Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 48.61 kDa 
• Atom Count: 2,938 
• Modelled Residue Count: 367 
• Deposited Residue Count: 432 
• Unique protein chains: 1

 5VQ9

Structure of human TRIP13, Apo form

• PDB DOI:  https://doi.org/10.2210/pdb5VQ9/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2017-05-08 Released: 2017-06-14 
• Deposition Author(s): Ye, Q., Corbett, K.D.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.02 Å
• R-Value Free: 0.238 
• R-Value Work: 0.199 
• R-Value Observed: 0.201 

Literature

The AAA+ ATPase TRIP13 remodels HORMA domains through N-terminal engagement and unfolding.

Ye, Q., Kim, D.H., Dereli, I., Rosenberg, S.C., Hagemann, G., Herzog, F., Toth, A., Cleveland, D.W., Corbett, K.D.

(2017) EMBO J 36: 2419-2434

• PubMed: 28659378 
• DOI: https://doi.org/10.15252/embj.201797291
• Primary Citation of Related Structures:  
  5VQ9, 5VQA


• PubMed Abstract: 
  

Proteins of the conserved HORMA domain family, including the spindle assembly checkpoint protein MAD2 and the meiotic HORMADs, assemble into signaling complexes by binding short peptides termed "closure motifs". The AAA+ ATPase TRIP13 regulates both MAD2 and meiotic HORMADs by disassembling these HORMA domain-closure motif complexes, but its mechanisms of substrate recognition and remodeling are unknown. Here, we combine X-ray crystallography and crosslinking mass spectrometry to outline how TRIP13 recognizes MAD2 with the help of the adapter protein p31 ^comet We show that p31 ^comet binding to the TRIP13 N-terminal domain positions the disordered MAD2 N-terminus for engagement by the TRIP13 "pore loops", which then unfold MAD2 in the presence of ATP N-terminal truncation of MAD2 renders it refractory to TRIP13 action in vitro , and in cells causes spindle assembly checkpoint defects consistent with loss of TRIP13 function. Similar truncation of HORMAD1 in mouse spermatocytes compromises its TRIP13-mediated removal from meiotic chromosomes, highlighting a conserved mechanism for recognition and disassembly of HORMA domain-closure motif complexes by TRIP13.

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Organizational Affiliation: 

Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Pachytene checkpoint protein 2 homolog	A [auth D]	432	Homo sapiens	Mutation(s): 1  Gene Names: TRIP13, PCH2
UniProt & NIH Common Fund Data Resources
Find proteins for Q15645 (Homo sapiens) Explore Q15645  Go to UniProtKB:  Q15645
PHAROS:  Q15645

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.02 Å
• R-Value Free: 0.238 
• R-Value Work: 0.199 
• R-Value Observed: 0.201 
• Space Group: P 6₅
• Diffraction Data: https://doi.org/10.15785/SBGRID/409

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 96.964	α = 90
b = 96.964	β = 90
c = 122.646	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2017-06-14 
Deposition Author(s): Ye, Q., Corbett, K.D.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R01 GM104141

Revision History  

• Version 1.0: 2017-06-14
  Type: Initial release
  
• Version 1.1: 2017-07-12
  Changes: Database references
• Version 1.2: 2017-08-30
  Changes: Database references
• Version 1.3: 2017-09-27
  Changes: Author supporting evidence
• Version 1.4: 2020-01-01
  Changes: Author supporting evidence