Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 41519.52 
• Atom Count: 2836 
• Residue Count: 366 
• Unique protein chains: 1

1GUV

Structure of human chitotriosidase

• DOI: 10.2210/pdb1GUV/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens


• Deposited: 2002-01-31 Released: 2003-03-30 
• Deposition Author(s): Von Moeller, H., Houston, D., Boot, R.G., Aerts, J.M.F.G., Van Aalten, D.M.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.35 Å
• R-Value Free: 0.262 
• R-Value Work: 0.216 

Literature

Structure of Human Chitotriosidase - Implications for Specific Inhibitor Design and Function of Mammalian Chitinase-Like Lectins

Fusetti, F., Von Moeller, H., Houston, D., Rozeboom, H.J., Dijkstra, B.W., Boot, R.G., Aerts, J.M.F.G., Van Aalten, D.M.F.

(2002) J.Biol.Chem. 277: 25537

• PubMed: 11960986 
• DOI: 10.1074/jbc.M201636200
• Primary Citation of Related Structures:  
  1LQ0, 1LG2, 1LG1


• PubMed Abstract: 
  

Chitin hydrolases have been identified in a variety of organisms ranging from bacteria to eukaryotes. They have been proposed to be possible targets for the design of novel chemotherapeutics against human pathogens such as fungi and protozoan parasites as mammals were not thought to possess chitin-processing enzymes. Recently, a human chitotriosidase was described as a marker for Gaucher disease with plasma levels of the enzyme elevated up to 2 orders of magnitude. The chitotriosidase was shown to be active against colloidal chitin and is inhibited by the family 18 chitinase inhibitor allosamidin. Here, the crystal structure of the human chitotriosidase and complexes with a chitooligosaccharide and allosamidin are described. The structures reveal an elongated active site cleft, compatible with the binding of long chitin polymers, and explain the inactivation of the enzyme through an inherited genetic deficiency. Comparison with YM1 and HCgp-39 shows how the chitinase has evolved into these mammalian lectins by the mutation of key residues in the active site, tuning the substrate binding specificity. The soaking experiments with allosamidin and chitooligosaccharides give insight into ligand binding properties and allow the evaluation of differential binding and design of species-selective chitinase inhibitors.

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Organizational Affiliation: 

Laboratory of Biophysical Chemistry, University of Groningen, The Netherlands.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CHITOTRIOSIDASE	A	366	Homo sapiens	Mutation(s): 0  Gene 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 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
EDO	A	1,2-ETHANEDIOL ETHYLENE GLYCOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.35 Å
• R-Value Free: 0.262 
• R-Value Work: 0.216 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 93.258	α = 90.00
b = 93.258	β = 90.00
c = 89.797	γ = 90.00

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement
DENZO	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-01-31 
• Released Date: 2003-03-30 
• Deposition Author(s): Von Moeller, H., Houston, D., Boot, R.G., Aerts, J.M.F.G., Van Aalten, D.M.F.

Revision History 

• Version 1.0: 2003-03-30
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance