1EDQ

CRYSTAL STRUCTURE OF CHITINASE A FROM S. MARCESCENS AT 1.55 ANGSTROMS

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 

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


Literature

De novo purification scheme and crystallization conditions yield high-resolution structures of chitinase A and its complex with the inhibitor allosamidin.

Papanikolau, Y., Tavlas, G., Vorgias, C.E., Petratos, K.

(2003) Acta Crystallogr D Biol Crystallogr 59: 400-403

  • DOI: 10.1107/s0907444902021923
  • Primary Citation of Related Structures:  
    1EDQ, 1FFQ

  • PubMed Abstract: 

    • The purification scheme of chitinase A (ChiA) from S. marcescens has been extensively revised. The pure enzyme crystallizes readily under new crystallization conditions. The ChiA crystal structure has been refined to 1.55 A resolution and the crystal structure of ChiA co-crystallized with the inhibitor allosamidin has been refined to 1 ...

    The purification scheme of chitinase A (ChiA) from S. marcescens has been extensively revised. The pure enzyme crystallizes readily under new crystallization conditions. The ChiA crystal structure has been refined to 1.55 A resolution and the crystal structure of ChiA co-crystallized with the inhibitor allosamidin has been refined to 1.9 A resolution. Allosamidin is located in the deep active-site tunnel of ChiA and interacts with three important residues: Glu315, the proton donor of the catalysis, Asp313, which adopts two conformations in the native structure but is oriented towards Glu315 in the inhibitor complex, and Tyr390, which lies opposite Glu315 in the active-site tunnel.

    Related Citations: 
    • Crystal structure of a bacterial chitinase at 2.3 Angstrom resolution
      Perrakis, A., Tews, I., Dauter, Z., Oppenheim, A.B., Chet, I., Wilson, K.S., Vorgias, C.E.
      (1994) Structure 2: 1169
    • HIGH RESOLUTION STRUCTURAL ANALYSES OF MUTANT CHITINASE A COMPLEXES WITH SUBSTRATES PROVIDE NEW INSIGHT INTO THE MECHANISM OF CATALYSIS
      PAPANIKOLAU, Y., PRAG, G., TAVLAS, G., VORGIAS, C.E., OPPENHEIM, A.B., PETRATOS, K.
      (2001) Biochemistry 40: 11338
    Organizational Affiliation: 

    Institute of Molecular Biology and Biotechnology (IMBB)-FORTH, PO Box 1527, 71110 Heraklion, Greece.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CHITINASE AA540Serratia marcescensMutation(s): 0 
Gene Names: chiA
EC: 3.2.1.14
Find proteins for O83008 (Serratia marcescens)
Explore O83008 
Go to UniProtKB:  O83008
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 199.497α = 90
b = 131.825β = 90
c = 59.368γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-02-18
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance