4FZA

Crystal structure of MST4-MO25 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the MST4 in Complex with MO25 Provides Insights into Its Activation Mechanism

Shi, Z.Jiao, S.Zhang, Z.Ma, M.Zhang, Z.Chen, C.Wang, K.Wang, H.Wang, W.Zhang, L.Zhao, Y.Zhou, Z.

(2013) Structure 21: 449-461

  • DOI: https://doi.org/10.1016/j.str.2013.01.007
  • Primary Citation of Related Structures:  
    4FZA, 4FZD, 4FZF

  • PubMed Abstract: 

    Mammalian STE20-like kinase MST4 regulates multiple cellular aspects such as cell polarity and proliferation. MST4 acts downstream of LKB1/MO25/STRAD complex to induce brush border formation. MO25 directly interacts with MST4 to promote its kinase activity. Here, we report the crystal structure of MST4 in complex with MO25. Association of MO25 rotates the αC helix of MST4 toward its catalytic core, stabilizing the αC helix in an active position. The kinase domain of MST4 forms a specific homodimer that is required for trans-autophosphorylation. MO25-stimulated activation of MST4 promotes apoptosis in HEK293T cells. Atomic resolution permitted the study of interface mutations capable of disrupting the MST4-MO25 interaction or the kinase-domain-mediated homodimerization. These mutations impaired MST4 kinase activation and function within the cell. Collectively, our study identifies the activation mechanism of MST4 and provides a structural basis for further functional study.


  • Organizational Affiliation

    State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Calcium-binding protein 39328Homo sapiensMutation(s): 0 
Gene Names: CAB39MO25CGI-66
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y376 (Homo sapiens)
Explore Q9Y376 
Go to UniProtKB:  Q9Y376
GTEx:  ENSG00000135932 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y376
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein kinase MST4283Homo sapiensMutation(s): 1 
Gene Names: MST4MASK
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9P289 (Homo sapiens)
Explore Q9P289 
Go to UniProtKB:  Q9P289
GTEx:  ENSG00000134602 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9P289
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: I 4 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 237.583α = 90
b = 237.583β = 90
c = 237.583γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-06
    Type: Initial release
  • Version 1.1: 2013-04-17
    Changes: Database references
  • Version 1.2: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description