Enzymatic production of D-tagatose
First Claim
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1. An enzymatic process for preparing tagatose from a starch derivative, the process comprising the steps of:
- (i) converting a saccharide to glucose 1-phosphate (G1P) using alpha glucan phosphorylase (α
GP), wherein the saccharide is selected from one or more derivatives of starch;
(ii) converting G1P to glucose 6-phosphate (G6P) using a phosphoglucomutase (PGM);
(iii) converting G6P to fructose 6-phosphate (F6P) using a phosphoglucoisomerase (PGI);
(iv) converting fructose 6-phosphate (F6P) to tagatose 6-phosphate (T6P) catalyzed by a fructose 6-phosphate epimerase (F6PE); and
(v) converting the T6P produced to tagatose catalyzed by a tagatose 6-phosphate phosphatase (T6PP)wherein steps (i)-(v) are conducted in a single reaction vessel.
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Abstract
The current disclosure provides a process for enzymatically converting a saccharide into tagatose. The invention also relates to a process for preparing tagatose where the process involves converting fructose 6-phosphate (F6P) to tagatose 6-phosphate (T6P), catalyzed by an epimerase, and converting the T6P to tagatose, catalyzed by a phosphatase.
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15 Claims
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1. An enzymatic process for preparing tagatose from a starch derivative, the process comprising the steps of:
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(i) converting a saccharide to glucose 1-phosphate (G1P) using alpha glucan phosphorylase (α
GP), wherein the saccharide is selected from one or more derivatives of starch;(ii) converting G1P to glucose 6-phosphate (G6P) using a phosphoglucomutase (PGM); (iii) converting G6P to fructose 6-phosphate (F6P) using a phosphoglucoisomerase (PGI); (iv) converting fructose 6-phosphate (F6P) to tagatose 6-phosphate (T6P) catalyzed by a fructose 6-phosphate epimerase (F6PE); and (v) converting the T6P produced to tagatose catalyzed by a tagatose 6-phosphate phosphatase (T6PP) wherein steps (i)-(v) are conducted in a single reaction vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification