2XR0

Room temperature X-ray structure of the perdeuterated Toho-1 R274N R276N double mutant beta-lactamase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.133 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Active Site Protonation States of Perdeuterated Toho-1 Beta-Lactamase Determined by Neutron Diffraction Support a Role for Glu166 as the General Base in Acylation.

Tomanicek, S.J.Wang, K.K.Weiss, K.L.Blakeley, M.P.Cooper, J.Chen, Y.Coates, L.

(2011) FEBS Lett. 585: 364

  • DOI: 10.1016/j.febslet.2010.12.017
  • Primary Citation of Related Structures:  2XQZ

  • PubMed Abstract: 
  • Room temperature neutron diffraction data of the fully perdeuterated Toho-1 R274N/R276N double mutant β-lactamase in the apo form were used to visualize deuterium atoms within the active site of the enzyme. This perdeuterated neutron structure of the ...

    Room temperature neutron diffraction data of the fully perdeuterated Toho-1 R274N/R276N double mutant β-lactamase in the apo form were used to visualize deuterium atoms within the active site of the enzyme. This perdeuterated neutron structure of the Toho-1 R274N/R276N reveals the clearest picture yet of the ground-state active site protonation states and the complete hydrogen-bonding network in a β-lactamase enzyme. The ground-state active site protonation states detailed in this neutron diffraction study are consistent with previous high-resolution X-ray studies that support the role of Glu166 as the general base during the acylation reaction in the class A β-lactamase reaction pathway.


    Organizational Affiliation

    Oak Ridge National Laboratory, Neutron Scattering Science Division, Oak Ridge, TN 37831, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TOHO-1 BETA-LACTAMASE
A
260Escherichia coliGene Names: bla
EC: 3.5.2.6
Find proteins for Q47066 (Escherichia coli)
Go to UniProtKB:  Q47066
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.133 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 73.500α = 90.00
b = 73.500β = 90.00
c = 99.330γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
PHENIXrefinement
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-12-22
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance