Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 74.54 kDa 
• Atom Count: 5363 
• Modelled Residue Count: 662 
• Deposited Residue Count: 681 
• Unique protein chains: 1

4C7V

Apo Transketolase from Lactobacillus salivarius at 2.2A resolution

• PDB DOI: 10.2210/pdb4C7V/pdb

• Classification: TRANSFERASE
• Organism(s): Ligilactobacillus salivarius UCC118
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2013-09-26 Released: 2014-10-08 
• Deposition Author(s): Lobley, C.M.C., Lukacik, P., Bumann, M., Aller, P., Douangamath, A., O'Toole, P.W., Walsh, M.A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.219 
• R-Value Work: 0.162 
• R-Value Observed: 0.165 

Literature

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

• PubMed: 26457526 
• DOI: 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.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TRANSKETOLASE	A	681	Ligilactobacillus salivarius UCC118	Mutation(s): 0  Gene Names: tktA, LSL_1946 EC: 2.2.1.1
UniProt
Find proteins for Q1WQU8 (Ligilactobacillus salivarius (strain UCC118)) Explore Q1WQU8  Go to UniProtKB:  Q1WQU8

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 76.15	α = 90
b = 76.15	β = 90
c = 194.51	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
xia2	data reduction
SCALA	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-09-26 
• Released Date: 2014-10-08 
Deposition Author(s): Lobley, C.M.C., Lukacik, P., Bumann, M., Aller, P., Douangamath, A., O'Toole, P.W., Walsh, M.A.

Revision History  

• 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