5HWA

Crystal Structure of MH-K1 chitosanase in substrate-bound form

• PDB DOI:  https://doi.org/10.2210/pdb5HWA/pdb

• Classification: HYDROLASE
• Organism(s): Niallia circulans
• Expression System: Brevibacillus choshinensis
• Mutation(s): Yes 


• Deposited: 2016-01-29 Released: 2017-02-08 
• Deposition Author(s): Suzuki, M., Saito, A., Ando, A., Miki, K., Saito, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 0.170 
• R-Value Work: 0.137 
• R-Value Observed: 0.138 

Literature

Understanding for the catalytic mechanism based on the substrate-bound structure of GH-46 chitosanase from Bacillus circulans MH-K1

Suzuki, M., Saito, A., Kobayashi, M., Yokoyama, T., Omiya, S., Li, J., Sugita, K., Ando, A., Miki, K., Saito, J.

To be published.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 30.42 kDa 
• Atom Count: 2,681 
• Modelled Residue Count: 259 
• Deposited Residue Count: 259 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chitosanase	A	259	Niallia circulans	Mutation(s): 1  Gene Names: csn EC: 3.2.1.132
UniProt
Find proteins for P33673 (Niallia circulans) Explore P33673  Go to UniProtKB:  P33673

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
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-(1-4)-2-amino-2-deoxy-beta-D-glucopyranose	B	4		N/A
Glycosylation Resources
GlyTouCan:  G94774FX GlyCosmos:  G94774FX

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CAC	C [auth A]	CACODYLATE ION C2 H6 As O2 OGGXGZAMXPVRFZ-UHFFFAOYSA-M
ZN	G [auth A], H [auth A], I [auth A], J [auth A], K [auth A], L [auth A], M [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
ACY	D [auth A], E [auth A], F [auth A]	ACETIC ACID C2 H4 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 0.170 
• R-Value Work: 0.137 
• R-Value Observed: 0.138 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 40.75	α = 90
b = 79.03	β = 90
c = 94.76	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data collection
SCALA	data scaling
MOLREP	phasing
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2017-02-08 
Deposition Author(s): Suzuki, M., Saito, A., Ando, A., Miki, K., Saito, J.

Revision History  

• Version 1.0: 2017-02-08
  Type: Initial release
  
• Version 1.1: 2020-02-19
  Changes: Data collection
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary