Alpha-amylase mutants

The invention relates to a novel Termamyl-like alpha-amylase, and Termamyl-like alpha-amylases comprising mutations in two, three, four, five or six regions/positions. The variants have increased thermostability at acidic pH and/or at low Ca2+ concentrations (relative to the parent). The invention a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SVENDSEN ALLAN, HEDEGAARD LISBETH, OUTTRUP HELLE, BORCHERT TORBEN VEDEL, NIELSEN BJARNE RONFELDT, NIELSEN VIBEKE SKOVGAARD, BISGARD-FRANTZEN HENRIK
Format:	Patent
Sprache:	eng
Schlagworte:	ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES BEER BIOCHEMISTRY CANDLES CHEMISTRY COMPOSITIONS THEREOF CULTURE MEDIA DETERGENT COMPOSITIONS DETERGENTS ENZYMES ENZYMOLOGY FATTY ACIDS THEREFROM FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE METALLURGY MICROBIOLOGY MICROORGANISMS OR ENZYMES MUTATION OR GENETIC ENGINEERING PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS RECOVERY OF GLYCEROL RESIN SOAPS SOAP OR SOAP-MAKING SPIRITS USE OF SINGLE SUBSTANCES AS DETERGENTS VINEGAR WINE
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Beschreibung
Zusammenfassung:	The invention relates to a novel Termamyl-like alpha-amylase, and Termamyl-like alpha-amylases comprising mutations in two, three, four, five or six regions/positions. The variants have increased thermostability at acidic pH and/or at low Ca2+ concentrations (relative to the parent). The invention also relates to a DNA construct comprising a DNA sequence encoding an alpha-amylase variant of the invention, a recombinant expression vector which carries a DNA construct of the invention, a cell which is transformed with a DNA construct of the invention, the use of an alpha-amylase variant of the invention for washing and/or dishwashing, textile desizing, starch liquefaction, a detergent additive comprising an alpha-amylase variant of the invention, a manual or automatic dishwashing detergent composition comprising an alpha-amylase variant of the invention, a method for generating a variant of a parent Termamyl-like alpha-amylase, which variant exhibits increased thermostability at acidic pH and/or at low Ca2+ concentrations (relative to the parent).