1D2K

C. IMMITIS CHITINASE 1 AT 2.2 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The X-ray structure of a chitinase from the pathogenic fungus Coccidioides immitis.

Hollis, T.Monzingo, A.F.Bortone, K.Ernst, S.Cox, R.Robertus, J.D.

(2000) Protein Sci 9: 544-551

  • DOI: 10.1110/ps.9.3.544
  • Primary Citation of Related Structures:  
    1D2K

  • PubMed Abstract: 
  • The X-ray structure of chitinase from the fungal pathogen Coccidioides immitis has been solved to 2.2 A resolution. Like other members of the class 18 hydrolase family, this 427 residue protein is an eight-stranded beta/alpha-barrel. Although lacking an N-terminal chitin anchoring domain, the enzyme closely resembles the chitinase from Serratia marcescens ...

    The X-ray structure of chitinase from the fungal pathogen Coccidioides immitis has been solved to 2.2 A resolution. Like other members of the class 18 hydrolase family, this 427 residue protein is an eight-stranded beta/alpha-barrel. Although lacking an N-terminal chitin anchoring domain, the enzyme closely resembles the chitinase from Serratia marcescens. Among the conserved features are three cis peptide bonds, all involving conserved active site residues. The active site is formed from conserved residues such as tryptophans 47, 131, 315, 378, tyrosines 239 and 293, and arginines 52 and 295. Glu171 is the catalytic acid in the hydrolytic mechanism; it was mutated to a Gln, and activity was abolished. Allosamidin is a substrate analog that strongly inhibits the class 18 enzymes. Its binding to the chitinase hevamine has been observed, and we used conserved structural features of the two enzymes to predict the inhibitors binding to the fungal enzyme.


    Related Citations: 
    • Crystallization and Preliminary X-ray Analysis of a Chitinase from the Fungal Pathogen Coccidioides immitis
      Hollis, T., Monzingo, A.F., Bortone, K., Schelp, E., Cox, R., Robertus, J.D.
      (1998) Acta Crystallogr D Biol Crystallogr 54: 1412

    Organizational Affiliation

    Institute of Cellular and Molecular Biology, Department of Chemistry and Biochemistry, University of Texas, Austin 78712, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CHITINASE 1A392Coccidioides immitisMutation(s): 0 
EC: 3.2.1.14
UniProt
Find proteins for P0CB51 (Coccidioides posadasii (strain RMSCC 757 / Silveira))
Explore P0CB51 
Go to UniProtKB:  P0CB51
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.178 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.248α = 90
b = 91.248β = 90
c = 95.4γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-09-27
    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: 2018-01-31
    Changes: Experimental preparation