2KQS

Phosphorylation of SUMO-interacting motif by CK2 enhances Daxx SUMO binding activity


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and functional roles of Daxx SIM phosphorylation in SUMO paralog-selective binding and apoptosis modulation.

Chang, C.C.Naik, M.T.Huang, Y.S.Jeng, J.C.Liao, P.H.Kuo, H.Y.Ho, C.C.Hsieh, Y.L.Lin, C.H.Huang, N.J.Naik, N.M.Kung, C.C.Lin, S.Y.Chen, R.H.Chang, K.S.Huang, T.H.Shih, H.M.

(2011) Mol.Cell 42: 62-74

  • DOI: 10.1016/j.molcel.2011.02.022

  • PubMed Abstract: 
  • Small ubiquitin-like modifier (SUMO) conjugation and interaction are increasingly associated with various cellular processes. However, little is known about the cellular signaling mechanisms that regulate proteins for distinct SUMO paralog conjugatio ...

    Small ubiquitin-like modifier (SUMO) conjugation and interaction are increasingly associated with various cellular processes. However, little is known about the cellular signaling mechanisms that regulate proteins for distinct SUMO paralog conjugation and interactions. Using the transcriptional coregulator Daxx as a model, we show that SUMO paralog-selective binding and conjugation are regulated by phosphorylation of the Daxx SUMO-interacting motif (SIM). NMR structural studies show that Daxx (732)E-I-I-V-L-S-D-S-D(740) is a bona fide SIM that binds to SUMO-1 in a parallel orientation. Daxx-SIM is phosphorylated by CK2 kinase at residues S737 and S739. Phosphorylation promotes Daxx-SIM binding affinity toward SUMO-1 over SUMO-2/3, causing Daxx preference for SUMO-1 conjugation and interaction with SUMO-1-modified factors. Furthermore, Daxx-SIM phosphorylation enhances Daxx to sensitize stress-induced cell apoptosis via antiapoptotic gene repression. Our findings provide structural insights into the Daxx-SIM:SUMO-1 complex, a model of SIM phosphorylation-enhanced SUMO paralog-selective modification and interaction, and phosphorylation-regulated Daxx function in apoptosis.


    Organizational Affiliation

    Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Small ubiquitin-related modifier 1
A
99Homo sapiensMutation(s): 0 
Gene Names: SUMO1 (SMT3C, SMT3H3, UBL1)
Find proteins for P63165 (Homo sapiens)
Go to Gene View: SUMO1
Go to UniProtKB:  P63165
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Death domain-associated protein 6
B
22Homo sapiensMutation(s): 0 
Gene Names: DAXX (BING2, DAP6)
Find proteins for Q9UER7 (Homo sapiens)
Go to Gene View: DAXX
Go to UniProtKB:  Q9UER7
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2KQS Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-12-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-08-21
    Type: Database references