1S0J

Trypanosoma cruzi trans-sialidase in complex with MuNANA (Michaelis complex)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.162 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Insights into the Catalytic Mechanism of Trypanosoma cruzi trans-Sialidase.

Amaya, M.F.Watts, A.G.Damager, I.Wehenkel, A.Nguyen, T.Buschiazzo, A.Paris, G.Frasch, A.C.Withers, S.G.Alzari, P.M.

(2004) Structure 12: 775-784

  • DOI: 10.1016/j.str.2004.02.036
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Sialidases are a superfamily of sialic-acid-releasing enzymes that are of significant interest due to their implication as virulence factors in the pathogenesis of a number of diseases. However, extensive studies of viral and microbial sialidases hav ...

    Sialidases are a superfamily of sialic-acid-releasing enzymes that are of significant interest due to their implication as virulence factors in the pathogenesis of a number of diseases. However, extensive studies of viral and microbial sialidases have failed to provide a comprehensive picture of their mechanistic properties, in part because the structures of competent enzyme-substrate complexes and reaction intermediates have never been described. Here we report these structures for the Trypanosoma cruzi trans-sialidase (TcTS), showing that catalysis by sialidases occurs via a similar mechanism to that of other retaining glycosidases, but with some intriguing differences that may have evolved in response to the substrate structure.


    Related Citations: 
    • The crystal structure and mode of action of trans-sialidase, a key enzyme in Trypanosoma cruzi pathogenesis
      Buschiazzo, A.,Amaya, M.F.,Cremona, M.L.,Frasch, A.C.,Alzari, P.M.
      (2002) Mol.Cell 10: 757


    Organizational Affiliation

    Unité de Biochimie Structurale, CNRS URA 2185, Institut Pasteur, 25 rue du Dr. Roux, 75724 Paris, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
trans-sialidase
A
648Trypanosoma cruziMutation(s): 8 
Find proteins for Q26966 (Trypanosoma cruzi)
Go to UniProtKB:  Q26966
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MUS
Query on MUS

Download SDF File 
Download CCD File 
A
4-METHYL-2-OXO-2H-CHROMEN-7-YL 5-(ACETYLAMINO)-3,5-DIDEOXY-L-ERYTHRO-NON-2-ULOPYRANOSIDONIC ACID
METHYLUMBELLIFERYL SIALIC ACID
C21 H25 N O11
KKDWIUJBUSOPGC-GKHMPSLRSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.162 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 54.373α = 90.00
b = 129.423β = 108.33
c = 54.234γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-05-18
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance