1V0E

Endosialidase of Bacteriophage K1F


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of the Polysialic Acid-Degrading Endosialidase of Bacteriophage K1F

Stummeyer, K.Dickmanns, A.Muehlenhoff, M.Gerardy-Schahn, R.Ficner, R.

(2005) Nat.Struct.Mol.Biol. 12: 90

  • DOI: 10.1038/nsmb874
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Phages infecting the polysialic acid (polySia)-encapsulated human pathogen Escherichia coli K1 are equipped with capsule-degrading tailspikes known as endosialidases, which are the only identified enzymes that specifically degrade polySia. As polySia ...

    Phages infecting the polysialic acid (polySia)-encapsulated human pathogen Escherichia coli K1 are equipped with capsule-degrading tailspikes known as endosialidases, which are the only identified enzymes that specifically degrade polySia. As polySia also promotes cellular plasticity and tumor metastasis in vertebrates, endosialidases are widely applied in polySia-related neurosciences and cancer research. Here we report the crystal structures of endosialidase NF and its complex with oligomeric sialic acid. The structure NF, which reveals three distinct domains, indicates that the unique polySia specificity evolved from a combination of structural elements characteristic of exosialidases and bacteriophage tailspike proteins. The endosialidase assembles into a catalytic trimer stabilized by a triple beta-helix. Its active site differs markedly from that of exosialidases, indicating an endosialidase-specific substrate-binding mode and catalytic mechanism. Residues essential for endosialidase activity were identified by structure-based mutational analysis.


    Related Citations: 
    • Proteolytic Processing and Oligomerization of Bacteriophage-Derived Endosialidases
      Muhlenhoff, M.,Stummeyer, K.,Grove, M.,Sauerborn, M.,Gerardy-Schahn, R.
      (2003) J.Biol.Chem. 278: 12634


    Organizational Affiliation

    Abteilung Zelluläre Chemie, Zentrum Biochemie, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENDO-ALPHA-SIALIDASE
A, B, C, D, E, F
666Enterobacteria phage K1FMutation(s): 0 
Find proteins for Q04830 (Enterobacteria phage K1F)
Go to UniProtKB:  Q04830
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
B, C, D, F
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.166 
  • Space Group: P 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 99.650α = 90.00
b = 131.250β = 90.00
c = 346.700γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-13
    Type: Initial release
  • Version 1.1: 2011-06-02
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance