2IZV

CRYSTAL STRUCTURE OF SOCS-4 IN COMPLEX WITH ELONGIN-B AND ELONGIN-C AT 2.55A RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the Socs4-Elonginb/C Complex Reveals a Distinct Socs Box Interface and the Molecular Basis for Socs-Dependent Egfr Degradation.

Bullock, A.N.Rodriguez, M.C.Debreczeni, J.E.Songyang, Z.Knapp, S.

(2007) Structure 15: 1493

  • DOI: 10.1016/j.str.2007.09.016

  • PubMed Abstract: 
  • Tyrosine kinase signaling is tightly controlled by negative feedback inhibitors including suppressors of cytokine signaling (SOCS). SOCS assemble as SH2 domain substrate recognition modules in ElonginB/C-cullin ubiquitin ligases. In accordance, SOCS4 ...

    Tyrosine kinase signaling is tightly controlled by negative feedback inhibitors including suppressors of cytokine signaling (SOCS). SOCS assemble as SH2 domain substrate recognition modules in ElonginB/C-cullin ubiquitin ligases. In accordance, SOCS4 reduces STAT3 signaling from EGFR through increased receptor degradation. Variable C-termini in SOCS4-SOCS7 exclude these family members from a SOCS2-type domain arrangement in which a strictly conserved C terminus determines domain packing. The structure of the SOCS4-ElonginC-ElonginB complex reveals a distinct SOCS structural class. The N-terminal ESS helix functionally replaces the CIS/SOCS1-SOCS3 family C terminus in a distinct SH2-SOCS box interface that facilitates further interdomain packing between the extended N- and C-terminal regions characteristic for this subfamily. Using peptide arrays and calorimetry the STAT3 site in EGFR (pY(1092)) was identified as a high affinity SOCS4 substrate (K(D) = 0.5 microM) revealing a mechanism for EGFR degradation. SOCS4 also bound JAK2 and KIT with low micromolar affinity, whereas SOCS2 was specific for GH-receptor.


    Organizational Affiliation

    University of Oxford, Structural Genomics Consortium, Botnar Research Centre, Oxford OX3 7LD, United Kingdom. alex.bullock@sgc.ox.ac.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SUPPRESSOR OF CYTOKINE SIGNALING 4
A
187Homo sapiensGene Names: SOCS4 (SOCS7)
Find proteins for Q8WXH5 (Homo sapiens)
Go to Gene View: SOCS4
Go to UniProtKB:  Q8WXH5
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 2
B
118Homo sapiensGene Names: TCEB2
Find proteins for Q15370 (Homo sapiens)
Go to UniProtKB:  Q15370
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 1
C
97Homo sapiensGene Names: TCEB1
Find proteins for Q15369 (Homo sapiens)
Go to UniProtKB:  Q15369
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.172 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 154.770α = 90.00
b = 154.770β = 90.00
c = 67.909γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-08-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2018-01-24
    Type: Structure summary