1FFQ

CRYSTAL STRUCTURE OF CHITINASE A COMPLEXED WITH ALLOSAMIDIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

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This is version 2.0 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: 
    • 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
    • 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

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CHITINASE AA540Serratia marcescensMutation(s): 0 
Gene Names: chiA
EC: 3.2.1.14
UniProt
Find proteins for P07254 (Serratia marcescens)
Explore P07254 
Go to UniProtKB:  P07254
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07254
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-allopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-allopyranoseB 2N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G77950XB
GlyCosmos:  G77950XB
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMI
Query on AMI

Download Ideal Coordinates CCD File 
C [auth A]ALLOSAMIZOLINE
C9 H16 N2 O4
MKJAYSJDHSEFRI-PVFLNQBWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 199.125α = 90
b = 131.816β = 90
c = 59.479γ = 90
Software Package:
Software NamePurpose
MAR345data collection
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-02-11
    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: 2017-10-04
    Changes: Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary