1S2H

The Mad2 spindle checkpoint protein possesses two distinct natively folded states


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

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: 338-345

  • DOI: 10.1038/nsmb748
  • Primary Citation of Related Structures:  
    1S2H

  • PubMed Abstract: 
  • The spindle checkpoint delays chromosome segregation in response to misaligned sister chromatids during mitosis, thus ensuring the fidelity of chromosome inheritance. Through binding to Cdc20, the Mad2 spindle checkpoint protein inhibits the target o ...

    The spindle checkpoint delays chromosome segregation in response to misaligned sister chromatids during mitosis, thus ensuring the fidelity of chromosome inheritance. Through binding to Cdc20, the Mad2 spindle checkpoint protein inhibits the target of this checkpoint, the ubiquitin protein ligase APC/C(Cdc20). We now show that without cofactor binding or covalent modification Mad2 adopts two distinct folded conformations at equilibrium (termed N1-Mad2 and N2-Mad2). The structure of N2-Mad2 has been determined by NMR spectroscopy. N2-Mad2 is much more potent in APC/C inhibition. Overexpression of a Mad2 mutant that specifically sequesters N2-Mad2 partially blocks checkpoint signaling in living cells. The two Mad2 conformers interconvert slowly in vitro, but interconversion is accelerated by a fragment of Mad1, an upstream regulator of Mad2. Our results suggest that the unusual two-state behavior of Mad2 is critical for spindle checkpoint signaling.


    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 Biol 7: 224
    • 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, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mitotic spindle assembly checkpoint protein MAD2AA206Homo sapiensMutation(s): 1 
Gene Names: MAD2L1MAD2
Find proteins for Q13257 (Homo sapiens)
Explore Q13257 
Go to UniProtKB:  Q13257
NIH Common Fund Data Resources
PHAROS  Q13257
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1S2H Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-03-30
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance