4AZS

High resolution (2.2 A) crystal structure of WbdD.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.179 

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Literature

Structure of Wbdd; a Bifunctional Kinase and Methyltransferase that Regulates the Chain Length of the O Antigen in Escherichia Coli O9A.

Hagelueken, G., Huang, H., Clarke, B.R., Lebl, T., Whitfield, C., Naismith, J.H.

(2012) Mol Microbiol 86: 730

  • DOI: 10.1111/mmi.12014
  • Primary Citation of Related Structures:  
    4AZS, 4AZT, 4AZV, 4AZW

  • PubMed Abstract: 

    • The Escherichia coli serotype O9a O-antigen polysaccharide (O-PS) is a model for glycan biosynthesis and export by the ATP-binding cassette transporter-dependent pathway. The polymannose O9a O-PS is synthesized as a polyprenol-linked glycan by mannosyltransferase enzymes located at the cytoplasmic membrane ...

    The Escherichia coli serotype O9a O-antigen polysaccharide (O-PS) is a model for glycan biosynthesis and export by the ATP-binding cassette transporter-dependent pathway. The polymannose O9a O-PS is synthesized as a polyprenol-linked glycan by mannosyltransferase enzymes located at the cytoplasmic membrane. The chain length of the O9a O-PS is tightly regulated by the WbdD enzyme. WbdD first phosphorylates the terminal non-reducing mannose of the O-PS and then methylates the phosphate, stopping polymerization. The 2.2 Å resolution structure of WbdD reveals a bacterial methyltransferase domain joined to a eukaryotic kinase domain. The kinase domain is again fused to an extended C-terminal coiled-coil domain reminiscent of eukaryotic DMPK (Myotonic Dystrophy Protein Kinase) family kinases such as Rho-associated protein kinase (ROCK). WbdD phosphorylates 2-α-d-mannosyl-d-mannose (2α-MB), a short mimic of the O9a polymer. Mutagenesis identifies those residues important in catalysis and substrate recognition and the in vivo phenotypes of these mutants are used to dissect the termination reaction. We have determined the structures of co-complexes of WbdD with two known eukaryotic protein kinase inhibitors. Although these are potent inhibitors in vitro, they do not show any in vivo activity. The structures reveal new insight into O-PS chain-length regulation in this important model system.

    Organizational Affiliation: 

    Biomedical Sciences Research Complex, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, UK.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
METHYLTRANSFERASE WBDDA569Escherichia coliMutation(s): 0 
Gene Names: wbdD, ORF708
EC: 2.1.1.294 (UniProt), 2.7.1.181 (UniProt)
UniProt
Find proteins for Q47592 (Escherichia coli)
Explore Q47592 
Go to UniProtKB:  Q47592
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAM (Subject of Investigation/LOI)
Query on SAM
Download Ideal Coordinates CCD File 
C [auth A]S-ADENOSYLMETHIONINE
C15 H22 N6 O5 S
MEFKEPWMEQBLKI-FCKMPRQPSA-N		 Ligand Interaction
AMP (Subject of Investigation/LOI)
Query on AMP
Download Ideal Coordinates CCD File 
B [auth A]ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N		 Ligand Interaction
SO4
Query on SO4
Download Ideal Coordinates CCD File 
D [auth A] , E [auth A] , F [auth A] , G [auth A] , H [auth A] , I [auth A] , J [auth A] , K [auth A] , 
D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A], L [auth A], M [auth A], N [auth A]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
CL
Query on CL
Download Ideal Coordinates CCD File 
O [auth A], P [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.179 
  • Space Group: I 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 159.22α = 90
b = 159.22β = 90
c = 159.22γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-09-26
    Type: Initial release
  • Version 1.1: 2012-11-14
    Changes: Database references