1WYW

Crystal Structure of SUMO1-conjugated thymine DNA glycosylase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.205 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal structure of thymine DNA glycosylase conjugated to SUMO-1.

Baba, D., Maita, N., Jee, J.G., Uchimura, Y., Saitoh, H., Sugasawa, K., Hanaoka, F., Tochio, H., Hiroaki, H., Shirakawa, M.

(2005) Nature 435: 979-982

  • DOI: 10.1038/nature03634
  • Primary Citation of Related Structures:  
    1WYW

  • PubMed Abstract: 

    • Members of the small ubiquitin-like modifier (SUMO) family can be covalently attached to the lysine residue of a target protein through an enzymatic pathway similar to that used in ubiquitin conjugation, and are involved in various cellular events that do not rely on degradative signalling via the proteasome or lysosome ...

    Members of the small ubiquitin-like modifier (SUMO) family can be covalently attached to the lysine residue of a target protein through an enzymatic pathway similar to that used in ubiquitin conjugation, and are involved in various cellular events that do not rely on degradative signalling via the proteasome or lysosome. However, little is known about the molecular mechanisms of SUMO-modification-induced protein functional transfer. During DNA mismatch repair, SUMO conjugation of the uracil/thymine DNA glycosylase TDG promotes the release of TDG from the abasic (AP) site created after base excision, and coordinates its transfer to AP endonuclease 1, which catalyses the next step in the repair pathway. Here we report the crystal structure of the central region of human TDG conjugated to SUMO-1 at 2.1 A resolution. The structure reveals a helix protruding from the protein surface, which presumably interferes with the product DNA and thus promotes the dissociation of TDG from the DNA molecule. This helix is formed by covalent and non-covalent contacts between TDG and SUMO-1. The non-covalent contacts are also essential for release from the product DNA, as verified by mutagenesis.

    Organizational Affiliation: 

    Graduate School of Integrated Science, Yokohama City University, Yokohama 230-0045, Japan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
G/T mismatch-specific thymine DNA glycosylaseA230Homo sapiensMutation(s): 0 
Gene Names: TDG
EC: 3.2.2 (PDB Primary Data), 3.2.2.29 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q13569 (Homo sapiens)
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Go to UniProtKB:  Q13569
PHAROS:  Q13569
GTEx:  ENSG00000139372 
Entity Groups  
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UniProt GroupQ13569
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquitin-like protein SMT3CB97Homo sapiensMutation(s): 0 
Gene Names: SUMO1, SMT3C, SMT3H3, UBL1, OK/SW-cl.43
UniProt & NIH Common Fund Data Resources
Find proteins for P63165 (Homo sapiens)
Explore P63165 
Go to UniProtKB:  P63165
PHAROS:  P63165
GTEx:  ENSG00000116030 
Entity Groups  
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UniProt GroupP63165
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.205 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.212α = 90
b = 70.42β = 90
c = 106.434γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing
CNSrefinement
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-06-21
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance