9XBH | pdb_00009xbh

Crystal structure of E19A mutant chitosanase from Bacillus subtilis MY002 complexed with GlcNs.

• PDB DOI: https://doi.org/10.2210/pdb9XBH/pdb

• Classification: HYDROLASE
• Organism(s): Bacillus subtilis subsp. subtilis str. 168
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2025-10-24 Released: 2026-10-28 
• Deposition Author(s): Xie, J., Liu, Z.C., Wang, G.G.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.192 (Depositor), 0.192 (DCC) 
• R-Value Work: 
  0.150 (Depositor), 0.149 (DCC) 
• R-Value Observed: 
  0.152 (Depositor) 

Starting Model: experimental

Literature

Crystal structure of E19A mutant chitosanase from Bacillus subtilis MY002 complexed with GlcNs.

Xie, J., Xie, T., Wang, G.G.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 28.75 kDa 
• Atom Count: 2,379 
• Modeled Residue Count: 241 
• Deposited Residue Count: 242 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chitosanase	A	242	Bacillus subtilis subsp. subtilis str. 168	Mutation(s): 1  Gene Names: csn, BSU26890 EC: 3.2.1.132
UniProt
Find proteins for O07921 (Bacillus subtilis (strain 168)) Explore O07921  Go to UniProtKB:  O07921

Oligosaccharides

Help  

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	D 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-(1-4)-(2~{R},3~{S},4~{R},5~{R},6~{R})-5-azanyl-6-(dioxidanyl)-2-(hydroxymethyl)oxane-3,4-diol	B	4	N/A	N/A

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.192 (Depositor), 0.192 (DCC) 
• R-Value Work:  0.150 (Depositor), 0.149 (DCC) 
• R-Value Observed: 0.152 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.671	α = 90
b = 77.047	β = 90
c = 79.278	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-3000	data scaling
HKL-3000	data reduction
PHASER	phasing
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-10-28 
Deposition Author(s): Xie, J., Liu, Z.C., Wang, G.G.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2026-10-28
  Type: Initial release