Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 31.75 kDa 
• Atom Count: 2353 
• Residue Count: 284 
• Unique protein chains: 1

2UY4

ScCTS1_acetazolamide crystal structure

• DOI: 10.2210/pdb2UY4/pdb

• Classification: HYDROLASE
• Organism(s): Saccharomyces cerevisiae
• Expression System: Komagataella pastoris
• Mutation(s): No 


• Deposited: 2007-04-02 Released: 2007-04-24 
• Deposition Author(s): Hurtado-Guerrero, R., van Aalten, D.M.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.232 
• R-Value Work: 0.184 
• R-Value Observed: 0.185 

Literature

Structure of Saccharomyces Cerevisiae Chitinase 1 and Screening-Based Discovery of Potent Inhibitors.

Hurtado-Guerrero, R., Van Aalten, D.M.F.

(2007) Chem Biol 14: 589

• PubMed: 17524989 
• DOI: 10.1016/j.chembiol.2007.03.015
• Primary Citation of Related Structures:  
  2UY2, 2UY3, 2UY4, 2UY5


• PubMed Abstract: 
  

Chitinases hydrolyse the beta(1,4)-glycosidic bonds of chitin, an essential fungal cell wall component. Genetic data on a subclass of fungal family 18 chitinases have suggested a role in cell wall morphology. Specific inhibitors of these enzymes would be useful as tools to study their role in cell wall morphogenesis and could possess antifungal properties. Here, we describe the crystallographic structure of a fungal "plant-type" family 18 chitinase, that of Saccharomyces cerevisiae CTS1. The enzyme is active against 4-methylumbelliferyl chitooligosaccharides and displays an unusually low pH optimum for activity. A library screen against ScCTS1 yielded hits with Ki 's as low as 3.2 microM. Crystal structures of ScCTS1 in complex with inhibitors from three series reveal striking mimicry of carbohydrate substrate by small aromatic moieties and a pocket that could be further exploited in optimization of these inhibitors.

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Organizational Affiliation: 

Division of Biological Chemistry & Molecular Microbiology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ENDOCHITINASE	A	294	Saccharomyces cerevisiae	Mutation(s): 0  EC: 3.2.1.14
Find proteins for P29029 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P29029  Go to UniProtKB:  P29029

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AZM	A	5-ACETAMIDO-1,3,4-THIADIAZOLE-2-SULFONAMIDE C4 H6 N4 O3 S2 BZKPWHYZMXOIDC-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
AZM	Ki:  21000   nM  Binding MOAD
AZM	Ki:  21000   nM  BindingDB
AZM	Ki :  21000   nM  PDBBind

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.232 
• R-Value Work: 0.184 
• R-Value Observed: 0.185 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.449	α = 90
b = 113.516	β = 90
c = 37.493	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-04-02 
• Released Date: 2007-04-24 
Deposition Author(s): Hurtado-Guerrero, R., van Aalten, D.M.F.

Revision History 

• Version 1.0: 2007-04-24
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance