1LLO

HEVAMINE A (A PLANT ENDOCHITINASE/LYSOZYME) COMPLEXED WITH ALLOSAMIDIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.200 
  • R-Value Observed: 0.146 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Stereochemistry of chitin hydrolysis by a plant chitinase/lysozyme and X-ray structure of a complex with allosamidin: evidence for substrate assisted catalysis.

Terwisscha van Scheltinga, A.C.Armand, S.Kalk, K.H.Isogai, A.Henrissat, B.Dijkstra, B.W.

(1995) Biochemistry 34: 15619-15623

  • DOI: 10.1021/bi00048a003
  • Primary Citation of Related Structures:  
    1LLO

  • PubMed Abstract: 
  • The plant enzyme hevamine has both chitinase and lysozyme activity. HPLC analysis of the products of the hydrolysis of chitopentaose shows that hevamine acts with retention of the configuration, despite the absence of a nucleophilic or stabilizing carboxylate ...

    The plant enzyme hevamine has both chitinase and lysozyme activity. HPLC analysis of the products of the hydrolysis of chitopentaose shows that hevamine acts with retention of the configuration, despite the absence of a nucleophilic or stabilizing carboxylate. To analyze the stabilization of a putative oxocarbonium ion intermediate, the X-ray structure of hevamine complexed with the inhibitor allosamidin was determined at 1.85 A resolution. This structure supports the role of Glu127 as a proton donor. The allosamizoline group binds in the center of the active site, mimicking a reaction intermediate in which a positive charge at C1 is stabilized intramolecularly by the carbonyl oxygen of the N-acetyl group at C2.


    Related Citations: 
    • Crystal Structures of Hevamine, a Plant Defence Protein with Chitinase and Lysozyme Activity, and its Complex with an Inhibitor
      Terwisscha Van Scheltinga, A.C., Kalk, K.H., Beintema, J.J., Dijkstra, B.W.
      (1994) Structure 2: 1181
    • Crystallization of Hevamine, an Enzyme with Lysozyme(Slash)Chitinase Activity from Hevea Brasiliensis Latex
      Rozeboom, H.J., Budiani, A., Beintema, J.J., Dijkstra, B.W.
      (1990) J Mol Biol 212: 441

    Organizational Affiliation

    BIOSON Research Institute, University of Groningen, The Netherlands.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HEVAMINEA273Hevea brasiliensisMutation(s): 0 
EC: 3.2.1.14 (PDB Primary Data), 3.2.1.17 (PDB Primary Data)
UniProt
Find proteins for P23472 (Hevea brasiliensis)
Explore P23472 
Go to UniProtKB:  P23472
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-allopyranoseB2N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G77950XB
GlyCosmos:  G77950XB
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMI (Subject of Investigation/LOI)
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: 1.85 Å
  • R-Value Free: 0.200 
  • R-Value Observed: 0.146 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.33α = 90
b = 57.99β = 90
c = 82.25γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
TNTrefinement

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary