5I7N

MaoC-like dehydratase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.161 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Deletion of a dehydratase important for intracellular growth and cording renders rough Mycobacterium abscessus avirulent.

Halloum, I.Carrere-Kremer, S.Blaise, M.Viljoen, A.Bernut, A.Le Moigne, V.Vilcheze, C.Guerardel, Y.Lutfalla, G.Herrmann, J.L.Jacobs, W.R.Kremer, L.

(2016) Proc.Natl.Acad.Sci.USA 113: E4228-E4237

  • DOI: 10.1073/pnas.1605477113

  • PubMed Abstract: 
  • Mycobacterium abscessus (Mabs) is a rapidly growing Mycobacterium and an emerging pathogen in humans. Transitioning from a smooth (S) high-glycopeptidolipid (GPL) producer to a rough (R) low-GPL producer is associated with increased virulence in zebr ...

    Mycobacterium abscessus (Mabs) is a rapidly growing Mycobacterium and an emerging pathogen in humans. Transitioning from a smooth (S) high-glycopeptidolipid (GPL) producer to a rough (R) low-GPL producer is associated with increased virulence in zebrafish, which involves the formation of massive serpentine cords, abscesses, and rapid larval death. Generating a cord-deficient Mabs mutant would allow us to address the contribution of cording in the physiopathological signs of the R variant. Herein, a deletion mutant of MAB_4780, encoding a dehydratase, distinct from the β-hydroxyacyl-ACP dehydratase HadABC complex, was constructed in the R morphotype. This mutant exhibited an alteration of the mycolic acid composition and a pronounced defect in cording. This correlated with an extremely attenuated phenotype not only in wild-type but also in immunocompromised zebrafish embryos lacking either macrophages or neutrophils. The abolition of granuloma formation in embryos infected with the dehydratase mutant was associated with a failure to replicate in macrophages, presumably due to limited inhibition of the phagolysosomal fusion. Overall, these results indicate that MAB_4780 is required for Mabs to successfully establish acute and lethal infections. Therefore, targeting MAB_4780 may represent an attractive antivirulence strategy to control Mabs infections, refractory to most standard chemotherapeutic interventions. The combination of a dehydratase assay with a high-resolution crystal structure of MAB_4780 opens the way to identify such specific inhibitors.


    Organizational Affiliation

    Centre d'études d'agents Pathogènes et Biotechnologies pour la Santé (CPBS), CNRS Formation de Recherche en Evolution 3689, 34293 Montpellier, France;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MaoC-like dehydratase
A
343Mycobacterium abscessus (strain ATCC 19977 / DSM 44196 / CIP 104536 / JCM 13569 / NCTC 13031 / TMC 1543)Mutation(s): 0 
Find proteins for B1MM63 (Mycobacterium abscessus (strain ATCC 19977 / DSM 44196 / CIP 104536 / JCM 13569 / NCTC 13031 / TMC 1543))
Go to UniProtKB:  B1MM63
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.161 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 83.320α = 90.00
b = 83.320β = 90.00
c = 124.390γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
PHENIXrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-02-18 
  • Released Date: 2016-07-06 
  • Deposition Author(s): Blaise, M.

Revision History 

  • Version 1.0: 2016-07-06
    Type: Initial release
  • Version 1.1: 2016-07-20
    Type: Database references
  • Version 1.2: 2016-08-03
    Type: Database references