1CBG

THE CRYSTAL STRUCTURE OF A CYANOGENIC BETA-GLUCOSIDASE FROM WHITE CLOVER (TRIFOLIUM REPENS L.), A FAMILY 1 GLYCOSYL-HYDROLASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

The crystal structure of a cyanogenic beta-glucosidase from white clover, a family 1 glycosyl hydrolase.

Barrett, T.Suresh, C.G.Tolley, S.P.Dodson, E.J.Hughes, M.A.

(1995) Structure 3: 951-960

  • DOI: 10.1016/s0969-2126(01)00229-5
  • Primary Citation of Related Structures:  
    1CBG

  • PubMed Abstract: 
  • beta-glucosidases occur in a variety of organisms and catalyze the hydrolysis of aryl and alkyl-beta-D-glucosides as well as glucosides with only a carbohydrate moiety (such as cellobiose). The cyanogenic beta-glucosidase from white clover (subsequen ...

    beta-glucosidases occur in a variety of organisms and catalyze the hydrolysis of aryl and alkyl-beta-D-glucosides as well as glucosides with only a carbohydrate moiety (such as cellobiose). The cyanogenic beta-glucosidase from white clover (subsequently referred to as CBG) is responsible for the cleavage of cyanoglucosides. Both CBG and the cyanoglucosides occur within the plant cell wall where they are found in separate compartments and only come into contact when the leaf tissue experiences mechanical damage. This results in the eventual production of hydrogen cyanide which acts as a deterrent to grazing animals. beta-glucosidases have been assigned to particular glycosyl hydrolase families on the basis of sequence similarity; this classification has placed CBG in family 1 (there are a total of over 40 families) for which a three-dimensional structure has so far not been determined. This is the first report of the three-dimensional structure of a glycosyl hydrolase from family 1.


    Related Citations: 
    • Crystallization and Preliminary Crystallographic Analysis of the Cyanogenic Beta-Glucosidase from the White Clover Trifolium Repens L
      Tolley, S.P., Barrett, T.E., Suresh, C.G., Hughes, M.A.
      (1993) J Mol Biol 229: 791

    Organizational Affiliation

    Division of Protein Structure, National Institute for Medical Research, Mill Hill, London, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYANOGENIC BETA-GLUCOSIDASEA490Trifolium repensMutation(s): 0 
Gene Names: LI
EC: 3.2.1.21
Find proteins for P26205 (Trifolium repens)
Explore P26205 
Go to UniProtKB:  P26205
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.326α = 90
b = 70.326β = 90
c = 249.096γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
ARP/wARPmodel building
X-PLORmodel building
PROLSQrefinement
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2019-07-17
    Changes: Advisory, Data collection, Refinement description
  • Version 1.4: 2019-08-14
    Changes: Data collection, Refinement description