3GGR

Crystal Structure of the Human Rad9-Hus1-Rad1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.289 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and functional implications of the human rad9-hus1-rad1 cell cycle checkpoint complex

Xu, M.Bai, L.Gong, Y.Xie, W.Hang, H.Y.Jiang, T.

(2009) J.Biol.Chem. 284: 20457-20461

  • DOI: 10.1074/jbc.C109.022384

  • PubMed Abstract: 
  • Cellular DNA lesions are efficiently countered by DNA repair in conjunction with delays in cell cycle progression. Previous studies have demonstrated that Rad9, Hus1, and Rad1 can form a heterotrimeric complex (the 9-1-1 complex) that plays dual role ...

    Cellular DNA lesions are efficiently countered by DNA repair in conjunction with delays in cell cycle progression. Previous studies have demonstrated that Rad9, Hus1, and Rad1 can form a heterotrimeric complex (the 9-1-1 complex) that plays dual roles in cell cycle checkpoint activation and DNA repair in eukaryotic cells. Although the 9-1-1 complex has been proposed to form a toroidal structure similar to proliferating cell nuclear antigen (PCNA), which plays essential roles in DNA replication and repair, the structural basis by which it performs different functions has not been elucidated. Here we report the crystal structure of the human 9-1-1 complex at 3.2 A resolution. The crystal structure, together with biochemical assays, reveals that the interdomain connecting loops (IDC loop) of hRad9, hHus1, and hRad1 are largely divergent, and further cocrystallization study indicates that a PCNA-interacting box (PIP box)-containing peptide derived from hFen1 binds tightly to the interdomain connecting loop of hRad1, providing the molecular basis for the damage repair-specific activity of the 9-1-1 complex in contrast to PCNA. Furthermore, structural comparison with PCNA reveals other unique structural features of the 9-1-1 complex that are proposed to contribute to DNA damage recognition.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cell cycle checkpoint control protein RAD9A
A
270Homo 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
286Homo 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
282Homo 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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.289 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 71.029α = 90.00
b = 67.164β = 97.58
c = 83.405γ = 90.00
Software Package:
Software NamePurpose
PHENIXmodel building
HKL-2000data scaling
HKL-2000data reduction
PHENIXphasing
HKL-2000data collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-06-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2014-02-12
    Type: Database references