4O0Q

Apo structure of a methyltransferase component involved in O-demethylation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.92 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structures of the methyltransferase component of Desulfitobacterium hafniense DCB-2 O-demethylase shed light on methyltetrahydrofolate formation

Sjuts, H.Dunstan, M.S.Fisher, K.Leys, D.

(2015) Acta Crystallogr.,Sect.D 71: 1900-1908

  • DOI: 10.1107/S1399004715013061
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • O-Demethylation by acetogenic or organohalide-respiring bacteria leads to the formation of methyltetrahydrofolate from aromatic methyl ethers. O-Demethylases, which are cobalamin-dependent, three-component enzyme systems, catalyse methyl-group transf ...

    O-Demethylation by acetogenic or organohalide-respiring bacteria leads to the formation of methyltetrahydrofolate from aromatic methyl ethers. O-Demethylases, which are cobalamin-dependent, three-component enzyme systems, catalyse methyl-group transfers from aromatic methyl ethers to tetrahydrofolate via methylcobalamin intermediates. In this study, crystal structures of the tetrahydrofolate-binding methyltransferase module from a Desulfitobacterium hafniense DCB-2 O-demethylase were determined both in complex with tetrahydrofolate and the product methyltetrahydrofolate. While these structures are similar to previously determined methyltransferase structures, the position of key active-site residues is subtly altered. A strictly conserved Asn is displaced to establish a putative proton-transfer network between the substrate N5 and solvent. It is proposed that this supports the efficient catalysis of methyltetrahydrofolate formation, which is necessary for efficient O-demethylation.


    Organizational Affiliation

    Manchester Institute of Biotechnology, Faculty of Life Sciences, University of Manchester, 131 Princess Street, Manchester M1 7DN, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dihydropteroate synthase DHPS
A, B
290Desulfitobacterium hafniense (strain DCB-2 / DSM 10664)Mutation(s): 0 
Find proteins for B8FW00 (Desulfitobacterium hafniense (strain DCB-2 / DSM 10664))
Go to UniProtKB:  B8FW00
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.92 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.182 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 90.670α = 90.00
b = 119.070β = 90.00
c = 58.150γ = 90.00
Software Package:
Software NamePurpose
xia2data scaling
REFMACrefinement
xia2data reduction
BALBESphasing
GDAdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-01-21
    Type: Initial release
  • Version 1.1: 2015-09-09
    Type: Database references
  • Version 1.2: 2015-09-16
    Type: Database references