1DXJ

Structure of the chitinase from jack bean


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Jack Bean Chitinase

Hahn, M.Hennig, M.Schlesier, B.Hohne, W.

(2000) Acta Crystallogr.,Sect.D 56: 1096


  • PubMed Abstract: 
  • The structure of jack bean chitinase was solved at 1.8 A resolution by molecular replacement. It is an alpha-helical protein with three disulfide bridges. The active site is related in structure to animal and viral lysozymes. However, unlike in lysoz ...

    The structure of jack bean chitinase was solved at 1.8 A resolution by molecular replacement. It is an alpha-helical protein with three disulfide bridges. The active site is related in structure to animal and viral lysozymes. However, unlike in lysozyme, the architecture of the active site suggests a single-step cleavage. According to this mechanism, Glu68 is the proton donor and Glu90 assists in the reaction by moving towards the substrate and recruiting a water molecule that acts as the nucleophile. In this model, a water molecule was found in contact with Glu90 O(epsilon1) and Thr119 O(gamma) at a distance of 3.0 and 2.8 A, respectively. The model is in accordance with the observed inversion mechanism.


    Related Citations: 
    • Refined Structure of the Chitinase from Barley Seeds at 2.0 A Resolution
      Song, S.
      (1996) Acta Crystallogr.,Sect.D 52: 289
    • Crystal Structure of an Endochitinase from Hordeum Vulgare L. Seeds
      Hartmonzingoready, E.J.
      (1993) J.Mol.Biol. 229: 189


    Organizational Affiliation

    Institut für Biochemie, Charité, Humboldt-Universität, Monbijoustrasse 2, 10117 Berlin, Germany. michael.hahn@charite.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CLASS II CHITINASE
A
242Canavalia ensiformisN/A
Find proteins for O81934 (Canavalia ensiformis)
Go to UniProtKB:  O81934
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.182 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 67.690α = 90.00
b = 67.690β = 90.00
c = 110.210γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-08-29
    Type: Initial release
  • Version 1.1: 2011-05-07
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance