2ZQ8

Apo structure of class a beta-lactamase Toho-1 R274N/R276N double mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.03 Å
  • R-Value Free: 0.148 
  • R-Value Work: 0.138 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Improvement of crystal quality by surface mutations of beta-lactamase Toho-1

Shimamura, T.Nitanai, Y.Uchiyama, T.Matsuzawa, H.

(2009) Acta Crystallogr.,Sect.F 65: 379-382

  • DOI: 10.1107/S1744309109008240

  • PubMed Abstract: 
  • The beta-lactamase Toho-1 exhibits a strong tendency to form merohedrally twinned crystals. Here, the crystal quality of Toho-1 was improved by using surface modification to remove a sulfate ion involved in crystal packing. The surface-modified Toho- ...

    The beta-lactamase Toho-1 exhibits a strong tendency to form merohedrally twinned crystals. Here, the crystal quality of Toho-1 was improved by using surface modification to remove a sulfate ion involved in crystal packing. The surface-modified Toho-1 variant (R274N/R276N) was crystallized under similar conditions to those used for wild-type Toho-1. R274N/R276N did not form merohedrally twinned crystals. The crystals diffracted to a significantly higher resolution (approximately 0.97 A) than the wild-type crystals (1.65 A); they belonged to the same space group and had almost identical unit-cell parameters to those of wild-type Toho-1.


    Organizational Affiliation

    RIKEN SPring-8 Center, Harima Institute, Kouto, Sayo, Hyogo 679-5148, Japan. t.shimamura@mfour.med.kyoto-u.ac.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-lactamase Toho-1
A
262Escherichia coliMutation(s): 2 
Gene 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: 1.03 Å
  • R-Value Free: 0.148 
  • R-Value Work: 0.138 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 72.511α = 90.00
b = 72.511β = 90.00
c = 97.477γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
MOLREPphasing
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance