Phosphorylated waxy potato starch
AssigneeBayer CropScience AG
InventorsStephan Soyka, Jens Pilling, Claus Frohberg
Life of this patent
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Abstract
The invention relates to potato starches having an amylose content of less than 10% by weight, a phosphate content in the C6 position of between 35 and 100 nmol of phosphate per milligram of starch and a content of side chains having a DP of from 12 to 19 which is elevated as compared with that in potato starch from corresponding wild-type potato plants.
Claims30
A potato starch comprising an amylose content as measured by the method of Hovenkamp-Hermelink et al., of less than 10% by weight, a phosphate content in the C6 position of between 35 and 100 nmol of phosphate per milligram of starch (dry weight), and a proportion of side chains having a degree of polymerization (DP) of from 12 to 19 which is increased to 125%-200% as compared with potato starch from corresponding wild-type potato plants.
A potato starch comprising an amylose content, as measured by the method of Hovenkamp-Hermelink et al., of less than 10% by weight, a phosphate content in the C6 position is between 35 and 100 nmol of phosphate per milligram of starch (dry weight), a total phosphate content to phosphate content in the C6 position ratio of 1.20-1.50, and a proportion of side chains having a DP of from 12 to 19 which is increased to 125%-200% as compared with that in potato starch from corresponding wild-type potato plants.
A potato starch isolated from a potato plant cell which exhibits an activity
- (a) of one or more SSIII proteins which occur endogenously in the plant cell;
- (b) of one or more BEI proteins which occur endogenously in the plant cell;
- (c) of one or more GBSSI proteins which occur endogenously in the plant cell;
- and
- (d) of one or more proteins which occur endogenously in the plant cell and which exhibit an at least 90% identity with the amino acid sequence of SEQ ID NO:
- 12 or SEQ ID NO:
- 14,
- which is reduced as compared with that of corresponding wild-type potato plant cells, and
- wherein said starch has a proportion of side chains having a degree of polymerization (DP) of from 12 to 19 which is increased to 125%-200% as compared with potato starch from corresponding wild-type potato plants.
A method of manufacturing a potato starch comprising extracting starch from a potato plant cell, wherein said plant cell exhibits an activity
- (a) of one or more SSIII proteins which occur endogenously in the plant;
- (b) of one or more BEI proteins which occur endogenously in the plant;
- (c) of one or more GBSSI proteins which occur endogenously in the plant;
- and
- (d) of one or more proteins which occur endogenously in the plant and which exhibit an at least 90% identity with the amino acid sequence of SEQ ID NO:
- 12 or SEQ ID NO:
- 14,
- which is reduced as compared with that of corresponding wild-type potato plant cells, and
- wherein said starch has a proportion of side chains having a degree of polymerization (DP) of from 12 to 19 which is increased to 125%-200% as compared with potato starch from corresponding wild-type potato plants.
Dependencies are inferred from the claim text.