1SLI

LEECH INTRAMOLECULAR TRANS-SIALIDASE COMPLEXED WITH DANA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.167 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of an intramolecular trans-sialidase with a NeuAc alpha2-->3Gal specificity.

Luo, Y.Li, S.C.Chou, M.Y.Li, Y.T.Luo, M.

(1998) Structure 6: 521-530

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Intramolecular trans-sialidase from leech (Macrobdella decora) is a unique enzyme which cleaves the terminal neuraminic acid (NeuAc) residue from sialoglycoconjugates, releasing 2, 7-anhydro-neuraminic acid (2,7-anhydro-NeuAc). It is the first enzyme ...

    Intramolecular trans-sialidase from leech (Macrobdella decora) is a unique enzyme which cleaves the terminal neuraminic acid (NeuAc) residue from sialoglycoconjugates, releasing 2, 7-anhydro-neuraminic acid (2,7-anhydro-NeuAc). It is the first enzyme found to exhibit strictly specific cleavage of NeuAc alpha2-->3Gal linkages in sialoglycoconjugates. The release of 2,7-anhydro-NeuAc instead of NeuAc implies a unique mechanism, in which the sialosyl linkage is transferred within the sialoglycoconjugate rather than hydrolyzed. The aims of the structural study were to gain structural insight into the strict specificity and unique mechanism of this unusual enzyme.


    Organizational Affiliation

    Center for Macromolecular Crystallography, University of Alabama at Birmingham, Alabama 35294, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INTRAMOLECULAR TRANS-SIALIDASE
A
679Macrobdella decoraMutation(s): 0 
EC: 4.2.2.15
Find proteins for Q27701 (Macrobdella decora)
Go to UniProtKB:  Q27701
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DAN
Query on DAN

Download SDF File 
Download CCD File 
A
2-DEOXY-2,3-DEHYDRO-N-ACETYL-NEURAMINIC ACID
C11 H17 N O8
JINJZWSZQKHCIP-UFGQHTETSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.167 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 46.443α = 113.14
b = 69.516β = 95.39
c = 72.514γ = 106.87
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-04-20
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance