2JF7

Structure of Strictosidine Glucosidase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular Architecture of Strictosidine Glucosidase - the Gateway to the Biosynthesis of the Monoterpenoid Indole Alkaloid Family

Barleben, L.Panjikar, S.Ruppert, M.Koepke, J.Stockigt, J.

(2007) Plant Cell 19: 2886

  • DOI: 10.1105/tpc.106.045682
  • Primary Citation of Related Structures:  
    2JF7, 2JF6

  • PubMed Abstract: 
  • Strictosidine beta-D-glucosidase (SG) follows strictosidine synthase (STR1) in the production of the reactive intermediate required for the formation of the large family of monoterpenoid indole alkaloids in plants. This family is composed of approxim ...

    Strictosidine beta-D-glucosidase (SG) follows strictosidine synthase (STR1) in the production of the reactive intermediate required for the formation of the large family of monoterpenoid indole alkaloids in plants. This family is composed of approximately 2000 structurally diverse compounds. SG plays an important role in the plant cell by activating the glucoside strictosidine and allowing it to enter the multiple indole alkaloid pathways. Here, we report detailed three-dimensional information describing both native SG and the complex of its inactive mutant Glu207Gln with the substrate strictosidine, thus providing a structural characterization of substrate binding and identifying the amino acids that occupy the active site surface of the enzyme. Structural analysis and site-directed mutagenesis experiments demonstrate the essential role of Glu-207, Glu-416, His-161, and Trp-388 in catalysis. Comparison of the catalytic pocket of SG with that of other plant glucosidases demonstrates the structural importance of Trp-388. Compared with all other glucosidases of plant, bacterial, and archaeal origin, SG's residue Trp-388 is present in a unique structural conformation that is specific to the SG enzyme. In addition to STR1 and vinorine synthase, SG represents the third structural example of enzymes participating in the biosynthetic pathway of the Rauvolfia alkaloid ajmaline. The data presented here will contribute to deciphering the structure and reaction mechanism of other higher plant glucosidases.


    Organizational Affiliation

    Department of Pharmaceutical Biology, Institute of Pharmacy, Johanes Gutenberg-University, D-55099, Mainz, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
STRICTOSIDINE-O-BETA-D-GLUCOSIDASEAB532Rauvolfia serpentinaMutation(s): 0 
Gene Names: SGR1
EC: 3.2.1.105
Find proteins for Q8GU20 (Rauvolfia serpentina)
Explore Q8GU20 
Go to UniProtKB:  Q8GU20
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.186 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 157.63α = 90
b = 157.63β = 90
c = 103.59γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
EPMRphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-02-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2012-05-16
    Changes: Other