4LE5

Structure of an Unusual S-adenosylmethionine synthetase from Campylobacter jejuni


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of an unusual S-adenosylmethionine synthetase from Campylobacter jejuni.

Zano, S.P.Pavlovsky, A.G.Viola, R.E.

(2014) Acta Crystallogr.,Sect.D 70: 442-450

  • DOI: 10.1107/S139900471303023X

  • PubMed Abstract: 
  • S-Adenosylmethionine (AdoMet) participates in a wide range of methylation and other group-transfer reactions and also serves as the precursor for two groups of quorum-sensing molecules that function as regulators of the production of virulence factor ...

    S-Adenosylmethionine (AdoMet) participates in a wide range of methylation and other group-transfer reactions and also serves as the precursor for two groups of quorum-sensing molecules that function as regulators of the production of virulence factors in Gram-negative bacteria. The synthesis of AdoMet is catalyzed by AdoMet synthetases (MATs), a ubiquitous family of enzymes found in species ranging from microorganisms to mammals. The AdoMet synthetase from the bacterium Campylobacter jejuni (cjMAT) is an outlier among this homologous enzyme family, with lower sequence identity, numerous insertions and substitutions, and higher catalytic activity compared with other bacterial MATs. Alterations in the structure of this enzyme provide an explanation for its unusual dimeric quaternary structure relative to the other MATs. Taken together with several active-site substitutions, this new structure provides insights into its improved kinetic properties with alternative substrates.


    Organizational Affiliation

    Department of Chemistry, The University of Toledo, Toledo, OH 43606, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
S-adenosylmethionine synthetase
A, B
430N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 61.655α = 90.00
b = 113.075β = 116.49
c = 62.179γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
HKL-2000data reduction
MOLREPphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-02-12
    Type: Initial release
  • Version 1.1: 2014-09-24
    Type: Database references
  • Version 1.2: 2014-11-12
    Type: Structure summary