6BN1

Salvador Hippo SARAH domain complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Salvador has an extended SARAH domain that mediates binding to Hippo kinase.

Cairns, L.Tran, T.Fowl, B.H.Patterson, A.Kim, Y.J.Bothner, B.Kavran, J.M.

(2018) J. Biol. Chem. 293: 5532-5543

  • DOI: 10.1074/jbc.RA117.000923

  • PubMed Abstract: 
  • The Hippo pathway controls cell proliferation and differentiation through the precisely tuned activity of a core kinase cassette. The activity of Hippo kinase is modulated by interactions between its C-terminal coiled-coil, termed the SARAH domain, a ...

    The Hippo pathway controls cell proliferation and differentiation through the precisely tuned activity of a core kinase cassette. The activity of Hippo kinase is modulated by interactions between its C-terminal coiled-coil, termed the SARAH domain, and the SARAH domains of either dRassF or Salvador. Here, we wanted to understand the molecular basis of SARAH domain mediated interactions and their influence on Hippo kinase activity. We focused on Salvador, a positive effector of Hippo activity and the least well characterized SARAH domain-containing protein. We determined the crystal structure of a complex between Salvador and Hippo SARAH domains from Drosophila.  This structure provided insight into the organization of the Salvador SARAH domain including a folded N-terminal extension that expands the binding interface with Hippo SARAH domain.  We also found this extension improves the solubility of Salvador SARAH domain, enhances binding to Hippo, and is unique to Salvador. We therefore suggest expanding the definition of the Salvador SARAH domain to include this extended region. The heterodimeric assembly observed in the crystal was confirmed by crosslinked mass spectrometry and provided a structural basis for the mutually exclusive interactions of Hippo with either dRassF or Salvador. Of note, Salvador influenced the kinase activity of Mst2, the mammalian Hippo homolog. In co-transfected HEK293T cells, human Salvador increased the levels of Mst2 autophosphorylation and Mst2-mediated phosphorylation of select substrates, whereas Salvador SARAH domain inhibited Mst2 autophosphorylation in vitro. These results suggest Salvador enhances the effects of Hippo kinase activity at multiple points in the Hippo pathway.


    Organizational Affiliation

    Johns Hopkins School of Public Health, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase hippo
A
57Drosophila melanogasterMutation(s): 0 
Gene Names: hpo
EC: 2.7.11.1
Find proteins for Q8T0S6 (Drosophila melanogaster)
Go to UniProtKB:  Q8T0S6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Scaffold protein salvador
B
70Drosophila melanogasterMutation(s): 0 
Gene Names: sav (SHRP)
Find proteins for Q9VCR6 (Drosophila melanogaster)
Go to UniProtKB:  Q9VCR6
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NI
Query on NI

Download SDF File 
Download CCD File 
B
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
MPD
Query on MPD

Download SDF File 
Download CCD File 
A, B
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.202 
  • Space Group: P 43 2 2
Unit Cell:
Length (Å)Angle (°)
a = 49.934α = 90.00
b = 49.934β = 90.00
c = 186.169γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-03-14
    Type: Initial release
  • Version 1.1: 2018-03-21
    Type: Database references
  • Version 1.2: 2018-04-25
    Type: Data collection, Database references