6AO5

Crystal structure of human MST2 in complex with SAV1 SARAH domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.955 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

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:  

  • 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 ...

    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 STRIPAKSLMAP 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 STRIPAKSLMAP 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 Pharmacology, University of Texas Southwestern Medical Center, Dallas, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase 3
A
362Homo sapiensMutation(s): 1 
Gene Names: STK3 (KRS1, MST2)
EC: 2.7.11.1
Find proteins for Q13188 (Homo sapiens)
Go to Gene View: STK3
Go to UniProtKB:  Q13188
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein salvador homolog 1
B
93Homo sapiensMutation(s): 0 
Gene Names: SAV1 (WW45)
Find proteins for Q9H4B6 (Homo sapiens)
Go to Gene View: SAV1
Go to UniProtKB:  Q9H4B6
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download SDF File 
Download CCD File 
A
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.955 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.235 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 223.678α = 90.00
b = 223.678β = 90.00
c = 79.645γ = 120.00
Software Package:
Software NamePurpose
HKL-3000data reduction
PHENIXrefinement
HKL-3000data scaling
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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