Apo Transketolase from Lactobacillus salivarius at 2.2A resolution

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.165 

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This is version 1.2 of the entry. See complete history


High Resolution Crystal Structures of Lactobacillus Salivarius Transketolase in the Presence and Absence of Thiamine Pyrophosphate

Lukacik, P.Lobley, C.M.C.Bumann, M.Arena De Souza, V.Owens, R.J.O'Toole, P.W.Walsh, M.A.

(2015) Acta Crystallogr Sect F Struct Biol Cryst Commun 71: 1327

  • DOI: https://doi.org/10.1107/S2053230X1501657X
  • Primary Citation of Related Structures:  
    4C7V, 4C7X

  • PubMed Abstract: 

    Probiotic bacterial strains have been shown to enhance the health of the host through a range of mechanisms including colonization, resistance against pathogens, secretion of antimicrobial compounds and modulation of the activity of the innate immune system. Lactobacillus salivarius UCC118 is a well characterized probiotic strain which survives intestinal transit and has many desirable host-interaction properties. Probiotic bacteria display a wide range of catabolic activities, which determine their competitiveness in vivo. Some lactobacilli are heterofermentative and can metabolize pentoses, using a pathway in which transketolase and transaldolase are key enzymes. L. salivarius UCC118 is capable of pentose utilization because it encodes the key enzymes on a megaplasmid. The crystal structures of the megaplasmid-encoded transketolase with and without the enzyme cofactor thiamine pyrophosphate have been determined. Comparisons with other known transketolase structures reveal a high degree of structural conservation in both the catalytic site and the overall conformation. This work extends structural knowledge of the transketolases to the industrially and commercially important Lactobacillus genus.

  • Organizational Affiliation

    Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TRANSKETOLASE681Ligilactobacillus salivarius UCC118Mutation(s): 0 
Find proteins for Q1WQU8 (Ligilactobacillus salivarius (strain UCC118))
Explore Q1WQU8 
Go to UniProtKB:  Q1WQU8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ1WQU8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.165 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.15α = 90
b = 76.15β = 90
c = 194.51γ = 120
Software Package:
Software NamePurpose
xia2data reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-08
    Type: Initial release
  • Version 1.1: 2015-10-14
    Changes: Database references, Structure summary
  • Version 1.2: 2015-10-21
    Changes: Database references