Crystal structure of ChbG

Experimental Data Snapshot

  • Resolution: 1.83 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.220 

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Crystal structure of ChbG from Klebsiella pneumoniae reveals the molecular basis of diacetylchitobiose deacetylation.

Lee, S.Y.Pardhe, B.D.Oh, T.J.Park, H.H.

(2022) Commun Biol 5: 862-862

  • DOI: https://doi.org/10.1038/s42003-022-03824-9
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The chitobiose (chb) operon is involved in the synthesis of chitooligosaccharide and is comprised of a BCARFG gene cluster. ChbG encodes a chitooligosaccharide deacetylase (CDA) which catalyzes the removal of one acetyl group from N,N'-diacetylchitobiose. It is considered a novel type of CDA due to its lack of sequence homology. Although there are various structural studies of CDAs linked to the kinetic properties of the enzyme, the structural information of ChbG is unavailable. In this study, the crystal structure of ChbG from Klebsiella pneumoniae is provided. The molecular basis of deacetylation of diacetylchitobiose by ChbG is determined based on structural analysis, mutagenesis, biophysical analysis, and in silico docking of the substrate, diacetylchitobiose. This study contributes towards a deeper understanding of chitin and chitosan biology, as well as provides a platform to engineer CDA biocatalysts.

  • Organizational Affiliation

    College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Chitooligosaccharide deacetylase
A, B
254Klebsiella pneumoniae subsp. pneumoniae MGH 78578Mutation(s): 0 
Gene Names: chbGKPN78578_12070KPN_01235
Find proteins for A6T7U7 (Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578))
Explore A6T7U7 
Go to UniProtKB:  A6T7U7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA6T7U7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.83 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.23α = 90
b = 67.03β = 90
c = 146.4γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Research Foundation (NRF, Korea)Korea, Republic Of--

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-07
    Type: Initial release
  • Version 1.1: 2023-11-29
    Changes: Data collection, Refinement description