6QK4

Lytic transglycosylase, LtgG, of Burkholderia pseudomallei.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history. 


Literature

The lytic transglycosylase, LtgG, controls cell morphology and virulence in Burkholderia pseudomallei.

Jenkins, C.H., Wallis, R., Allcock, N., Barnes, K.B., Richards, M.I., Auty, J.M., Galyov, E.E., Harding, S.V., Mukamolova, G.V.

(2019) Sci Rep 9: 11060-11060

  • DOI: 10.1038/s41598-019-47483-z
  • Primary Citation of Related Structures:  
    6QK4

  • PubMed Abstract: 

    • Burkholderia pseudomallei is the causative agent of the tropical disease melioidosis. Its genome encodes an arsenal of virulence factors that allow it, when required, to switch from a soil dwelling bacterium to a deadly intracellular pathogen. With a high intrinsic resistance to antibiotics and the ability to overcome challenges from the host immune system, there is an increasing requirement for new antibiotics and a greater understanding into the molecular mechanisms of B ...

    Burkholderia pseudomallei is the causative agent of the tropical disease melioidosis. Its genome encodes an arsenal of virulence factors that allow it, when required, to switch from a soil dwelling bacterium to a deadly intracellular pathogen. With a high intrinsic resistance to antibiotics and the ability to overcome challenges from the host immune system, there is an increasing requirement for new antibiotics and a greater understanding into the molecular mechanisms of B. pseudomallei virulence and dormancy. The peptidoglycan remodeling enzymes, lytic transglycosylases (Ltgs) are potential targets for such new antibiotics. Ltgs cleave the glycosidic bonds within bacterial peptidoglycan allowing for the insertion of peptidoglycan precursors during cell growth and division, and cell membrane spanning structures such as flagella and secretion systems. Using bioinformatic analysis we have identified 8 putative Ltgs in B. pseudomallei K96243. We aimed to investigate one of these Ltgs, LtgG (BPSL3046) through the generation of deletion mutants and biochemical analysis. We have shown that LtgG is a key contributor to cellular morphology, division, motility and virulence in BALB/c mice. We have determined the crystal structure of LtgG and have identified various amino acids likely to be important in peptidoglycan binding and catalytic activity. Recombinant protein assays and complementation studies using LtgG containing a site directed mutation in aspartate 343, confirmed the essentiality of this amino acid in the function of LtgG.

    Organizational Affiliation: 

    Department of Respiratory Sciences, University of Leicester, Leicester, UK. gvm4@leicester.ac.uk.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Membrane-bound lytic murein transglycosylase AA [auth B]348Burkholderia pseudomalleiMutation(s): 0 
Gene Names: mltA, CXQ84_03095, DP49_5753, ERS013345_03240
EC: 4.2.2
UniProt
Find proteins for Q63QH7 (Burkholderia pseudomallei (strain K96243))
Explore Q63QH7 
Go to UniProtKB:  Q63QH7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ63QH7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.57α = 90
b = 59.57β = 90
c = 168.28γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-08-14
    Type: Initial release