4QWP

co-crystal structure of chitosanase OU01 with substrate

• PDB DOI: https://doi.org/10.2210/pdb4QWP/pdb

• Classification: HYDROLASE
• Organism(s): Pseudomonas sp. A-01
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2014-07-17 Released: 2015-07-22 
• Deposition Author(s): Lyu, Q., Liu, W., Han, B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.204 
• R-Value Work: 0.166 
• R-Value Observed: 0.168 

Literature

Structural and biochemical insights into the degradation mechanism of chitosan by chitosanase OU01.

Lyu, Q., Shi, Y., Wang, S., Yang, Y., Han, B., Liu, W., Jones, D.N., Liu, W.

(2015) Biochim Biophys Acta 1850: 1953-1961

• PubMed: 26145578 
• DOI: https://doi.org/10.1016/j.bbagen.2015.06.011
• Primary Citation of Related Structures:  
  4QWP


• PubMed Abstract: 
  

  A detailed knowledge about the degradation mechanism of chitosanase hydrolysis is critical for the design of novel enzymes to produce well-defined chito-oligosaccharide products.

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Organizational Affiliation: 

College of Marine Life Sciences, Ocean University of China, Qingdao, China.

Biological Assembly 1  

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

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

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 55.12 kDa 
• Atom Count: 4,182 
• Modelled Residue Count: 474 
• Deposited Residue Count: 496 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chitosanase	A, B	248	Pseudomonas sp. A-01	Mutation(s): 0  Gene Names: chitosanase OU01 EC: 3.2.1.132
UniProt
Find proteins for Q8KZM5 (Pseudomonas sp. A-01) Explore Q8KZM5  Go to UniProtKB:  Q8KZM5

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-amino-2-deoxy-beta-D-glucopyranose-(1-4)-2-amino-2-deoxy-beta-D-glucopyranose	C	2		N/A
Glycosylation Resources
GlyTouCan:  G61071JD GlyCosmos:  G61071JD GlyGen:  G61071JD

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-amino-2-deoxy-beta-D-glucopyranose-(1-4)-2-amino-2-deoxy-beta-D-glucopyranose-(1-4)-2-amino-2-deoxy-beta-D-glucopyranose	D, E, F	3		N/A
Glycosylation Resources
GlyTouCan:  G36121RO GlyCosmos:  G36121RO

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	H [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
ACT	G [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.204 
• R-Value Work: 0.166 
• R-Value Observed: 0.168 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 62.235	α = 90
b = 40.885	β = 106.83
c = 105.313	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-07-22 
Deposition Author(s): Lyu, Q., Liu, W., Han, B.

Revision History  

• Version 1.0: 2015-07-22
  Type: Initial release
  
• Version 1.1: 2015-07-29
  Changes: Database references
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary
• Version 2.1: 2023-09-20
  Changes: Data collection, Database references, Refinement description, Structure summary