the human Rad9 (residues 1-272)-Hus1-Rad1 complex at 2.5 A resolution. The 9(1-272)-1-1 complex forms a closed ring, with each subunit having a similar structure. Despite its high level of similarity to proliferating cell nucleus antigen in terms of overall structure, the 9(1-272)-1-1 complex exhibits notable differences in local structures, including interdomain connecting loops, H2 and H3 helices, and loops in the vicinity of the helices of each subunit. These local structural variations provide several unique features to the 9-1-1 heterotrimeric complex-including structures of intermolecular interfaces and the inner surface around the central hole, and different electrostatic potentials at and near the interdomain connecting loops of each 9-1-1 subunit-compared to the proliferating cell nucleus antigen trimer. We propose that these structural features allow the 9-1-1 complex to bind to a damaged DNA during checkpoint control and to serve as a platform for base excision repair. We also show that the 9(1-272)-1-1 complex, but not the full-length 9-1-1 complex, forms a stable complex with the 5' recessed DNA, suggesting that the C-terminal tail of Rad9 is involved in the regulation of the 9-1-1 complex in DNA binding.


    Organizational Affiliation

    National Creative Research Center for Structural Biology and Department of Life Science, Pohang University of Science and Technology, Hyo-ja dong, Pohang, KyungBook, South Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cell cycle checkpoint control protein RAD9A
A
266Homo sapiensMutation(s): 0 
Gene Names: RAD9A
EC: 3.1.11.2
Find proteins for Q99638 (Homo sapiens)
Go to Gene View: RAD9A
Go to UniProtKB:  Q99638
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Checkpoint protein HUS1
B
281Homo sapiensMutation(s): 0 
Gene Names: HUS1
Find proteins for O60921 (Homo sapiens)
Go to Gene View: HUS1
Go to UniProtKB:  O60921
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Cell cycle checkpoint protein RAD1
C
263Homo sapiensMutation(s): 0 
Gene Names: RAD1 (REC1)
EC: 3.1.11.2
Find proteins for O60671 (Homo sapiens)
Go to Gene View: RAD1
Go to UniProtKB:  O60671
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SUC
Query on SUC

Download SDF File 
Download CCD File 
A
SUCROSE
C12 H22 O11
CZMRCDWAGMRECN-UGDNZRGBSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.209 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 77.154α = 90.00
b = 70.776β = 99.20
c = 86.661γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
CNSrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2009-04-08 
  • Released Date: 2009-06-02 
  • Deposition Author(s): Sohn, S.Y., Cho, Y.

Revision History 

  • Version 1.0: 2009-06-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance