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.
Download Mendeley
