Gene coding for cyclodextrin glucanotransferase chiefly...

Details Gene coding for cyclodextrin glucanotransferase chiefly... Gene coding for cyclodextrin glucanotransferase chiefly...

2005-11-01

2005-11-01

Rao, Manjunath N. (Department: 1652)

Chemistry: molecular biology and microbiology

Enzyme , proenzyme; compositions thereof; process for...

Hydrolase

C435S004000, C435S006120, C435S069100, C435S183000, C435S200000, C435S252300, C435S320100, C530S350000, C536S023200, C536S023500, C536S023700

Reexamination Certificate

active

06960461

ABSTRACT:
The invention provides a gene (isolated nucleic acid molecule) encoding the cyclodextrin glucanotransferase which produces a considerable amount of γ-cyclodextrin (γ-CD) from the substrates selected from among starch and starch decomposition products such as dextrin, amylopectin and amylose; recombinant plasmids comprising this gene; transformants transformed with the recombinant plasmid; methods of manufacturing the cyclodextrin glucanotransferase by employing these transformants to act upon the substrates selected from among starch and decomposition products thereof and causing the production of γ-CD as a main product; and methods of manufacturing γ-CD and CD-comprising compositions having a desired CD balance (α-, β- and γ-CD balance) employing this recombinant cyclodextrin glucanotransferase.

REFERENCES:
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Parsiegla et al., “Substrate binding to a cyclodextrin glycosyltransferase and mutations increasing the Γ-cyclodextrin production”, XP-002223754, European Journal of Biochemistry,vol. 255. No. 3, (Aug. 1998), pp. 710-717.
Nitschke et al., “Molecular cloning, nucleotide, sequence and expression in Escherichia coli of the β-cyclodextrin glycosyltransferase gene from Bacillus circulans strain No. 8”, XP-000676776, Applied Microbiology and Biotechnology, Springer Verlag, Berlin, DE,vol. 33, No. 5, (Aug. 1990), pp. 542-546.
Kato et al., “Cloning and Expression of the Bacillus subtilis No. 313 Γ-Cyclodextrin Forming CGTase Gene in Escherichia coli”, XP-009002198, Agricultural and Biological Chemistry,vol. 50, No. 8, (1986), pp. 2161-2162.
Fujiwara et al., “Cyclization Characteristics of Cyclodextrin Glucanotransferase Are Conferred by the NH2-Terminal Region of the Enzyme”, XP-000676761, Applied and Environmental Microbiology, Washington, DC, US,vol. 58, No. 12 (Dec. 1992) pp. 4016-4025.
Sin et al., “Replacement of an amino acid residue of cyclodextrin glucanotranferase of Bacillus ohbensis doubles the production of Γ-cyclodextrin”, XP-002034110, Journal of Biotechnology, Elsevier Science Publishers,vol. 32, No. 3, (Feb. 1994), pp. 283-288.

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