3GBD

Crystal structure of the isomaltulose synthase SmuA from Protaminobacter rubrum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural determinants of product specificity of sucrose isomerases

Ravaud, S.Robert, X.Watzlawick, H.Haser, R.Mattes, R.Aghajari, N.

(2009) FEBS Lett 583: 1964-1968

  • DOI: 10.1016/j.febslet.2009.05.002
  • Primary Citation of Related Structures:  
    3GBD, 3GBE

  • PubMed Abstract: 
  • The healthy sweetener isomaltulose is industrially produced from the conversion of sucrose by the sucrose isomerase SmuA from Protaminobacter rubrum. Crystal structures of SmuA in native and deoxynojirimycin complexed forms completed with modeling studies unravel the characteristics of the isomaltulose synthases catalytic pocket and their substrate binding mode ...

    The healthy sweetener isomaltulose is industrially produced from the conversion of sucrose by the sucrose isomerase SmuA from Protaminobacter rubrum. Crystal structures of SmuA in native and deoxynojirimycin complexed forms completed with modeling studies unravel the characteristics of the isomaltulose synthases catalytic pocket and their substrate binding mode. Comparison with the trehalulose synthase MutB highlights the role of Arg(298) and Arg(306) active site residues and surface charges in controlling product specificity of sucrose isomerases (isomaltulose versus trehalulose). The results provide a rationale for the specific design of optimized enzymes.


    Organizational Affiliation

    Institut de Biologie et Chimie des Protéines, UMR 5086-CNRS/Université de Lyon, IFR128 BioSciences Gerland-Lyon Sud, Lyon, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Sucrose isomerase SmuA from Protaminobacter rubrumA558Serratia plymuthicaMutation(s): 0 
Gene Names: smuA
EC: 5.4.99.11
UniProt
Find proteins for D0VX20 (Serratia plymuthica)
Explore D0VX20 
Go to UniProtKB:  D0VX20
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.179 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.63α = 90
b = 81.39β = 90
c = 135.57γ = 90
Software Package:
Software NamePurpose
DNAdata collection
AMoREphasing
CNSrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-05-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance