The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2011
Filed:
Mar. 28, 2007
Cornelius Bessler, Dusseldorf, DE;
Susanne Wieland, Dormagen-Zons, DE;
Karl-heinz Maurer, Erkrath, DE;
Cornelius Bessler, Dusseldorf, DE;
Susanne Wieland, Dormagen-Zons, DE;
Karl-Heinz Maurer, Erkrath, DE;
Henkel AG & Co. KGaA, Duesseldorf, DE;
Abstract
The present invention relates to α-amylase variants that are stabilized to solvent-exerted hydrolysis, in particular at elevated temperatures or high pH, by point mutagenesis of asparagine (N) or glutamine (Q) residues located on the surface of the molecule to give other amino acid residues. The invention further relates to methods of increasing the stability of an α-amylase to solvent-exerted hydrolysis, in particular at elevated temperatures or high pH, whereby at least one asparagine (N) or glutamine (Q) residue on the surface of the molecule is replaced with a different amino acid residue. The α-amylase variants obtained thereby exhibit better stability to influences of the solvent, increased processivity, and are suited for numerous industrial areas of use, in particular as active ingredients in detergents and cleansers.