6AR2

Structure of human SLMAP FHA domain in complex with pMST2

  • Classification: MEMBRANE PROTEIN
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli
  • Mutation(s): No 

  • Deposited: 2017-08-21 Released: 2018-07-04 
  • Deposition Author(s): Osinski, A., Ni, L., Luo, X.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), Welch Foundation

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.163 

wwPDB Validation   3D Report Full Report


This is version 1.2 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: https://doi.org/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.

    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
Sarcolemmal membrane-associated protein
A, B
140Homo sapiensMutation(s): 0 
Gene Names: SLMAP, KIAA1601, SLAP, UNQ1847/PRO3577
UniProt & NIH Common Fund Data Resources
Find proteins for Q14BN4 (Homo sapiens)
Explore Q14BN4 
Go to UniProtKB:  Q14BN4
PHAROS:  Q14BN4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14BN4
Protein Feature View
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ASP-GLY-TPO-MET-LYS-ARG
C, D
10Homo sapiensMutation(s): 0 
Gene Names: STK3, KRS1, MST2
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
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
C, D
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.163 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.758α = 90
b = 70.534β = 90
c = 91.015γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM107415
Welch FoundationUnited StatesI-1932

Revision History  (Full details and data files)

  • Version 1.0: 2018-07-04
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence