Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 5.04 kDa 
• Atom Count: 355 
• Modelled Residue Count: 45 
• Deposited Residue Count: 45 
• Unique protein chains: 1

1ED7

SOLUTION STRUCTURE OF THE CHITIN-BINDING DOMAIN OF BACILLUS CIRCULANS WL-12 CHITINASE A1

• PDB DOI: 10.2210/pdb1ED7/pdb
• BMRB: 4588

• Classification: HYDROLASE
• Organism(s): Niallia circulans
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-01-27 Released: 2000-05-24 
• Deposition Author(s): Ikegami, T., Okada, T., Hashimoto, M., Seino, S., Watanabe, T., Shirakawa, M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 30 
• Selection Criteria: structures with the lowest energy 

Literature

Solution structure of the chitin-binding domain of Bacillus circulans WL-12 chitinase A1.

Ikegami, T., Okada, T., Hashimoto, M., Seino, S., Watanabe, T., Shirakawa, M.

(2000) J Biol Chem 275: 13654-13661

• PubMed: 10788483 
• DOI: 10.1074/jbc.275.18.13654
• Primary Citation of Related Structures:  
  1ED7


• PubMed Abstract: 
  

The three-dimensional structure of the chitin-binding domain (ChBD) of chitinase A1 (ChiA1) from a Gram-positive bacterium, Bacillus circulans WL-12, was determined by means of multidimensional heteronuclear NMR methods. ChiA1 is a glycosidase that hydrolyzes chitin and is composed of an N-terminal catalytic domain, two fibronectin type III-like domains, and C-terminal ChBD(ChiA1) (45 residues, Ala(655)-Gln(699)), which binds specifically to insoluble chitin. ChBD(ChiA1) has a compact and globular structure with the topology of a twisted beta-sandwich. This domain contains two antiparallel beta-sheets, one composed of three strands and the other of two strands. The core region formed by the hydrophobic and aromatic residues makes the overall structure rigid and compact. The overall topology of ChBD(ChiA1) is similar to that of the cellulose-binding domain (CBD) of Erwinia chrysanthemi endoglucanase Z (CBD(EGZ)). However, ChBD(ChiA1) lacks the three aromatic residues aligned linearly and exposed to the solvent, which probably interact with cellulose in CBDs. Therefore, the binding mechanism of a group of ChBDs including ChBD(ChiA1) may be different from that proposed for CBDs.

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Organizational Affiliation: 

Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0101, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHITINASE A1	A	45	Niallia circulans	Mutation(s): 0  Gene Names: chiA1 EC: 3.2.1.14
UniProt
Find proteins for P20533 (Niallia circulans) Explore P20533  Go to UniProtKB:  P20533

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 30 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1ED7 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-01-27 
• Released Date: 2000-05-24 
Deposition Author(s): Ikegami, T., Okada, T., Hashimoto, M., Seino, S., Watanabe, T., Shirakawa, M.

Revision History  

• Version 1.0: 2000-05-24
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-02-16
  Changes: Data collection, Database references, Derived calculations