7SD1

Crystal structure of SHOC2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structural basis for SHOC2 modulation of RAS signalling.

Liau, N.P.D.Johnson, M.C.Izadi, S.Gerosa, L.Hammel, M.Bruning, J.M.Wendorff, T.J.Phung, W.Hymowitz, S.G.Sudhamsu, J.

(2022) Nature 609: 400-407

  • DOI: https://doi.org/10.1038/s41586-022-04838-3
  • Primary Citation of Related Structures:  
    7SD0, 7SD1

  • PubMed Abstract: 

    The RAS-RAF pathway is one of the most commonly dysregulated in human cancers 1-3 . Despite decades of study, understanding of the molecular mechanisms underlying dimerization and activation 4 of the kinase RAF remains limited. Recent structures of inactive RAF monomer 5 and active RAF dimer 5-8 bound to 14-3-3 9,10 have revealed the mechanisms by which 14-3-3 stabilizes both RAF conformations via specific phosphoserine residues. Prior to RAF dimerization, the protein phosphatase 1 catalytic subunit (PP1C) must dephosphorylate the N-terminal phosphoserine (NTpS) of RAF 11 to relieve inhibition by 14-3-3, although PP1C in isolation lacks intrinsic substrate selectivity. SHOC2 is as an essential scaffolding protein that engages both PP1C and RAS to dephosphorylate RAF NTpS 11-13 , but the structure of SHOC2 and the architecture of the presumptive SHOC2-PP1C-RAS complex remain unknown. Here we present a cryo-electron microscopy structure of the SHOC2-PP1C-MRAS complex to an overall resolution of 3 Å, revealing a tripartite molecular architecture in which a crescent-shaped SHOC2 acts as a cradle and brings together PP1C and MRAS. Our work demonstrates the GTP dependence of multiple RAS isoforms for complex formation, delineates the RAS-isoform preference for complex assembly, and uncovers how the SHOC2 scaffold and RAS collectively drive specificity of PP1C for RAF NTpS. Our data indicate that disease-relevant mutations affect complex assembly, reveal the simultaneous requirement of two RAS molecules for RAF activation, and establish rational avenues for discovery of new classes of inhibitors to target this pathway.


  • Organizational Affiliation

    Department of Structural Biology, Genentech, South San Francisco, CA, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Leucine-rich repeat protein SHOC-2
A, B, C, D
585Homo sapiensMutation(s): 0 
Gene Names: SHOC2KIAA0862
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UQ13 (Homo sapiens)
Explore Q9UQ13 
Go to UniProtKB:  Q9UQ13
PHAROS:  Q9UQ13
GTEx:  ENSG00000108061 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UQ13
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 168.63α = 90
b = 201.83β = 90
c = 233.77γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other privateUnited States--

Revision History  (Full details and data files)

  • Version 1.0: 2022-04-20
    Type: Initial release
  • Version 1.1: 2022-07-20
    Changes: Database references
  • Version 1.2: 2022-07-27
    Changes: Database references
  • Version 1.3: 2022-09-21
    Changes: Database references
  • Version 1.4: 2023-10-18
    Changes: Data collection, Refinement description