5CGT

MALTOTRIOSE COMPLEX OF PRECONDITIONED CYCLODEXTRIN GLYCOSYLTRANSFERASE MUTANT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 

wwPDB Validation   3D Report Full Report



Literature

Substrate binding to a cyclodextrin glycosyltransferase and mutations increasing the gamma-cyclodextrin production.

Parsiegla, G.Schmidt, A.K.Schulz, G.E.

(1998) Eur J Biochem 255: 710-717

  • DOI: 10.1046/j.1432-1327.1998.2550710.x
  • Primary Citation of Related Structures:  
    4CGT, 5CGT, 6CGT, 7CGT, 8CGT, 9CGT

  • PubMed Abstract: 
  • Bacterial cyclodextrin glycosyltransferases use starch to produce cyclic maltooligosaccharides (cyclodextrins) which are of interest in various applications. The cyclization reaction gives rise to a spectrum of ring sizes consisting of predominantly ...

    Bacterial cyclodextrin glycosyltransferases use starch to produce cyclic maltooligosaccharides (cyclodextrins) which are of interest in various applications. The cyclization reaction gives rise to a spectrum of ring sizes consisting of predominantly six to eight glucosyl units. Using the enzyme from Bacillus circulans strain no. 8, binding studies have been performed with several substrates and analogues. The observed binding modes differ in detail, but agree in general with data on homologous enzymes. Based on these binding studies, two mutations were designed that changed the production spectrum from the predominant product beta-cyclodextrin of the wild-type enzyme towards gamma-cyclodextrin, which is of practical interest because it is rare and can encapsulate larger nonpolar compounds.


    Related Citations: 
    • Structure of Cyclodextrin Glycosyltransferase Complexed with a Derivative of its Main Product Beta-Cyclodextrin
      Schmidt, A.K., Cottaz, S., Driguez, H., Schulz, G.E.
      (1998) Biochemistry 37: 5909
    • Catalytic Center of Cyclodextrin Glycosyltransferase Derived from X-Ray Structure Analysis Combined with Site-Directed Mutagenesis
      Klein, C., Hollender, J., Bender, H., Schulz, G.E.
      (1992) Biochemistry 31: 8740
    • Structure of Cyclodextrin Glycosyltransferase Refined at 2.0 A Resolution
      Klein, C., Schulz, G.E.
      (1991) J Mol Biol 217: 737
    • Molecular Cloning, Nucleotide Sequence and Expression in Escherichia Coli of the Beta-Cyclodextrin Glycosyltransferase Gene from Bacillus Circulans Strain No. 8
      Nitschke, L., Heeger, K., Bender, H., Schulz, G.E.
      (1990) Appl Microbiol Biotechnol 33: 542

    Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Freiburg im Breisgau, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYCLODEXTRIN GLYCOSYLTRANSFERASEA684Bacillus circulansMutation(s): 1 
EC: 2.4.1.19
Find proteins for P30920 (Bacillus circulans)
Explore P30920 
Go to UniProtKB:  P30920
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-glucopyranose-(1-4)-beta-D-glucopyranose
B, C
2 N/A Oligosaccharides Interaction
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLC
Query on GLC

Download CCD File 
A
alpha-D-glucopyranose
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900018
Query on PRD_900018
B, Cbeta-maltoseOligosaccharide /  Nutrient

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.5α = 90
b = 104.9β = 90
c = 113.8γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
XSCALEdata scaling
X-PLORmodel building
X-PLORrefinement
XDSdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-08-12
    Type: Initial release
  • Version 1.1: 2008-03-25
    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