2JZ3

SOCS box elonginBC ternary complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The SOCS box domain of SOCS3: structure and interaction with the elonginBC-cullin5 ubiquitin ligase

Babon, J.J.Sabo, J.K.Soetopo, A.Yao, S.Bailey, M.F.Zhang, J.-G.Nicola, N.A.Norton, R.S.

(2008) J.Mol.Biol. 381: 928-940

  • DOI: 10.1016/j.jmb.2008.06.038

  • PubMed Abstract: 
  • Suppressor of cytokine signalling 3 (SOCS3) is responsible for regulating the cellular response to a variety of cytokines, including interleukin 6 and leukaemia inhibitory factor. Identification of the SOCS box domain led to the hypothesis that SOCS3 ...

    Suppressor of cytokine signalling 3 (SOCS3) is responsible for regulating the cellular response to a variety of cytokines, including interleukin 6 and leukaemia inhibitory factor. Identification of the SOCS box domain led to the hypothesis that SOCS3 can associate with functional E3 ubiquitin ligases and thereby induce the degradation of bound signalling proteins. This model relies upon an interaction between the SOCS box, elonginBC and a cullin protein that forms the E3 ligase scaffold. We have investigated this interaction in vitro using purified components and show that SOCS3 binds to elonginBC and cullin5 with high affinity. The SOCS3-elonginBC interaction was further characterised by determining the solution structure of the SOCS box-elonginBC ternary complex and by deletion and alanine scanning mutagenesis of the SOCS box. These studies revealed that conformational flexibility is a key feature of the SOCS-elonginBC interaction. In particular, the SOCS box is disordered in isolation and only becomes structured upon elonginBC association. The interaction depends upon the first 12 residues of the SOCS box domain and particularly on a deeply buried, conserved leucine. The SOCS box, when bound to elonginBC, binds tightly to cullin5 with 100 nM affinity. Domains upstream of the SOCS box are not required for elonginBC or cullin5 association, indicating that the SOCS box acts as an independent binding domain capable of recruiting elonginBC and cullin5 to promote E3 ligase formation.


    Organizational Affiliation

    Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia. babon@wehi.edu.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Suppressor of cytokine signaling 3
A
40Mus musculusMutation(s): 0 
Gene Names: Socs3 (Cis3, Cish3)
Find proteins for O35718 (Mus musculus)
Go to UniProtKB:  O35718
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transcription elongation factor B polypeptide 2
B
118Homo sapiensMutation(s): 0 
Gene Names: ELOB (TCEB2)
Find proteins for Q15370 (Homo sapiens)
Go to Gene View: ELOB
Go to UniProtKB:  Q15370
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Transcription elongation factor B polypeptide 1
C
96Mus musculusMutation(s): 0 
Gene Names: Eloc (Tceb1)
Find proteins for P83940 (Mus musculus)
Go to UniProtKB:  P83940
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2JZ3 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-09-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance