Macromolecule Content

• Total Structure Weight: 5.61 kDa 
• Atom Count: 394 
• Modelled Residue Count: 53 
• Deposited Residue Count: 53 
• Unique protein chains: 1

2D49

Solution structure of the Chitin-Binding Domain of Streptomyces griseus Chitinase C

• DOI: 10.2210/pdb2D49/pdb

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


• Deposited: 2005-10-11 Released: 2006-10-11 
• Deposition Author(s): Akagi, K., Watanabe, J., Hara, M., Kezuka, Y., Chikaishi, E., Yamaguchi, T., Akutsu, H., Nonaka, T., Watanabe, T., Ikegami, T.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 30 

Literature

Identification of the substrate interaction region of the chitin-binding domain of Streptomyces griseus chitinase C

Akagi, K., Watanabe, J., Hara, M., Kezuka, Y., Chikaishi, E., Yamaguchi, T., Akutsu, H., Nonaka, T., Watanabe, T., Ikegami, T.

(2006) J Biochem 139: 483-493

• PubMed: 16567413 
• DOI: 10.1093/jb/mvj062
• Primary Citation of Related Structures:  
  2D49


• PubMed Abstract: 
  

Chitinase C from Streptomyces griseus HUT6037 was discovered as the first bacterial chitinase in family 19 other than chitinases found in higher plants. Chitinase C comprises two domains: a chitin-binding domain (ChBD(ChiC)) for attachment to chitin and a chitin-catalytic domain for digesting chitin. The structure of ChBD(ChiC) was determined by means of 13C-, 15N-, and 1H-resonance nuclear magnetic resonance (NMR) spectroscopy. The conformation of its backbone comprised two beta-sheets composed of two and three antiparallel beta-strands, respectively, this being very similar to the backbone conformations of the cellulose-binding domain of endoglucanase Z from Erwinia chrysanthemi (CBD(EGZ)) and the chitin-binding domain of chitinase A1 from Bacillus circulans WL-12 (ChBD(ChiA1)). The interaction between ChBD(ChiC) and hexa-N-acetyl-chitohexaose was monitored through chemical shift perturbations, which showed that ChBD(ChiC) interacted with the substrate through two aromatic rings exposed to the solvent as CBD(EGZ) interacts with cellulose through three characteristic aromatic rings. Comparison of the conformations of ChBD(ChiA1), ChBD(ChiC), and other typical chitin- and cellulose-binding domains, which have three solvent-exposed aromatic residues responsible for binding to polysaccharides, has suggested that they have adopted versatile binding site conformations depending on the substrates, with almost the same backbone conformations being retained.

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Organizational Affiliation: 

Laboratory of Structural Proteomics, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
chitinase C	A	53	Streptomyces griseus	Mutation(s): 1  Gene Names: chiC, NCTC13033_02762 EC: 3.2.1.14
Find proteins for O50152 (Streptomyces griseus) Explore O50152  Go to UniProtKB:  O50152

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 30 
• OLDERADO: 2D49 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-10-11 
• Released Date: 2006-10-11 
Deposition Author(s): Akagi, K., Watanabe, J., Hara, M., Kezuka, Y., Chikaishi, E., Yamaguchi, T., Akutsu, H., Nonaka, T., Watanabe, T., Ikegami, T.

Revision History  

• Version 1.0: 2006-10-11
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance