2XQZ

Neutron structure of the perdeuterated Toho-1 R274N R276N double mutant beta-lactamase


Experimental Data Snapshot

  • Method: NEUTRON DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 

wwPDB Validation 3D Report Full Report


This is version 2.1 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
  • Structures With Same Primary Citation

  • 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
BETA-LACTAMSE TOHO-1A260Escherichia coliMutation(s): 2 
Gene Names: bla
EC: 3.5.2.6
Find proteins for Q47066 (Escherichia coli)
Explore Q47066 
Go to UniProtKB:  Q47066
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: NEUTRON DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.956α = 90
b = 72.956β = 90
c = 98.526γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
LAUEGENdata reduction
LAUEGENdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-12-22
    Type: Initial release
  • Version 2.0: 2017-12-27
    Changes: Advisory, Atomic model, Derived calculations, Other
  • Version 2.1: 2018-01-31
    Changes: Data collection