Pullulanase, microorganisms which produce it, processes for the preparation of this pullulanese and the uses thereof
First Claim
1. An enzymatic composition comprising a pullulanase produced by Bacillus deramificans, or by a derivative or a mutant strain thereof that retains all identifying characteristics of said species.
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Abstract
The invention relates to a heat-stable pullulanase having the property of hydrolysing glucosidic bonds of the α-1,6 type in amylopectin and having an enzymatic activity in an acid medium and at a temperature of about 60° C.
The invention also relates to strains of microorganisms which produce this pullulanase and processes for the preparation of this pullulanase.
The invention also relates to the uses thereof and compositions comprising the product.
The invention also relates to a DNA molecule. The invention relates to an expression vector containing this DNA molecule and to a chromosomal integration vector containing this DNA molecule.
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Citations
21 Claims
- 1. An enzymatic composition comprising a pullulanase produced by Bacillus deramificans, or by a derivative or a mutant strain thereof that retains all identifying characteristics of said species.
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12. A process for the saccharification of starch, wherein said process allows for reduced concentrations of saccharification by-products, comprising the step of contacting aqueous liquefied starch with an enzyme composition comprising pullulanase produced by B. deramificans or by a derivative or a mutant strain thereof that retains all the identifying characteristics of said species or a B. deramificans pullulanase derivative or mutant thereof, wherein said pullulanase derivative or mutant is capable of hydrolyzing α
- -1,6-glucosidic bonds.
- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
Specification