6CGT

HOXA COMPLEX OF CYCLODEXTRIN GLYCOSYLTRANSFERASE MUTANT

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.167 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history. 


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, 9CGT, 8CGT, 7CGT, 5CGT, 6CGT

  • 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 six to eight glucosyl units ...

    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
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYCLODEXTRIN GLYCOSYLTRANSFERASE A684Bacillus 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
4-amino-4,6-dideoxy-beta-D-glucopyranose-(1-4)-alpha-D-glucopyranose
B, C
2 N/A Oligosaccharides Interaction
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OPG
Query on OPG
Download Ideal Coordinates CCD File 
A
OXIRANPSEUDOGLUCOSE
C7 H12 O5
BDIDRHMZXLEMIZ-CXNFULCWSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93α = 90
b = 104.9β = 90
c = 113.7γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
XSCALEdata scaling
X-PLORmodel building
X-PLORrefinement
XDSdata reduction
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-10-14
    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: Advisory, Atomic model, Data collection, Derived calculations, Structure summary