1RO7

Structural analysis of the sialyltransferase CstII from Campylobacter jejuni in complex with a substrate analogue, CMP-3FNeuAc.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural analysis of the sialyltransferase CstII from Campylobacter jejuni in complex with a substrate analog.

Chiu, C.P.Watts, A.G.Lairson, L.L.Gilbert, M.Lim, D.Wakarchuk, W.W.Withers, S.G.Strynadka, N.C.

(2004) Nat Struct Mol Biol 11: 163-170

  • DOI: 10.1038/nsmb720
  • Primary Citation of Related Structures:  
    1RO8, 1RO7

  • PubMed Abstract: 
  • Sialic acid terminates oligosaccharide chains on mammalian and microbial cell surfaces, playing critical roles in recognition and adherence. The enzymes that transfer the sialic acid moiety from cytidine-5'-monophospho-N-acetyl-neuraminic acid (CMP-NeuAc) to the terminal positions of these key glycoconjugates are known as sialyltransferases ...

    Sialic acid terminates oligosaccharide chains on mammalian and microbial cell surfaces, playing critical roles in recognition and adherence. The enzymes that transfer the sialic acid moiety from cytidine-5'-monophospho-N-acetyl-neuraminic acid (CMP-NeuAc) to the terminal positions of these key glycoconjugates are known as sialyltransferases. Despite their important biological roles, little is understood about the mechanism or molecular structure of these membrane-associated enzymes. We report the first structure of a sialyltransferase, that of CstII from Campylobacter jejuni, a highly prevalent foodborne pathogen. Our structural, mutagenesis and kinetic data provide support for a novel mode of substrate binding and glycosyl transfer mechanism, including essential roles of a histidine (general base) and two tyrosine residues (coordination of the phosphate leaving group). This work provides a framework for understanding the activity of several sialyltransferases, from bacterial to human, and for the structure-based design of specific inhibitors.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of British Columbia, 2146 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
alpha-2,3/8-sialyltransferase ABCD259Campylobacter jejuniMutation(s): 4 
Gene Names: cstcst-IIB7M65_00010BM513_01020GAU91_01005
EC: 2.4.99
Find proteins for Q9LAK3 (Campylobacter jejuni)
Explore Q9LAK3 
Go to UniProtKB:  Q9LAK3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CSF
Query on CSF

Download Ideal Coordinates CCD File 
C
CYTIDINE-5'-MONOPHOSPHATE-3-FLUORO-N-ACETYL-NEURAMINIC ACID
C20 H30 F N4 O16 P
HNJLGUNKGJTPBF-JTKQZVQZSA-N
 Ligand Interaction
MPD
Query on MPD

Download Ideal Coordinates CCD File 
B
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,B,C,DL-PEPTIDE LINKINGC5 H11 N O2 SeMET
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CSFKi :  657000   nM  PDBBind
CSFKi:  657000   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.66α = 90
b = 66.031β = 94.42
c = 99.172γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-02-03
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation