1SFE

ADA O6-METHYLGUANINE-DNA METHYLTRANSFERASE FROM ESCHERICHIA COLI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a suicidal DNA repair protein: the Ada O6-methylguanine-DNA methyltransferase from E. coli.

Moore, M.H.Gulbis, J.M.Dodson, E.J.Demple, B.Moody, P.C.

(1994) EMBO J. 13: 1495-1501

  • Also Cited By: 1QNT

  • PubMed Abstract: 
  • The mutagenic and carcinogenic effects of simple alkylating agents are mainly due to methylation at the O6 position of guanine in DNA. O6-methylguanine directs the incorporation of either thymine or cytosine without blocking DNA replication, resultin ...

    The mutagenic and carcinogenic effects of simple alkylating agents are mainly due to methylation at the O6 position of guanine in DNA. O6-methylguanine directs the incorporation of either thymine or cytosine without blocking DNA replication, resulting in GC to AT transition mutations. In prokaryotic and eukaryotic cells antimutagenic repair is effected by direct reversal of this DNA damage. A suicidal methyltransferase repair protein removes the methyl group from DNA to one of its own cysteine residues. The resulting self-methylation of the active site cysteine renders the protein inactive. Here we report the X-ray structure of the 19 kDa C-terminal domain of the Escherichia coli ada gene product, the prototype of these suicidal methyltransferases. In the crystal structure the active site cysteine is buried. We propose a model for the significant conformational change that the protein must undergo in order to bind DNA and effect methyl transfer.


    Related Citations: 
    • Crystallization of O6-Methylguanine-DNA Methyltransferase from Escherichia Coli
      Moody, P.C.,Demple, B.
      (1988) J.Mol.Biol. 200: 751
    • Crystal Structure of E.Coli O6-Methylguanine-DNA Methyltransferase
      Moody, P.C.E.,Moore, M.H.
      (1995) Novel Approaches in Anticancer Drug Design : Molecular Modelling--New Treatment Strategies (in: Contrib.Oncol., V.49) --: 16


    Organizational Affiliation

    Department of Chemistry, University of York, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ADA O6-METHYLGUANINE-DNA METHYLTRANSFERASE
A
180Escherichia coli (strain K12)Gene Names: ada
EC: 2.1.1.n11, 2.1.1.63
Find proteins for P06134 (Escherichia coli (strain K12))
Go to UniProtKB:  P06134
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Work: 0.219 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 46.200α = 90.00
b = 45.950β = 114.06
c = 46.400γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-12-23
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance