1HKK

High resoultion crystal structure of human chitinase in complex with allosamidin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structures of Allosamidin Derivatives in Complex with Human Macrophage Chitinase.

Rao, F.V.Houston, D.R.Boot, R.G.Aerts, J.M.F.G.Sakuda, S.Van Aalten, D.M.F.

(2003) J.Biol.Chem. 278: 20110

  • DOI: 10.1074/jbc.M300362200
  • Primary Citation of Related Structures:  1HKI, 1HKJ, 1HKM

  • PubMed Abstract: 
  • The pseudotrisaccharide allosamidin is a potent family 18 chitinase inhibitor with demonstrated biological activity against insects, fungi, and the Plasmodium falciparum life cycle. The synthesis and biological properties of several derivatives have ...

    The pseudotrisaccharide allosamidin is a potent family 18 chitinase inhibitor with demonstrated biological activity against insects, fungi, and the Plasmodium falciparum life cycle. The synthesis and biological properties of several derivatives have been reported. The structural interactions of allosamidin with several family 18 chitinases have been determined by x-ray crystallography previously. Here, a high resolution structure of chitotriosidase, the human macrophage chitinase, in complex with allosamidin is presented. In addition, complexes of the allosamidin derivatives demethylallosamidin, methylallosamidin, and glucoallosamidin B are described, together with their inhibitory properties. Similar to other chitinases, inhibition of the human chitinase by allosamidin derivatives lacking a methyl group is 10-fold stronger, and smaller effects are observed for the methyl and C3 epimer derivatives. The structures explain the effects on inhibition in terms of altered hydrogen bonding and hydrophobic interactions, together with displaced water molecules. The data reported here represent a first step toward structure-based design of specific allosamidin derivatives.


    Organizational Affiliation

    Division of Biological Chemistry and Molecular Microbiology, School of Life Sciences, University of Dundee, Scotland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHITOTRIOSIDASE-1
A
364Homo sapiensGene Names: CHIT1
EC: 3.2.1.14
Find proteins for Q13231 (Homo sapiens)
Go to Gene View: CHIT1
Go to UniProtKB:  Q13231
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
NAA
Query on NAA

Download SDF File 
Download CCD File 
A
N-ACETYL-D-ALLOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-UIAUGNHASA-N
 Ligand Interaction
AMI
Query on AMI

Download SDF File 
Download CCD File 
A
ALLOSAMIZOLINE
C9 H16 N2 O4
MKJAYSJDHSEFRI-PVFLNQBWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.179 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 94.858α = 90.00
b = 94.858β = 90.00
c = 83.483γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-03-11
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance