6F0X

Cryo-EM structure of TRIP13 in complex with ATP gamma S, p31comet, C-Mad2 and Cdc20


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mechanism for remodelling of the cell cycle checkpoint protein MAD2 by the ATPase TRIP13.

Alfieri, C.Chang, L.Barford, D.

(2018) Nature 559: 274-278

  • DOI: 10.1038/s41586-018-0281-1
  • Primary Citation of Related Structures:  
    6F0X

  • PubMed Abstract: 
  • The maintenance of genome stability during mitosis is coordinated by the spindle assembly checkpoint (SAC) through its effector the mitotic checkpoint complex (MCC), an inhibitor of the anaphase-promoting complex (APC/C, also known as the cyclosome) ...

    The maintenance of genome stability during mitosis is coordinated by the spindle assembly checkpoint (SAC) through its effector the mitotic checkpoint complex (MCC), an inhibitor of the anaphase-promoting complex (APC/C, also known as the cyclosome) 1,2 . Unattached kinetochores control MCC assembly by catalysing a change in the topology of the β-sheet of MAD2 (an MCC subunit), thereby generating the active closed MAD2 (C-MAD2) conformer 3-5 . Disassembly of free MCC, which is required for SAC inactivation and chromosome segregation, is an ATP-dependent process driven by the AAA+ ATPase TRIP13. In combination with p31 comet , an SAC antagonist 6 , TRIP13 remodels C-MAD2 into inactive open MAD2 (O-MAD2) 7-10 . Here, we present a mechanism that explains how TRIP13-p31 comet disassembles the MCC. Cryo-electron microscopy structures of the TRIP13-p31 comet -C-MAD2-CDC20 complex reveal that p31 comet recruits C-MAD2 to a defined site on the TRIP13 hexameric ring, positioning the N terminus of C-MAD2 (MAD2 NT ) to insert into the axial pore of TRIP13 and distorting the TRIP13 ring to initiate remodelling. Molecular modelling suggests that by gripping MAD2 NT within its axial pore, TRIP13 couples sequential ATP-driven translocation of its hexameric ring along MAD2 NT to push upwards on, and simultaneously rotate, the globular domains of the p31 comet -C-MAD2 complex. This unwinds a region of the αA helix of C-MAD2 that is required to stabilize the C-MAD2 β-sheet, thus destabilizing C-MAD2 in favour of O-MAD2 and dissociating MAD2 from p31 comet . Our study provides insights into how specific substrates are recruited to AAA+ ATPases through adaptor proteins and suggests a model of how translocation through the axial pore of AAA+ ATPases is coupled to protein remodelling.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, UK. dbarford@mrc-lmb.cam.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division cycle protein 20 homologQ499Homo sapiensMutation(s): 0 
Gene Names: CDC20
Find proteins for Q12834 (Homo sapiens)
Explore Q12834 
Go to UniProtKB:  Q12834
NIH Common Fund Data Resources
PHAROS  Q12834
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Mitotic spindle assembly checkpoint protein MAD2AZ205Homo sapiensMutation(s): 0 
Gene Names: MAD2L1MAD2
Find proteins for Q13257 (Homo sapiens)
Explore Q13257 
Go to UniProtKB:  Q13257
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PHAROS  Q13257
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  • Reference Sequence
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Pachytene checkpoint protein 2 homologABCDEF432Homo sapiensMutation(s): 0 
Gene Names: TRIP13PCH2
Find proteins for Q15645 (Homo sapiens)
Explore Q15645 
Go to UniProtKB:  Q15645
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PHAROS  Q15645
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MAD2L1-binding proteinP274Homo sapiensMutation(s): 0 
Gene Names: MAD2L1BPCMT2KIAA0110
Find proteins for Q15013 (Homo sapiens)
Explore Q15013 
Go to UniProtKB:  Q15013
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PHAROS  Q15013
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AGS
Query on AGS

Download CCD File 
A, B, C, D, E
PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
C10 H16 N5 O12 P3 S
NLTUCYMLOPLUHL-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC576/A14109

Revision History 

  • Version 1.0: 2018-05-02
    Type: Initial release
  • Version 1.1: 2018-07-04
    Changes: Data collection, Database references
  • Version 1.2: 2018-07-18
    Changes: Data collection, Database references