5MU5

Structure of MAf glycosyltransferase from Magnetospirillum magneticum AMB-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Glycosylate and move! The glycosyltransferase Maf is involved in bacterial flagella formation.

Sulzenbacher, G.Roig-Zamboni, V.Lebrun, R.Guerardel, Y.Murat, D.Mansuelle, P.Yamakawa, N.Qian, X.X.Vincentelli, R.Bourne, Y.Wu, L.F.Alberto, F.

(2018) Environ Microbiol 20: 228-240

  • DOI: 10.1111/1462-2920.13975
  • Primary Citation of Related Structures:  
    5MU5

  • PubMed Abstract: 
  • The flagella of various Gram-negative bacteria are decorated with diverse glycan structures, amongst them nonulosonic acids related to the sialic acid family. Although nonulosonic sugar biosynthesis pathways have been dissected in various pathogens, the enzymes transferring the sugars onto flagellin are still poorly characterized ...

    The flagella of various Gram-negative bacteria are decorated with diverse glycan structures, amongst them nonulosonic acids related to the sialic acid family. Although nonulosonic sugar biosynthesis pathways have been dissected in various pathogens, the enzymes transferring the sugars onto flagellin are still poorly characterized. The deletion of genes coding for motility associated factors (Mafs) found in many pathogenic strains systematically gives rise to nonflagellated bacteria lacking specific nonulosonic sugars on the flagellins, therefore, relating Maf function to flagellin glycosylation and bacterial motility. We investigated the role of Maf from our model organism, Magnetospirillum magneticum AMB-1, in the glycosylation and formation of the flagellum. Deletion of the gene amb0685 coding for Maf produced a nonflagellated bacterium where the flagellin was still produced but no longer glycosylated. Our X-ray structure analysis revealed that the central domain of Maf exhibits similarity to sialyltransferases from Campylobacter jejuni. Glycan analysis suggested that the nonulosonic carbohydrate structure transferred is pseudaminic acid or a very close derivative. This work describes the importance of glycosylation in the formation of the bacterial flagellum and provides the first structural model for a member of a new bacterial glycosyltransferase family involved in nonulosonic acids transfer onto flagellins.


    Organizational Affiliation

    International Associated Laboratory of Evolution and Development of Magnetotactic Organisms (LIA-MagMC), Centre National de la Recherche Scientifique, Marseille 13402, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Uncharacterized proteinA666Magnetospirillum magneticum AMB-1Mutation(s): 0 
Gene Names: amb0685
UniProt
Find proteins for Q2W9I6 (Magnetospirillum magneticum (strain AMB-1 / ATCC 700264))
Explore Q2W9I6 
Go to UniProtKB:  Q2W9I6
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.447α = 90
b = 126.852β = 90
c = 64.601γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
CRANKphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-11-15
    Type: Initial release
  • Version 1.1: 2018-01-24
    Changes: Database references
  • Version 1.2: 2019-04-10
    Changes: Data collection, Source and taxonomy