6C5X

Crystal Structure of SOCS1 in complex with ElonginB and ElonginC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.237 

wwPDB Validation 3D Report Full Report



Literature

The molecular basis of JAK/STAT inhibition by SOCS1.

Liau, N.P.D.Laktyushin, A.Lucet, I.S.Murphy, J.M.Yao, S.Whitlock, E.Callaghan, K.Nicola, N.A.Kershaw, N.J.Babon, J.J.

(2018) Nat Commun 9: 1558-1558

  • DOI: 10.1038/s41467-018-04013-1
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The SOCS family of proteins are negative-feedback inhibitors of signalling induced by cytokines that act via the JAK/STAT pathway. SOCS proteins can act as ubiquitin ligases by recruiting Cullin5 to ubiquitinate signalling components; however, SOCS1, ...

    The SOCS family of proteins are negative-feedback inhibitors of signalling induced by cytokines that act via the JAK/STAT pathway. SOCS proteins can act as ubiquitin ligases by recruiting Cullin5 to ubiquitinate signalling components; however, SOCS1, the most potent member of the family, can also inhibit JAK directly. Here we determine the structural basis of both these modes of inhibition. Due to alterations within the SOCS box domain, SOCS1 has a compromised ability to recruit Cullin5; however, it is a direct, potent and selective inhibitor of JAK catalytic activity. The kinase inhibitory region of SOCS1 targets the substrate binding groove of JAK with high specificity and thereby blocks any subsequent phosphorylation. SOCS1 is a potent inhibitor of the interferon gamma (IFNγ) pathway, however, it does not bind the IFNγ receptor, making its mode-of-action distinct from SOCS3. These findings reveal the mechanism used by SOCS1 to inhibit signalling by inflammatory cytokines.


    Organizational Affiliation

    The University of Melbourne, Royal Parade, Parkville, VIC, 3050, Australia. babon@wehi.edu.au.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Elongin-B
B, E
118Homo sapiensMutation(s): 0 
Gene Names: ELOBTCEB2
Find proteins for Q15370 (Homo sapiens)
Go to UniProtKB:  Q15370
NIH Common Fund Data Resources
PHAROS  Q15370
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
GP130 peptide fragment
G
10Homo sapiensMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Elongin-C
C, F
96Homo sapiensMutation(s): 0 
Gene Names: ELOCTCEB1
Find proteins for Q15369 (Homo sapiens)
Go to UniProtKB:  Q15369
NIH Common Fund Data Resources
PHAROS  Q15369

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Suppressor of Cytokine Signalling 1
A, D
164Xenopus laevisMutation(s): 0 
Gene Names: socs1SOCS1XELAEV_18045139mg
Find proteins for C0LEJ4 (Xenopus laevis)
Go to UniProtKB:  C0LEJ4
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
G
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.237 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.122α = 90
b = 79.996β = 90
c = 132.747γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Council VictoriaAustralia1065180

Revision History 

  • Version 1.0: 2018-05-02
    Type: Initial release