1E15

Chitinase B from Serratia Marcescens

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.183 

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This is version 1.2 of the entry. See complete history. 

Literature

Structure of a Two-Domain Chitotriosidase from Serratia Marcescens at 1.9 Angstrom Resoltuion

Van Aalten, D.M.F., Synstad, B., Brurberg, M.B., Hough, E., Riise, B.W., Eijsink, V.G.H., Wierenga, R.K.

(2000) Proc.Natl.Acad.Sci.USA 97: 5842

  • DOI: 10.1073/pnas.97.11.5842
  • Also Cited By: 1UR8, 1OGG, 1OGB, 1UR9, 1GOI

  • PubMed Abstract: 

    • In this paper, we describe the structure of chitinase B from Serratia marcescens, which consists of a catalytic domain with a TIM-barrel fold and a 49-residue C-terminal chitin-binding domain. This chitinase is the first structure of a bacterial exoc ...

    In this paper, we describe the structure of chitinase B from Serratia marcescens, which consists of a catalytic domain with a TIM-barrel fold and a 49-residue C-terminal chitin-binding domain. This chitinase is the first structure of a bacterial exochitinase, and it represents one of only a few examples of a glycosyl hydrolase structure having interacting catalytic and substrate-binding domains. The chitin-binding domain has exposed aromatic residues that contribute to a 55-A long continuous aromatic stretch extending into the active site. Binding of chitin oligomers is blocked beyond the -3 subsite, which explains why the enzyme has chitotriosidase activity and degrades the chitin chain from the nonreducing end. Comparison of the chitinase B structure with that of chitinase A explains why these enzymes act synergistically in the degradation of chitin.

    Organizational Affiliation: 

    Biocenter Oulu, Department of Biochemistry, University of Oulu, Linnanmaa, FIN-90570 Oulu, Finland. dava@davapc1.bioch.dundee.ac.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHITINASE B
A, B
499Serratia marcescensMutation(s): 0 
Gene Names: chiB
Find proteins for Q54276 (Serratia marcescens)
Go to UniProtKB:  Q54276
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.135α = 90.00
b = 106.586β = 90.00
c = 187.326γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
MLPHAREphasing
CNSrefinement
DENZOdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-08-18
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance