3G65

Crystal Structure of the Human Rad9-Rad1-Hus1 DNA Damage Checkpoint Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.224 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of the rad9-rad1-hus1 DNA damage checkpoint complex--implications for clamp loading and regulation.

Dore, A.S.Kilkenny, M.L.Rzechorzek, N.J.Pearl, L.H.

(2009) Mol Cell 34: 735-745

  • DOI: 10.1016/j.molcel.2009.04.027
  • Primary Citation of Related Structures:  
    3G65

  • PubMed Abstract: 
  • Rad9, Rad1, and Hus1 form a heterotrimeric complex (9-1-1) that is loaded onto DNA at sites of DNA damage. DNA-loaded 9-1-1 activates signaling through the Chk1 arm of the DNA damage checkpoint response via recruitment and stimulation of ATR. Additionally, 9-1-1 may play a direct role in facilitating DNA damage repair via interaction with a number of DNA repair enzymes ...

    Rad9, Rad1, and Hus1 form a heterotrimeric complex (9-1-1) that is loaded onto DNA at sites of DNA damage. DNA-loaded 9-1-1 activates signaling through the Chk1 arm of the DNA damage checkpoint response via recruitment and stimulation of ATR. Additionally, 9-1-1 may play a direct role in facilitating DNA damage repair via interaction with a number of DNA repair enzymes. We have now determined the crystal structure of the human 9-1-1 complex, revealing a toroidal structure with a similar architecture to the homotrimeric PCNA DNA-binding clamp. The structure explains the formation of a unique heterotrimeric arrangement and reveals significant differences among the three subunits in the sites implicated in binding to the clamp loader and to ligand proteins. Biochemical analysis reveals a single repair enzyme-binding site on 9-1-1 that can be blocked competitively by the PCNA-binding cell-cycle regulator p21(cip1/waf1).


    Organizational Affiliation

    CR-UK DNA Repair Enzymes Group, Section of Structural Biology, The Institute of Cancer Research, 237 Fulham Road, Chelsea, SW36JB London, UK.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell cycle checkpoint control protein RAD9A A296Homo sapiensMutation(s): 0 
Gene Names: RAD9RAD9A
EC: 3.1.11.2
Find proteins for Q99638 (Homo sapiens)
Explore Q99638 
Go to UniProtKB:  Q99638
NIH Common Fund Data Resources
PHAROS:  Q99638
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cell cycle checkpoint protein RAD1 B282Homo sapiensMutation(s): 0 
Gene Names: RAD1REC1
EC: 3.1.11.2
Find proteins for O60671 (Homo sapiens)
Explore O60671 
Go to UniProtKB:  O60671
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PHAROS:  O60671
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Checkpoint protein HUS1 C280Homo sapiensMutation(s): 0 
Gene Names: HUS1
Find proteins for O60921 (Homo sapiens)
Explore O60921 
Go to UniProtKB:  O60921
NIH Common Fund Data Resources
PHAROS:  O60921
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.224 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.246α = 90
b = 70.673β = 99.51
c = 83.151γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-05-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-09-25
    Changes: Derived calculations