5FA1

The structure of the beta-3-deoxy-D-manno-oct-2-ulosonic acid transferase domain of WbbB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Bacterial beta-Kdo glycosyltransferases represent a new glycosyltransferase family (GT99).

Ovchinnikova, O.G.Mallette, E.Koizumi, A.Lowary, T.L.Kimber, M.S.Whitfield, C.

(2016) Proc. Natl. Acad. Sci. U.S.A. 113: E3120-E3129

  • DOI: 10.1073/pnas.1603146113
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Kdo (3-deoxy-d-manno-oct-2-ulosonic acid) is an eight-carbon sugar mostly confined to Gram-negative bacteria. It is often involved in attaching surface polysaccharides to their lipid anchors. α-Kdo provides a bridge between lipid A and the core oligo ...

    Kdo (3-deoxy-d-manno-oct-2-ulosonic acid) is an eight-carbon sugar mostly confined to Gram-negative bacteria. It is often involved in attaching surface polysaccharides to their lipid anchors. α-Kdo provides a bridge between lipid A and the core oligosaccharide in all bacterial LPSs, whereas an oligosaccharide of β-Kdo residues links "group 2" capsular polysaccharides to (lyso)phosphatidylglycerol. β-Kdo is also found in a small number of other bacterial polysaccharides. The structure and function of the prototypical cytidine monophosphate-Kdo-dependent α-Kdo glycosyltransferase from LPS assembly is well characterized. In contrast, the β-Kdo counterparts were not identified as glycosyltransferase enzymes by bioinformatics tools and were not represented among the 98 currently recognized glycosyltransferase families in the Carbohydrate-Active Enzymes database. We report the crystallographic structure and function of a prototype β-Kdo GT from WbbB, a modular protein participating in LPS O-antigen synthesis in Raoultella terrigena The β-Kdo GT has dual Rossmann-fold motifs typical of GT-B enzymes, but extensive deletions, insertions, and rearrangements result in a unique architecture that makes it a prototype for a new GT family (GT99). The cytidine monophosphate-binding site in the C-terminal α/β domain closely resembles the corresponding site in bacterial sialyltransferases, suggesting an evolutionary connection that is not immediately evident from the overall fold or sequence similarities.


    Organizational Affiliation

    Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, Canada N1G 2W1;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative N-acetyl glucosaminyl transferase
A, B
410Raoultella terrigenaMutation(s): 0 
Gene Names: wbbB
Find proteins for Q6U8B0 (Raoultella terrigena)
Go to UniProtKB:  Q6U8B0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C5P
Query on C5P

Download SDF File 
Download CCD File 
A, B
CYTIDINE-5'-MONOPHOSPHATE
C9 H14 N3 O8 P
IERHLVCPSMICTF-XVFCMESISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.171 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 92.750α = 90.00
b = 159.390β = 90.00
c = 120.040γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
GlycoNETCanadaAM-4

Revision History 

  • Version 1.0: 2016-05-18
    Type: Initial release
  • Version 1.1: 2018-04-25
    Type: Data collection, Database references, Derived calculations