5MU5

Structure of MAf glycosyltransferase from Magnetospirillum magneticum AMB-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.187 

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

  • 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 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

    Aix Marseille Univ, CNRS, AFMB UMR7257, Marseille 13288, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein
A
666Magnetospirillum magneticum (strain AMB-1 / ATCC 700264)Mutation(s): 0 
Find proteins for Q2W9I6 (Magnetospirillum magneticum (strain AMB-1 / ATCC 700264))
Go to UniProtKB:  Q2W9I6
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
PG4
Query on PG4

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Download CCD File 
A
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

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Download CCD File 
A
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.187 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 117.447α = 90.00
b = 126.852β = 90.00
c = 64.601γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
REFMACrefinement
CRANKphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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