2A3E

Crystal structure of Aspergillus fumigatus chitinase B1 in complex with allosamidin

• PDB DOI: https://doi.org/10.2210/pdb2A3E/pdb

• Classification: HYDROLASE
• Organism(s): Aspergillus fumigatus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2005-06-24 Released: 2005-09-27 
• Deposition Author(s): Rao, F.V., Andersen, O.A., Vora, K.A., DeMartino, J.A., van Aalten, D.M.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.219 
• R-Value Work: 0.191 
• R-Value Observed: 0.191 

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 96.89 kDa 
• Atom Count: 7,149 
• Modelled Residue Count: 789 
• Deposited Residue Count: 866 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
chitinase	A, B	433	Aspergillus fumigatus	Mutation(s): 0  EC: 3.2.1.14
UniProt
Find proteins for Q873X9 (Aspergillus fumigatus) Explore Q873X9  Go to UniProtKB:  Q873X9

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-allopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-allopyranose	C, D	2		N/A
Glycosylation Resources
GlyTouCan:  G77950XB GlyCosmos:  G77950XB

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AMI	G [auth A], I [auth B]	ALLOSAMIZOLINE C9 H16 N2 O4 MKJAYSJDHSEFRI-PVFLNQBWSA-N
SO4	E [auth A], F [auth A], H [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.219 
• R-Value Work: 0.191 
• R-Value Observed: 0.191 
• Space Group: P 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 117.889	α = 90
b = 117.889	β = 90
c = 99.519	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-09-27 
Deposition Author(s): Rao, F.V., Andersen, O.A., Vora, K.A., DeMartino, J.A., van Aalten, D.M.F.

Revision History  

• Version 1.0: 2005-09-27
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
• Version 2.1: 2023-10-25
  Changes: Advisory, Data collection, Database references, Refinement description, Structure summary