6AO5

Crystal structure of human MST2 in complex with SAV1 SARAH domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.96 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.236 

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Ligand Structure Quality Assessment 


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Literature

SAV1 promotes Hippo kinase activation through antagonizing the PP2A phosphatase STRIPAK.

Bae, S.J.Ni, L.Osinski, A.Tomchick, D.R.Brautigam, C.A.Luo, X.

(2017) Elife 6

  • DOI: 10.7554/eLife.30278
  • Primary Citation of Related Structures:  
    6AO5, 6AR0, 6AR2

  • PubMed Abstract: 
  • The Hippo pathway controls tissue growth and homeostasis through a central MST-LATS kinase cascade. The scaffold protein SAV1 promotes the activation of this kinase cascade, but the molecular mechanisms remain unknown. Here, we discover SAV1-mediated inhibition of the PP2A complex STRIPAK SLMAP as a key mechanism of MST1/2 activation ...

    The Hippo pathway controls tissue growth and homeostasis through a central MST-LATS kinase cascade. The scaffold protein SAV1 promotes the activation of this kinase cascade, but the molecular mechanisms remain unknown. Here, we discover SAV1-mediated inhibition of the PP2A complex STRIPAK SLMAP as a key mechanism of MST1/2 activation. SLMAP binding to autophosphorylated MST2 linker recruits STRIPAK and promotes PP2A-mediated dephosphorylation of MST2 at the activation loop. Our structural and biochemical studies reveal that SAV1 and MST2 heterodimerize through their SARAH domains. Two SAV1-MST2 heterodimers further dimerize through SAV1 WW domains to form a heterotetramer, in which MST2 undergoes trans-autophosphorylation. SAV1 directly binds to STRIPAK and inhibits its phosphatase activity, protecting MST2 activation-loop phosphorylation. Genetic ablation of SLMAP in human cells leads to spontaneous activation of the Hippo pathway and alleviates the need for SAV1 in Hippo signaling. Thus, SAV1 promotes Hippo activation through counteracting the STRIPAK SLMAP PP2A phosphatase complex.


    Related Citations: 
    • Structural basis for autoactivation of human Mst2 kinase and its regulation by RASSF5.
      Ni, L., Li, S., Yu, J., Min, J., Brautigam, C.A., Tomchick, D.R., Pan, D., Luo, X.
      (2013) Structure 21: 1757

    Organizational Affiliation

    Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase 3A362Homo sapiensMutation(s): 1 
Gene Names: STK3KRS1MST2
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13188 (Homo sapiens)
Explore Q13188 
Go to UniProtKB:  Q13188
PHAROS:  Q13188
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13188
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein salvador homolog 1B93Homo sapiensMutation(s): 0 
Gene Names: SAV1WW45
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H4B6 (Homo sapiens)
Explore Q9H4B6 
Go to UniProtKB:  Q9H4B6
PHAROS:  Q9H4B6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H4B6
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download Ideal Coordinates CCD File 
C [auth A]PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.96 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.236 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 223.678α = 90
b = 223.678β = 90
c = 79.645γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
PDB_EXTRACTdata extraction
HKL-3000data reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-11-08
    Type: Initial release