6K5T

Complex of SUMO1 and phosphorylated hcmv protein IE2


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • 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

Casein kinase-2-mediated phosphorylation increases the SUMO-dependent activity of the cytomegalovirus transactivator IE2.

Tripathi, V.Chatterjee, K.S.Das, R.

(2019) J Biol Chem 294: 14546-14561

  • DOI: 10.1074/jbc.RA119.009601
  • Primary Citation of Related Structures:  
    6K5R, 6K5T

  • PubMed Abstract: 
  • Many viral factors manipulate the host post-translational modification (PTM) machinery for efficient viral replication. In particular, phosphorylation and SUMOylation can distinctly regulate the activity of the human cytomegalovirus (HCMV) transactiv ...

    Many viral factors manipulate the host post-translational modification (PTM) machinery for efficient viral replication. In particular, phosphorylation and SUMOylation can distinctly regulate the activity of the human cytomegalovirus (HCMV) transactivator immediate early 2 (IE2). However, the molecular mechanism of this process is unknown. Using various structural, biochemical, and cell-based approaches, here we uncovered that IE2 exploits a cross-talk between phosphorylation and SUMOylation. A scan for small ubiquitin-like modifier (SUMO)-interacting motifs (SIMs) revealed two SIMs in IE2, and a real-time SUMOylation assay indicated that the N-terminal SIM (IE2-SIM1) enhances IE2 SUMOylation up to 4-fold. Kinetic analysis and structural studies disclosed that IE2 is a SUMO cis- E3 ligase. We also found that two putative casein kinase 2 (CK2) sites adjacent to IE2-SIM1 are phosphorylated in vitro and in cells. The phosphorylation drastically increased IE2-SUMO affinity, IE2 SUMOylation, and cis- E3 activity of IE2. Additional salt bridges between the phosphoserines and SUMO accounted for the increased IE2-SUMO affinity. Phosphorylation also enhanced the SUMO-dependent transactivation activity and auto-repression activity of IE2. Together, our findings highlight a novel mechanism whereby SUMOylation and phosphorylation of the viral cis- E3 ligase and transactivator protein IE2 work in tandem to enable transcriptional regulation of viral gene.


    Organizational Affiliation

    National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru-560065, India rana@ncbs.res.in.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Small ubiquitin-related modifier 1A77Homo sapiensMutation(s): 0 
Gene Names: SUMO1SMT3CSMT3H3UBL1OK/SW-cl.43
Find proteins for P63165 (Homo sapiens)
Explore P63165 
Go to UniProtKB:  P63165
NIH Common Fund Data Resources
PHAROS  P63165
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
12-mer from Viral transcription factor IE2B12Human herpesvirus 5 strain AD169Mutation(s): 0 
Gene Names: UL122
Find proteins for P19893 (Human cytomegalovirus (strain AD169))
Explore P19893 
Go to UniProtKB:  P19893
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
BL-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 6K5T Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-08-07
    Type: Initial release
  • Version 1.1: 2019-12-25
    Changes: Database references