6WWA

Crystal structure of human SHLD2-SHLD3-REV7 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.240 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Molecular mechanisms of assembly and TRIP13-mediated remodeling of the human Shieldin complex.

Xie, W.Wang, S.Wang, J.de la Cruz, M.J.Xu, G.Scaltriti, M.Patel, D.J.

(2021) Proc Natl Acad Sci U S A 118

  • DOI: 10.1073/pnas.2024512118
  • Primary Citation of Related Structures:  
    7L9P, 6WWA, 6WW9

  • PubMed Abstract: 
  • The Shieldin complex, composed of REV7, SHLD1, SHLD2, and SHLD3, protects DNA double-strand breaks (DSBs) to promote nonhomologous end joining. The AAA + ATPase TRIP13 remodels Shieldin to regulate DNA repair pathway choice. Here we report crystal structures of human SHLD3-REV7 binary and fused SHLD2-SHLD3-REV7 ternary complexes, revealing that assembly of Shieldin requires fused SHLD2-SHLD3 induced conformational heterodimerization of open (O-REV7) and closed (C-REV7) forms of REV7 ...

    The Shieldin complex, composed of REV7, SHLD1, SHLD2, and SHLD3, protects DNA double-strand breaks (DSBs) to promote nonhomologous end joining. The AAA + ATPase TRIP13 remodels Shieldin to regulate DNA repair pathway choice. Here we report crystal structures of human SHLD3-REV7 binary and fused SHLD2-SHLD3-REV7 ternary complexes, revealing that assembly of Shieldin requires fused SHLD2-SHLD3 induced conformational heterodimerization of open (O-REV7) and closed (C-REV7) forms of REV7. We also report the cryogenic electron microscopy (cryo-EM) structures of the ATPγS-bound fused SHLD2-SHLD3-REV7-TRIP13 complexes, uncovering the principles underlying the TRIP13-mediated disassembly mechanism of the Shieldin complex. We demonstrate that the N terminus of REV7 inserts into the central channel of TRIP13, setting the stage for pulling the unfolded N-terminal peptide of C-REV7 through the central TRIP13 hexameric channel. The primary interface involves contacts between the safety-belt segment of C-REV7 and a conserved and negatively charged loop of TRIP13. This process is mediated by ATP hydrolysis-triggered rotatory motions of the TRIP13 ATPase, thereby resulting in the disassembly of the Shieldin complex.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065; xiew@mskcc.org pateld@mskcc.org.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mitotic spindle assembly checkpoint protein MAD2B ABCD211Homo sapiensMutation(s): 0 
Gene Names: MAD2L2MAD2BREV7
Find proteins for Q9UI95 (Homo sapiens)
Explore Q9UI95 
Go to UniProtKB:  Q9UI95
NIH Common Fund Data Resources
PHAROS:  Q9UI95
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Shieldin complex subunit 2,Shieldin complex subunit 3 chimera XY99Homo sapiensMutation(s): 0 
Gene Names: SHLD2FAM35ARINN2SHLD3FLJ26957RINN1
Find proteins for Q86V20 (Homo sapiens)
Explore Q86V20 
Go to UniProtKB:  Q86V20
NIH Common Fund Data Resources
PHAROS:  Q86V20
Find proteins for Q6ZNX1 (Homo sapiens)
Explore Q6ZNX1 
Go to UniProtKB:  Q6ZNX1
NIH Common Fund Data Resources
PHAROS:  Q6ZNX1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.240 
  • Space Group: I 4 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 331.842α = 90
b = 331.842β = 90
c = 331.842γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2020-05-08 
  • Released Date: 2021-03-03 
  • Deposition Author(s): Xie, W., Patel, D.J.

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-03
    Type: Initial release