2QYF

Crystal structure of the Mad2/p31(comet)/Mad2-binding peptide ternary complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

p31comet blocks Mad2 activation through structural mimicry.

Yang, M.Li, B.Tomchick, D.R.Machius, M.Rizo, J.Yu, H.Luo, X.

(2007) Cell 131: 744-755

  • DOI: 10.1016/j.cell.2007.08.048

  • PubMed Abstract: 
  • The status of spindle checkpoint signaling depends on the balance of two opposing dynamic processes that regulate the highly unusual two-state behavior of Mad2. In mitosis, a Mad1-Mad2 core complex recruits cytosolic Mad2 to kinetochores through Mad2 ...

    The status of spindle checkpoint signaling depends on the balance of two opposing dynamic processes that regulate the highly unusual two-state behavior of Mad2. In mitosis, a Mad1-Mad2 core complex recruits cytosolic Mad2 to kinetochores through Mad2 dimerization and converts Mad2 to a conformer amenable to Cdc20 binding, thereby facilitating checkpoint activation. p31(comet) inactivates the checkpoint through binding to Mad1- or Cdc20-bound Mad2, thereby preventing Mad2 activation and promoting the dissociation of the Mad2-Cdc20 complex. Here, we report the crystal structure of the Mad2-p31(comet) complex. The C-terminal region of Mad2 that undergoes rearrangement in different Mad2 conformers is a major structural determinant for p31(comet) binding, explaining the specificity of p31(comet) toward Mad1- or Cdc20-bound Mad2. p31(comet) adopts a fold strikingly similar to that of Mad2 and binds at the dimerization interface of Mad2. Thus, p31(comet) exploits the two-state behavior of Mad2 to block its activation by acting as an "anti-Mad2."


    Related Citations: 
    • Structure of the Mad2 spindle assembly checkpoint protein and its interaction with Cdc20.
      Luo, X.,Fang, G.,Coldiron, M.,Lin, Y.,Yu, H.,Kirschner, M.W.,Wagner, G.
      (2000) Nat.Struct.Mol.Biol. 7: 224
    • The Mad2 spindle checkpoint protein has two distinct natively folded states.
      Luo, X.,Tang, Z.,Xia, G.,Wassmann, K.,Matsumoto, T.,Rizo, J.,Yu, H.
      (2004) Nat.Struct.Mol.Biol. 11: 338
    • The Mad2 Spindle Checkpoint Protein Undergoes Similar Major Conformational Changes Upon Binding to Either Mad1 or Cdc20
      Luo, X.,Tang, Z.,Rizo, J.,Yu, H.
      (2002) Mol.Cell 9: 59


    Organizational Affiliation

    Department of Pharmacology, The University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, TX 75390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitotic spindle assembly checkpoint protein MAD2A
A, C
206Homo sapiensMutation(s): 1 
Gene Names: MAD2L1 (MAD2)
Find proteins for Q13257 (Homo sapiens)
Go to Gene View: MAD2L1
Go to UniProtKB:  Q13257
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MAD2L1-binding protein
B, D
240Homo sapiensMutation(s): 0 
Gene Names: MAD2L1BP (CMT2, KIAA0110)
Find proteins for Q15013 (Homo sapiens)
Go to Gene View: MAD2L1BP
Go to UniProtKB:  Q15013
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
peptide
E, F
12N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 68.667α = 90.00
b = 104.519β = 90.00
c = 138.825γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
REFMACrefinement
MLPHAREphasing
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-09-18
    Type: Derived calculations