9U7Q | pdb_00009u7q

Chitinase ChiA mutant - C61A/C79A

• PDB DOI: https://doi.org/10.2210/pdb9U7Q/pdb

• Classification: HYDROLASE
• Organism(s): Vibrio parahaemolyticus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2025-03-25 Released: 2025-07-30 
• Deposition Author(s): Qipeng, C., Jinghan, Z.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 
  0.200 (Depositor), 0.206 (DCC) 
• R-Value Work: 
  0.173 (Depositor), 0.185 (DCC) 

Starting Model: in silico

Literature

Chitinase ChiA mutant - C61A/C79A

Qipeng, C., Jinghan, Z.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 46.42 kDa 
• Atom Count: 3,434 
• Modeled Residue Count: 410 
• Deposited Residue Count: 411 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
chitinase	A	411	Vibrio parahaemolyticus	Mutation(s): 2  Gene Names: HKB16_33210 EC: 3.2.1.14
UniProt
Find proteins for A0A7Y0XG39 (Vibrio parahaemolyticus) Explore A0A7Y0XG39  Go to UniProtKB:  A0A7Y0XG39

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
B3P (Subject of Investigation/LOI)	C [auth A]	2-[3-(2-HYDROXY-1,1-DIHYDROXYMETHYL-ETHYLAMINO)-PROPYLAMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C11 H26 N2 O6 HHKZCCWKTZRCCL-UHFFFAOYSA-N
EDO	B [auth A], D [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free:  0.200 (Depositor), 0.206 (DCC) 
• R-Value Work:  0.173 (Depositor), 0.185 (DCC) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 89.258	α = 90
b = 50.157	β = 95.027
c = 90.997	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
Aimless	data scaling
XDS	data reduction
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-30 
Deposition Author(s): Qipeng, C., Jinghan, Z.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32202987

Revision History  

• Version 1.0: 2025-07-30
  Type: Initial release