7CGT

RAMEB COMPLEX OF CYCLODEXTRIN GLYCOSYLTRANSFERASE MUTANT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • Primary Citation of Related Structures:  

  • 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
    • Structure of Cyclodextrin Glycosyltransferase Refined at 2.0 A Resolution
      Klein, C.,Schulz, G.E.
      (1991) J.Mol.Biol. 217: 737
    • 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
    • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYCLODEXTRIN GLYCOSYLTRANSFERASE
A
684Bacillus circulansMutation(s): 1 
EC: 2.4.1.19
Find proteins for P30920 (Bacillus circulans)
Go to UniProtKB:  P30920
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.165 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 95.000α = 90.00
b = 104.800β = 90.00
c = 113.600γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
XDSdata scaling
XSCALEdata scaling
XDSdata reduction
X-PLORphasing
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-08-12
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance