EP4687459A1 - Methods for modifying texture in foodstuff via preferably in situ produced alpha-glucan - Google Patents
Methods for modifying texture in foodstuff via preferably in situ produced alpha-glucanInfo
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- EP4687459A1 EP4687459A1 EP24721379.6A EP24721379A EP4687459A1 EP 4687459 A1 EP4687459 A1 EP 4687459A1 EP 24721379 A EP24721379 A EP 24721379A EP 4687459 A1 EP4687459 A1 EP 4687459A1
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- Prior art keywords
- precursor
- alpha
- food product
- glucan
- enzyme
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/20—Reducing nutritive value; Dietetic products with reduced nutritive value
- A23L33/21—Addition of substantially indigestible substances, e.g. dietary fibres
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; PREPARATION THEREOF
- A23C9/00—Milk preparations; Milk powder or milk powder preparations
- A23C9/12—Fermented milk preparations; Treatment using microorganisms or enzymes
- A23C9/13—Fermented milk preparations; Treatment using microorganisms or enzymes using additives
- A23C9/137—Thickening substances
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/06—Enzymes
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/20—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0009—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid alpha-D-Glucans, e.g. polydextrose, alternan, glycogen; (alpha-1,4)(alpha-1,6)-D-Glucans; (alpha-1,3)(alpha-1,4)-D-Glucans, e.g. isolichenan or nigeran; (alpha-1,4)-D-Glucans; (alpha-1,3)-D-Glucans, e.g. pseudonigeran; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0009—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid alpha-D-Glucans, e.g. polydextrose, alternan, glycogen; (alpha-1,4)(alpha-1,6)-D-Glucans; (alpha-1,3)(alpha-1,4)-D-Glucans, e.g. isolichenan or nigeran; (alpha-1,4)-D-Glucans; (alpha-1,3)-D-Glucans, e.g. pseudonigeran; Derivatives thereof
- C08B37/0021—Dextran, i.e. (alpha-1,4)-D-glucan; Derivatives thereof, e.g. Sephadex, i.e. crosslinked dextran
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/02—Dextran; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/1048—Glycosyltransferases (2.4)
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/1048—Glycosyltransferases (2.4)
- C12N9/1051—Hexosyltransferases (2.4.1)
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/04—Polysaccharides, i.e. compounds containing more than five saccharide radicals attached to each other by glycosidic bonds
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/04—Polysaccharides, i.e. compounds containing more than five saccharide radicals attached to each other by glycosidic bonds
- C12P19/08—Dextran
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/18—Preparation of compounds containing saccharide radicals produced by the action of a glycosyl transferase, e.g. alpha-, beta- or gamma-cyclodextrins
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y204/00—Glycosyltransferases (2.4)
- C12Y204/01—Hexosyltransferases (2.4.1)
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y204/00—Glycosyltransferases (2.4)
- C12Y204/01—Hexosyltransferases (2.4.1)
- C12Y204/01005—Dextransucrase (2.4.1.5)
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2200/00—Function of food ingredients
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2200/00—Function of food ingredients
- A23V2200/14—Mouthfeel improving agent
Definitions
- Texture relates to consumer eating sensation and heavily impacts consumer perception.
- a disadvantage of added stabilizers is that they can increase the total carbohydrate level and caloric content of food and often require special handling during processing.
- Plant-based or non-dairy protein food alternatives such as soy, almond, pea, bean, rice or oat-based milks or fresh fermented products, are one of the fastest growing segments in all food product categories worldwide (2016, Gurkinen et al., Crit. Rev. Food Sci. Nutr.56:339-349; Sethi et al., 2016, J. Food Sci. Technol.53:3408- 3423).
- most plant-based proteins lack a functional balance (Sethi et al., ibid.).
- the present disclosure concerns a method of producing a food product/precursor, the method comprising: (a) providing a food product/precursor that comprises at least water and sucrose, and (b) contacting the food product/precursor with at least one glucosyltransferase enzyme and a second enzyme that utilizes sucrose as a substrate, wherein the glucosyltransferase enzyme is: (i) a glucosyltransferase enzyme that synthesizes alpha-1,6-glucan, wherein at least about 50% of the glycosidic linkages of the alpha-1,6-glucan are alpha-1,6 linkages, and/or (ii) a glucosyltransferase enzyme that synthesizes alpha-1,3-glucan, wherein at least about 50% of the glycosidic linkages of the alpha-1,3-glucan are alpha-1,3 linkages, typically where
- the provision of the second enzyme that utilizes sucrose as a substrate is optional.
- the present disclosure concerns a method of producing a food product/precursor, the method comprising: (a) providing a food product/precursor that comprises at least water, sucrose and at least one carbohydrate-containing ingredient, and (b) contacting the food product/precursor with at least one glucosyltransferase enzyme, wherein the glucosyltransferase enzyme is: (i) a glucosyltransferase enzyme that synthesizes alpha-1,6-glucan, wherein at least about 50% of the glycosidic linkages of the alpha-1,6-glucan are alpha-1,6 linkages, and/or (ii) a glucosyltransferase enzyme that synthesizes alpha-1,3-glucan, wherein at least about 50% of the glycosidic linkages of the alpha-1,3-glucan are alpha-1,3 linkages,
- FIG.1 Sugar content in YO-MIX 410 yogurt samples.
- FIG.2 The apparent viscosity of YO-MIX 410 yogurt samples extracted at a shear rate of 11.7 Hz, which provides a measurement of product thickness.
- FIG.3 The apparent viscosity of YO-MIX 410 yogurt samples extracted at a shear rate of 249 Hz, which provides a measurement of product mouthfeel.
- FIG.4 Flow curves are shown that resulted from rotational rheological tests. Refer to Example 2.
- FIG.5 Sugar content of YO-MIX PRIME 900, YO-MIX 410, YO-MIX T42, YO- MIX M01 and YO-MIX 863 yogurt samples treated with various GTF enzyme regimens.
- YO-MIX PRIME 900 Sugar content of YO-MIX PRIME 900, YO-MIX 410, YO-MIX T42, YO- MIX M01 and YO-MIX 863 yogurt samples treated with various GTF enzyme regimens.
- FIGs.6A-E Spider plot of sensory data measured for YO-MIX 863 (FIG.6A), YO-MIX PRIME 900 (FIG.6B), YO-MIX 410 (FIG.6C), YO-MIX T42 (FIG.6D) and YO- MIX M01 (FIG.6E) yogurt samples having 3% starch or treatment with vGTFJ alone (0:100 % [GTF 0768 : vGTFJ]) or both vGTFJ and GTF 0768 (90:10 % [GTF 0768 : vGTFJ]).
- vGTFJ alone
- FIG.7 The apparent sweetness of YO-MIX 863, YO-MIX PRIME 900, YO-MIX 410, YO-MIX T42 and YO-MIX M01 yogurt samples treated with vGTFJ alone (0:100 % [GTF 0768 : vGTFJ]) or both vGTFJ and GTF 0768 (90:10 % [GTF 0768 : vGTFJ]), relative to the 3% starch samples (not enzyme-treated).
- vGTFJ alone 100 % [GTF 0768 : vGTFJ]
- GTF 0768 90:10 % [GTF 0768 : vGTFJ]
- FIG 8. Sugar content in YO-MIX 410 yogurts treated with glucosyltransferase enzymes (vGTFJ, GTF 0768) and/or lactase/transgalactosidase enzymes.
- FIG.9 The apparent viscosity of YO-MIX 410 yogurt samples treated with glucosyltransferase enzymes (vGTFJ, GTF 0768) and/or lactase/transgalactosidase enzymes, as measured by extraction at a shear rate of 11.7 Hz, which provides a measurement of product thickness.
- FIG.10 The apparent viscosity of YO-MIX 410 yogurt samples treated with glucosyltransferase enzymes (vGTFJ, GTF 0768) and/or lactase/transgalactosidase enzymes, as measured by extraction at a shear rate of 249 Hz, which provides a measurement of mouthfeel.
- FIG.11 Sugar content of substrates A-E with or without treatment with GTF 0974, GTF 0768, or v2GTFJ.
- Example 4 Sugar content of substrates A-E with or without treatment with GTF 0974, GTF 0768, or v2GTFJ.
- FIG.12 For each of substrates A-E with or without treatment with GTF 0974, GTF 0768, or v2GTFJ, bar height indicates percent sucrose reduction as compared to substrate reference as initially prepared (e.g., prior to NURICA enzyme incubation for forming substrate C, and prior to TGO enzyme incubation for forming substrate E). The interior of each bar shows the relative oligosaccharide and polysaccharide content (dry weight basis) as a percentage of the total content of oligosaccharides and polysaccharides. Refer to Example 4.
- FIG.13 The apparent viscosity of substrates A-E with or without treatment with GTF 0974, GTF 0768, or v2GTFJ, as measured by extraction at a shear rate of 11.7 Hz, which provides a measurement of product thickness.
- FIG.14 The apparent viscosity of substrates A-E with or without treatment with GTF 0974, GTF 0768, or v2GTFJ, as measured by extraction at a shear rate of 249 Hz, which provides a measurement of mouthfeel.
- FIGs.15A-B Neutral beverages initially prepared without maltose (FIG.15A) or with maltose (FIG.15B), and then treated with GTF 0768, vGTFJ, or combinations thereof.
- bar height indicates percent sucrose reduction as compared to reference (no GTF treatment) (reference is at 0%, so no bar).
- the interior of each bar shows the relative oligosaccharide and polysaccharide content (dry weight basis) as a percentage of the total content of oligosaccharides and polysaccharides formed in each GTF-treated product. Refer to Example 5.
- FIG.16 The apparent viscosity of neutral beverages, initially with or without maltose prior to GTF treatment, resulting from treatment with GTF 0768, vGTFJ, or a combination thereof, as measured by extraction at a shear rate of 11.7 Hz, which provides a measurement of product thickness.
- FIG.17 The apparent viscosity of neutral beverages, initially with or without maltose prior to GTF treatment, resulting from treatment with GTF 0768, vGTFJ, or a combination thereof, as measured by extraction at a shear rate of 249 Hz, which provides a measurement of mouthfeel.
- Example 5 The apparent viscosity of neutral beverages, initially with or without maltose prior to GTF treatment, resulting from treatment with GTF 0768, vGTFJ, or a combination thereof, as measured by extraction at a shear rate of 249 Hz, which provides a measurement of mouthfeel.
- FIG.18 Viscosity of yogurt products over time (at 1, 7, 21, 35, or 63 days; bars shown in this order for each data set).
- FIG.19 Sugar content of yogurt products over time (at 0, 14, 28, 42, or 56 days).
- FIG.20 Melting profiles of ice cream samples.
- FIGs.21A-C Texture attributes (hardness [FIG.21A], cohesiveness [FIG.21B], adhesiveness [FIG.21C]) of ice cream samples.
- FIG.22 Extensional rheometry (Hencky strain vs. time, at a rate of 1 mm/s) of sweet condensed milk samples.
- FIG.23 Treatment of skim milk with invertase alone (top row) or invertase plus vGTFJ (bottom row).
- FIG.24 Treatment of yogurt with invertase alone (bottom row) or invertase plus vGTFJ (top row).
- FIG.25 Ketchup samples prepared, in part, using a blend of GTF 0768 and vGTFJ enzymes.
- FIG.26 Ketchup samples prepared, in part, using blends of GTF 0768 and vGTFJ enzymes.
- Table A Summary of Protein SEQ ID Numbers Protein O. GTF 0768. Mature, wild type form of L. 2 pseudomesenteroides protein (US2016/0122445).
- alpha-glucan is a polymer comprising glucose monomeric units linked together by alpha-glycosidic linkages.
- an alpha- glucan herein comprises at least about 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% alpha- glycosidic linkages.
- alpha-glucan polymers herein include graft copolymers as presently disclosed, as well as alpha-1,3-glucan and alpha-1,6-glucan.
- alpha-1,3-glucan poly alpha-1,3-glucan
- alpha-1,3-glucan polymer alpha-1,3-glucan polymer
- Alpha-1,3-glucan is a polymer comprising glucose monomeric units linked together by glycosidic linkages, wherein at least about 50% of the glycosidic linkages are alpha-1,3.
- Alpha-1,3-glucan in certain embodiments comprises at least about 90% or 95% alpha-1,3 glycosidic linkages.
- alpha-1,3-glucan typically are alpha-1,6, though some linkages may also be alpha-1,2 and/or alpha-1,4.
- Alpha-1,3-glucan as presently disclosed can characterize an alpha-1,3-glucan side chain herein.
- alpha-1,3-glucan can characterize an alpha-1,3-glucan “homopolymer”, which is alpha- 1,3-glucan that is not part of a dextran-alpha-1,3-glucan copolymer.
- extract refers to a water-soluble alpha-glucan comprising at least 50%, 60%, 70%, 80%, or 90% alpha-1,6 glycosidic linkages (with the balance of the linkages typically being alpha-1,3).
- Enzymes capable of synthesizing dextran from sucrose may be described as “dextransucrases” (EC 2.4.1.5).
- a “substantially linear” (“mostly linear”, and like terms) dextran has 5% or less branches, before being modified herein to have with alpha-1,3-glucan side chains.
- a “linear” dextran has no branches, before being modified herein to have alpha-1,3-glucan side chains. Branches, if present prior to modification of dextran with alpha-1,3-glucan side chains, can be short, being one (pendant) to three glucose monomers in length. Yet, in some aspects, dextran can be “dendritic”, which is a branched structure emanating from a core in which there are chains (containing mostly or all alpha-1,6-linkages) that iteratively branch from each other (e.g., a chain can be a branch from another chain, which in turn is a branch from another chain, and so on).
- dextran is not dendritic, but has a branch-on-branch structure that does not emanate from a core.
- Dextran as used in a glucosyltransferase reaction herein for alpha-1,3-glucan synthesis can optionally be characterized as a “primer” or “acceptor”.
- dextran can characterize a dextran “homopolymer”, which is dextran that is not part of a dextran-alpha-1,3-glucan copolymer.
- copolymer herein refers to a polymer comprising at least two different types of alpha-glucan, such as dextran and alpha-1,3-glucan.
- graft copolymer branched copolymer and the like herein generally refer to a copolymer comprising a “backbone” (or “main chain”) and one or more side chains branching from the backbone. The side chains are structurally distinct from the backbone.
- graft copolymers herein are “dextran-alpha-1,3-glucan graft copolymers” (and like terms) that comprise a backbone comprising dextran, and one or more side chains of alpha-1,3-glucan.
- a backbone in some aspects can itself be a branched dextran as disclosed herein; the addition of alpha-1,3-glucan side chains to such a backbone (thereby forming a graft copolymer herein) can be, for example, via enzymatic extension from non-reducing ends presented by short branches (alpha-1,2, - 1,3, or -1,4 branch, each typically comprised of a single glucose monomer; i.e., pendant glucose).
- Short branches that can be enzymatically extended into an alpha-1,3-glucan side chain
- alpha-1,3-glucan can also be synthesized from non-reducing ends of dextran main chains, such as in embodiments in which the dextran backbone is linear or mostly linear, or embodiments in which the dextran backbone is branching (e.g., dendritic, or not dendritic [branches do not emanate from a core] but has branch-on-branch structure); such alpha-1,3-glucan is not, technically-speaking, a side chain to the dextran, but rather an extension from the dextran main chain(s).
- the percent branching in an alpha-glucan herein refers to that percentage of all the linkages in the alpha-glucan that represent branch points.
- the percent of alpha-1,3 branching in an alpha-glucan herein refers to that percentage of all the linkages in the glucan that represent alpha-1,3 branch points. Except as otherwise noted, linkage percentages disclosed herein are based on the total linkages of a glucan, or the portion of a glucan for which a disclosure specifically regards.
- linkage refers to the covalent bonds connecting the sugar monomers within a saccharide compound (oligosaccharides and/or polysaccharides).
- glycosidic linkages examples include 1,6- alpha-D-glycosidic linkages (herein also referred to as “alpha-1,6” linkages), 1,3-alpha- D-glycosidic linkages (herein also referred to as “alpha-1,3” linkages), 1,4-alpha-D- glycosidic linkages (herein also referred to as “alpha-1,4” linkages), and 1,2-alpha-D- glycosidic linkages (herein also referred to as “alpha-1,2” linkages).
- the glycosidic linkages of a glucan polymer herein can also be referred to as “glucosidic linkages”.
- alpha-D-glucose is referred to as “glucose”.
- the glycosidic linkage profile of an alpha-glucan herein can be determined using any method known in the art.
- a linkage profile can be determined using methods using nuclear magnetic resonance (NMR) spectroscopy (e.g., 13 C NMR or 1 H NMR).
- NMR nuclear magnetic resonance
- 13 C NMR 13 C NMR or 1 H NMR
- molecular weight of an alpha-glucan herein can be represented as weight- average molecular weight (Mw) or number-average molecular weight (Mn), the units of which are in Daltons (Da) or grams/mole.
- molecular weight can be represented as DPw (weight average degree of polymerization) or DPn (number average degree of polymerization).
- molecular weight can sometimes be provided as “DP” (degree of polymerization), which simply refers to the number of glucoses comprised within the alpha-glucan on an individual molecule basis.
- DP degree of polymerization
- Various means are known in the art for calculating these various molecular weight measurements such as with high-pressure liquid chromatography (HPLC), size exclusion chromatography (SEC), or gel permeation chromatography (GPC).
- HPLC high-pressure liquid chromatography
- SEC size exclusion chromatography
- GPC gel permeation chromatography
- sugar herein refers to a non-reducing disaccharide composed of an alpha-D-glucose molecule and a beta-D-fructose molecule linked by an alpha-1,2- glycosidic bond. Sucrose is known commonly as table sugar.
- Sucrose can alternatively be referred to as “alpha-D-glucopyranosyl-(1 ⁇ 2)-beta-D-fructofuranoside”. “Alpha-D- glucopyranosyl” and “glucosyl” are used interchangeably herein.
- sucrose refers to any monosaccharide (e.g., fructose, glucose, and/or galactose) and/or disaccharide (e.g., sucrose, leucrose, and/or lactose; and/or optionally DP2 gluco- oligosaccharide), and/or optionally any oligosaccharide (e.g., ranging from DP3 to DP4, DP5, DP6, DP7, DP8, DP9, DP10, DP12, DP14, DP15, DP16, DP18, or DP20; typically gluco-oligosaccharide) such as those disclosed herein.
- monosaccharide e.g., fructose, glucose, and/or galactose
- disaccharide e.g., sucrose, leucrose, and/or lactose
- any oligosaccharide e.g., ranging from DP3 to
- Sugars herein typically are water-soluble.
- the terms “glucosyltransferase”, “glucosyltransferase enzyme”, “GTF”, “glucansucrase” and the like are used interchangeably herein.
- the activity of a glucosyltransferase herein catalyzes the reaction of the substrate sucrose to make the products alpha-glucan and fructose.
- Other products (by-products) of a GTF reaction can include glucose, various soluble gluco-oligosaccharides, and leucrose.
- Wild type forms of glucosyltransferase enzymes generally contain (in the N-terminal to C-terminal direction) a signal peptide (which is typically removed by cleavage processes), a variable domain, a catalytic domain, and a glucan-binding domain.
- a glucosyltransferase herein is classified under the glycoside hydrolase family 70 (GH70) according to the CAZy (Carbohydrate-Active EnZymes) database (Cantarel et al., Nucleic Acids Res.37:D233- 238, 2009).
- the term “dextransucrase” (and like terms) can optionally be used to characterize a glucosyltransferase enzyme that produces dextran.
- glucosyltransferase catalytic domain refers to the domain of a glucosyltransferase enzyme that provides alpha-glucan-synthesizing activity to a glucosyltransferase enzyme.
- a glucosyltransferase catalytic domain typically does not require the presence of any other domains to have this activity.
- enzyme reaction “glucosyltransferase reaction”, “glucan synthesis reaction”, “reaction composition”, “reaction formulation” and the like are used interchangeably herein and generally refer to a reaction that initially comprises water, sucrose, at least one active glucosyltransferase enzyme, and optionally other components.
- Components that can be further present in a glucosyltransferase reaction typically after it has commenced include fructose, glucose, leucrose, soluble gluco- oligosaccharides (e.g., DP2-DP7) (such may be considered as products or by-products, depending on the glucosyltransferase used), and/or insoluble alpha-glucan product(s) of DP8 or higher.
- DP2-DP7 soluble gluco- oligosaccharides
- DP8 insoluble alpha-glucan product(s) of DP8 or higher.
- certain glucan products such as alpha-1,3- glucan with a degree of polymerization (DP) of at least 8 or 9, are water-insoluble and thus not dissolved in a glucan synthesis reaction.
- the term “under suitable reaction conditions” as used herein refers to reaction conditions that support conversion of sucrose to alpha-glucan product(s) via glucosyltransferase enzyme activity. It is during such a reaction that glucosyl groups originally derived from the input sucrose are enzymatically transferred and used in alpha-glucan polymer synthesis; glucosyl groups as involved in this process can thus optionally be referred to as the glucosyl component or moiety (or like terms) of a glucosyltransferase reaction.
- the “yield” of an alpha-glucan product in a glucosyltransferase reaction in some aspects herein represents the molar yield based on the converted sucrose.
- the molar yield of an alpha-glucan product can be calculated based on the moles of the alpha- glucan product divided by the moles of the sucrose converted. Moles of converted sucrose can be calculated as follows: (mass of initial sucrose – mass of final sucrose) / molecular weight of sucrose [342 g/mol]. This molar yield calculation can be considered as a measure of selectivity of the reaction toward the alpha-glucan.
- the “yield” of an alpha-glucan product in a glucosyltransferase reaction can be based on the glucosyl component of the reaction.
- the fructose balance of a glucosyltransferase reaction can be measured to ensure that HPLC data, if applicable, are not out of range (90-110% is considered acceptable).
- invertase refers to an enzyme that can irreversibly catalyze the hydrolysis of sucrose to glucose and fructose (i.e., an enzyme that can use sucrose to produce invert sugar).
- An invertase herein is of Enzyme Commission (EC) No.3.2.1.26, and classified under the glycoside hydrolase family 32 (GH32; Henrissat, Biochem. J.280:309-316).
- An invertase is an example of a second enzyme of the present disclosure that utilizes sucrose as a substrate.
- a “second enzyme that utilizes sucrose as a substrate”, “second enzyme that uses sucrose”, “second enzyme” and like terms of the present disclosure refer to an enzyme, other than a glucosyltransferase of the present disclosure, that can catalyze a reaction that converts sucrose into one or more different compounds, thereby reducing the amount of sucrose present.
- Such a second enzyme typically is not intended to refer to a glucosyltransferase (GH70) herein.
- a suitable second enzyme of the present disclosure examples include invertase, fructosyltransferase enzyme (FTF, EC 2.4.1.99) (e.g., inulosucrase, levansucrase), sucrose synthase (EC 2.4.1.13), sucrose phosphorylase (EC 2.4.1.7), and sucrose alpha-glucosidase (EC 3.2.1.48).
- FFF fructosyltransferase enzyme
- FFF fructosyltransferase enzyme
- FFF fructosyltransferase enzyme
- FFF fructosyltransferase enzyme
- EC 2.4.1.99 e.g., inulosucrase, levansucrase
- sucrose synthase EC 2.4.1.13
- sucrose phosphorylase EC phosphorylase
- sucrose alpha-glucosidase EC 3.2.1.48
- Such produced alpha-glucan can be soluble or insoluble. While an alpha-1,3-glucan product is typically insoluble and an alpha-1,6-glucan product is typically soluble, a graft copolymer product can either be soluble or insoluble, in a food product/precursor herein.
- In situ production of alpha-glucan in a food product/precursor typically substitutes for adding alpha-glucan herein as an ingredient in food, though such addition can be performed if desired (e.g., to supplement the alpha-glucan produced in situ).
- in situ in relevant aspects herein also characterizes a second enzyme (e.g., invertase) reaction(s) that occurs inside a food product or precursor thereof and thereby produces fructose and glucose within the food product itself (or precursor).
- in situ glucosyltransferase and second enzyme reactions of the present disclosure occur during the same time period and thereby compete for sucrose substrate.
- percent by volume “volume percent”, “vol %”, “v/v %” and the like are used interchangeably herein. The percent by volume of a solute in a solution can be determined using the formula: [(volume of solute)/(volume of solution)] x 100%.
- Percent by weight refers to the percentage of a material on a mass basis as it is comprised in a composition, mixture, or solution.
- weight/volume percent refers to the percentage of a material on a mass basis as it is comprised in a composition, mixture, or solution.
- Weight/volume percent can be calculated as: ((mass [g] of material)/(total volume [mL] of the material plus the liquid in which the material is placed)) x 100%.
- the material can be insoluble in the liquid (i.e., be a solid phase in a liquid phase, such as with a dispersion), or soluble in the liquid (i.e., be a solute dissolved in the liquid).
- ingestible product and “ingestible composition” are used interchangeably herein, and refer to any substance that, either alone or together with another substance, may be taken orally (i.e., by mouth), whether intended for consumption or not.
- an ingestible product includes food/beverage products.
- Food/beverage products refer to any edible product intended for consumption (e.g., for nutritional purposes) by humans or animals, including solids, semi-solids, or liquids.
- a “food” herein can optionally be referred to as a “foodstuff”, “food product”, or other like term, for example.
- a beverage or other ingestible liquid is an example of a food product. While the present disclosure generally regards food and food precursors that are by definition intended for ingestion or eventual ingestion (food precursor first made into food before being eaten), the disclosure likewise regards other ingestible products (e.g., supplement, nutraceutical, pharmaceutical product) comprising in situ-produced alpha-glucan.
- a food precursor herein can be (i) a food as it exists before one or more processing steps (e.g., fermentation, aging, cooling/freezing, heating, baking, mixing) that render it to be a food product intended for direct consumption, and/or (ii) an ingredient for use in preparing a food product, for example.
- a food precursor can characterize a food product or ingredient as it exists before treatment with one or more GTF enzymes and second enzymes in a method herein.
- the term “texture” as used herein in reference to a food product/precursor herein means the thickness of the food product/precursor and/or sensory perception of the food product/precursor by, for example, vision, touch, or oral/taste processing.
- an “improvement” in texture means an increase in thickness and/or an increase in the sensory perception.
- the “thickness” of a food product/precursor means the apparent viscosity extracted at shear rate of about 10-13 Hz (e.g., ⁇ 11.7 Hz) during a rheological analysis; an increase in apparent viscosity at such a shear rate indicates an increase in thickness.
- the apparent viscosity extracted at shear rate of about 230-270 Hz (e.g., ⁇ 249 Hz) during a rheological analysis is correlated to “mouthfeel”; an increase in apparent viscosity at such a shear rate indicates an increase in mouthfeel.
- dairy product/precursor and like terms herein refer to a food product/precursor that contains milk and/or is made from milk. In some aspects, a dairy product/precursor contains at least about 2.5, 5, or 10 wt% milk or milk solids.
- lactase-treated milk/dairy and like terms herein refer to milk/dairy products or precursors treated with one or more lactase enzymes to reduce the amount of lactose sugar therein.
- Reduced lactose milk/dairy and like terms herein refer to milk/dairy products or precursors in which the weight percentage of lactose is about 2% or less, for example.
- “Lactose-free milk/dairy” and like terms herein refer to milk/dairy products or precursors in which the weight percentage of lactose is about 0.5 wt% or less, for example.
- “Yogurt”, “dairy-based yogurt”, “fermented dairy product” and like terms herein generally refer to a dairy food/beverage produced by acidifying lactic fermentation of a dairy substrate such as milk. Such a product can optionally contain secondary ingredients such as fruits, vegetables, sugars, flavors, etc.
- “Flour” and like terms herein refer to powder made by grinding (milling) grains/cereals, roots/tubers, beans/legumes, or nuts/seeds, for example.
- “Dough”, “food dough” and like terms herein refer to a mixture comprising at least (i) flour and/or meal and (ii) a liquid (e.g., water or milk), and typically is in a suitable form (stiff/firm) for kneading or rolling.
- a dough can optionally be referred to with reference to the grain, grain derivative, or other material from which it was derived (e.g., wheat dough, wheat flour dough, corn flour dough, cornmeal dough). Since dough typically is not eaten as a food prior to further processing (e.g., baking), dough can optionally be characterized as a “food precursor”.
- a “baked food” (and like terms) herein refers to a food that has been baked during its preparation.
- dietary fiber refers to an alpha- glucan that is indigestible and/or that does not increase blood-glucose levels when enterally administered to a mammal.
- a dietary fiber herein is not significantly hydrolyzed by endogenous enzymes in the upper gastrointestinal tract of mammals such as humans.
- “Fermentation” and like terms herein as applied to food product/precursor refer to the conversion of carbohydrates in a food product/precursor into alcohol(s) and/or acid(s) through the action of one or more microorganisms (e.g., bacteria, yeast).
- a composition herein that is “dry” or “dried” typically has less than 5, 4, 3, 2, 1, 0.5, or 0.1 wt% water comprised therein.
- aqueous liquid aqueous fluid
- aqueous conditions aqueous conditions
- aqueous setting aqueous system
- aqueous solution can comprise one or more dissolved salts, where the maximal total salt concentration can be about 3.5 wt% in some embodiments.
- aqueous liquids herein typically comprise water as the only solvent in the liquid, an aqueous liquid can optionally comprise one or more other solvents (e.g., polar organic solvent) that are miscible in water.
- the “stability” (or the quality of being “stable”) of a dispersion or emulsion herein is, for example, the ability of dispersed particles of a dispersion, or liquid droplets dispersed in another liquid (emulsion), to remain dispersed (e.g., about, or at least about, 70, 75, 80, 85, 90, 95, 96, 97, 98, 99, or 100 wt% of the particles of the dispersion or liquid droplets of the emulsion are in a dispersed state) for a period of about, or at least about, 2, 4, 6, 9, 12, 18, 24, 30, or 36 months following initial preparation of the dispersion or emulsion.
- polypeptide is interchangeable with the terms “peptides” and “proteins”.
- Typical amino acids contained in polypeptides herein include (respective three- and one-letter codes shown parenthetically): alanine (Ala, A), arginine (Arg, R), asparagine (Asn, N), aspartic acid (Asp, D), cysteine (Cys, C), glutamic acid (Glu, E), glutamine (Gln, Q), glycine (Gly, G), histidine (His, H), isoleucine (Ile, I), leucine (Leu, L), lysine (Lys, K), methionine (Met, M), phenylalanine (Phe, F), proline (Pro, P), serine (Ser, S), threonine (Thr, T), tryptophan (Trp, W), tyrosine (Tyr, Y), valine (Val, V).
- sequence identity refers to amino acid residues in two sequences that are the same when aligned for maximum correspondence over a specified comparison window.
- percentage of sequence identity refers to the value determined by comparing two optimally aligned sequences over a comparison window, wherein the portion of the polypeptide sequence in the comparison window may comprise additions or deletions (i.e., gaps) as compared to the reference sequence (which does not comprise additions or deletions) for optimal alignment of the two sequences.
- the percentage is calculated by determining the number of positions at which the identical amino acid residue occurs in both sequences to yield the number of matched positions, dividing the number of matched positions by the total number of positions in the window of comparison and multiplying the results by 100 to yield the percentage of sequence identity.
- Percent identity can be readily determined by any known method, including but not limited to those described in: 1) Computational Molecular Biology (Lesk, A.M., Ed.) Oxford University: NY (1988); 2) Biocomputing: Informatics and Genome Projects (Smith, D.W., Ed.) Academic: NY (1993); 3) Computer Analysis of Sequence Data, Part I (Griffin, A.M., and Griffin, H.G., Eds.) Humana: NJ (1994); 4) Sequence Analysis in Molecular Biology (von Heinje, G., Ed.) Academic (1987); and 5) Sequence Analysis Primer (Gribskov, M. and Devereux, J., Eds.) Stockton: NY (1991), all of which are incorporated herein by reference.
- Preferred methods for determining percent identity are designed to give the best match between the sequences tested. Methods of determining identity and similarity are codified in publicly available computer programs, for example. Sequence alignments and percent identity calculations can be performed using the MEGALIGN program of the LASERGENE bioinformatics computing suite (DNASTAR Inc., Madison, WI), for example. Multiple alignment of sequences can be performed, for example, using the Clustal method of alignment which encompasses several varieties of the algorithm including the Clustal V method of alignment (described by Higgins and Sharp, CABIOS. 5:151-153 (1989); Higgins, D.G. et al., Comput. Appl.
- the Clustal W method of alignment can be used (described by Higgins and Sharp, CABIOS.5:151-153 (1989); Higgins, D.G. et al., Comput. Appl. Biosci.8:189-191(1992); Thompson, J.D. et al, Nucleic Acids Research, 22 (22): 4673-4680, 1994) and found in the MEGALIGN v8.0 program of the LASERGENE bioinformatics computing suite (DNASTAR Inc.).
- Various polypeptide amino acid sequences are disclosed herein as features of certain embodiments. Variants of these sequences that are at least about 70-85%, 85- 90%, or 90%-95% identical to the sequences disclosed herein can be used or referenced.
- a variant amino acid sequence can have at least 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 99.5% identity with a sequence disclosed herein.
- a variant amino acid sequence herein has the same function/activity of the disclosed sequence, or at least about 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99.5% of the function/activity of the disclosed sequence.
- Any polypeptide amino acid sequence disclosed herein not beginning with a methionine or valine can typically further comprise at least a start-methionine or start-valine at the N-terminus of the amino acid sequence.
- any polypeptide amino acid sequence disclosed herein beginning with a methionine or valine can optionally lack such a methionine or valine residue.
- the numbering of particular amino acid residues of SEQ ID NO:10 herein (e.g., Tyr-185, Val-186, Leu-513, Gln-588, Phe-607, Ile-608, Lys-625, Arg-741, Val-1188, Lys- 1327, Glu-1332, Asp-1418, Ala-1419, Ser-1420, Thr-1421, Arg-1424, Leu-1425, Thr- 1431, Glu-1450) is with respect to the full-length amino acid sequence of SEQ ID NO:10.
- the first amino acid (i.e., position 1, Met-1) of SEQ ID NO:10 is at the start of the signal peptide.
- the provision of the second enzyme that utilizes sucrose as a substrate is optional.
- some embodiments of the present disclosure concern a method of producing a food product/precursor, where such a method can comprise: (a) providing a food product or food precursor (“food product/precursor”) that comprises at least water, sucrose and at least one carbohydrate-containing ingredient (optionally in addition to the sucrose source), and (b) contacting the food product/precursor with at least one glucosyltransferase enzyme, wherein the glucosyltransferase enzyme one or more of: (i) a glucosyltransferase enzyme that synthesizes alpha-1,6-glucan, wherein at least about 50% of the glycosidic linkages of the alpha-1,6- glucan are alpha-1,6 linkages, and/or (ii) a glucosyltransferase enzyme that synthesizes alpha-1,3-glucan, wherein at least about 50% of
- a dextransucrase herein is capable of producing dextran having a weight-average molecular weight (Mw) of about, at least about, or less than about, 1000, 2500, 5000, 7500, 10000, 25000, 50000, 75000, 100000, 150000, 200000, 250000, 500000, 750000, 1000000, 1000-10000, 1000-100000, 1000-1000000, 10000-100000, 10000- 1000000, or 100000-1000000 Daltons, for example.
- Mw weight- average molecular weight
- Dextran as disclosed elsewhere herein such as in a homopolymer or graft- copolymer can have any of the foregoing molecular weight profiles, for example.
- a GTF enzyme that synthesizes alpha-1,3-glucan herein can comprise an amino acid sequence that is about 100% identical to, or at least about 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 98.5%, 99%, or 99.5% identical to, SEQ ID NO:2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 26, 28, 30, 34, or 59, or amino acid residues 55- 960 of SEQ ID NO:4, residues 54-957 of SEQ ID NO:65, residues 55-960 of SEQ ID NO:30, residues 55-960 of SEQ ID NO:28, or residues 55-960 of SEQ ID NO:20, and have GTF activity; these amino acid sequences are disclosed in U.S.
- a GTF enzyme that synthesizes alpha-1,3-glucan in some aspects can be that identified as GTF 0974 (SEQ ID NO:13 herein, SEQ ID NO:110 in US2018/0291311), or a GTF comprising an amino acid sequence that is about 100% identical to, or at least about 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 98.5%, 99%, or 99.5% identical to, the foregoing amino acid sequence of GTF 0974 (and having GTF activity). Any of the foregoing GTF enzyme amino acid sequences can be modified as described herein to increase product yield, modify product molecular weight, and/or enhance GTF performance and/or stability.
- a GTF enzyme for producing alpha-1,3-glucan herein can, in some aspects, synthesize alpha-1,3-glucan at a yield of at least about 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, or 96%.
- Yield in some aspects can be measured based on the glucosyl component of the reaction, and/or as measured using HPLC or NIR spectroscopy. Yield can be achieved in a reaction conducted for about 16-24 hours (e.g., ⁇ 20 hours), for example.
- Examples of such a GTF enzyme are those having an amino acid sequence modified such that the enzyme produces more products (alpha-1,3-glucan and fructose), and less by-products (e.g., glucose, oligosaccharides such as leucrose), from a given amount of sucrose substrate.
- alpha-1,3-glucan and fructose e.g., glucose, oligosaccharides such as leucrose
- one, two, three, four, or more amino acid residues of the catalytic domain of an alpha-1,3-glucan-producing GTF herein can be modified/substituted to obtain a GTF enzyme that produces more products.
- Examples of a suitable modified GTF enzyme are disclosed in Tables 3-7 of U.S. Patent Appl. Publ. No.2019/0078063.
- a modified GTF enzyme for example, can comprise one or more amino acid substitutions corresponding with those in Tables 3-7 (ibid.) that is/are associated with an alpha-1,3- glucan yield of at least 40% (the position numbering of such at least one substitution corresponds with the position numbering of SEQ ID NO:62 as disclosed in U.S. Patent Appl. Publ. No.2019/0078063).
- a set of amino acid modifications as listed in Tables 6 or 7 (ibid.) can be used, for example.
- the amino acid sequence of a GTF enzyme for alpha-1,3-glucan synthesis in some aspects has been modified such that the enzyme produces alpha-1,3-glucan with a molecular weight (DPw) that is lower than the molecular weight of alpha-1,3-glucan produced by its corresponding parent GTF.
- DPw molecular weight
- Examples of a suitable modified GTF enzyme are disclosed in Tables 3 and 4 of U.S. Patent Appl. Publ. No.2019/0276806, which is incorporated herein by reference.
- a modified GTF enzyme for example, can comprise one or more amino acid substitutions corresponding with those in Tables 3 and/or 4 (ibid.) that is/are associated with an alpha-1,3-glucan product molecular weight that is at least 5% less than the molecular weight of alpha-1,3-glucan produced by parent enzyme (the position numbering of such at least one substitution corresponds with the position numbering of SEQ ID NO:62 as disclosed in U.S. Patent Appl. Publ. No.2019/0276806).
- a set of amino acid modifications as listed in Table 4 (ibid.) can be used, for example.
- the amino acid sequence of a GTF enzyme for alpha-1,3-glucan synthesis in some aspects has been modified such that the enzyme produces alpha-1,3-glucan with a molecular weight (DPw) that is higher than the molecular weight of alpha-1,3-glucan produced by its corresponding parent GTF.
- DPw molecular weight
- Examples of a suitable modified GTF enzyme are disclosed in Tables 3, 4 and 5 of U.S. Patent Appl. Publ. No.2019/0078062, which is incorporated herein by reference.
- a modified GTF enzyme for example, can comprise one or more amino acid substitutions corresponding with those in Tables 3, 4 and/or 5 (ibid.) that is/are associated with an alpha-1,3-glucan product molecular weight that is at least 5% higher than the molecular weight of alpha-1,3-glucan produced by parent enzyme (the position numbering of such at least one substitution corresponds with the position numbering of SEQ ID NO:62 as disclosed in U.S. Patent Appl. Publ. No.2019/0078062).
- a set of amino acid modifications as listed in Table 5 (ibid.) can be used, for example.
- a modified GTF for alpha-1,3-glucan synthesis (i) comprises at least one amino acid substitution or a set of amino acid substitutions (as described above regarding yield or molecular weight), and (ii) comprises or consists of a GTF catalytic domain that is at least about 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 99.5% identical to amino acid residues 55-960 of SEQ ID NO:4, amino acid residues 54-957 of SEQ ID NO:65, amino acid residues 55-960 of SEQ ID NO:30, amino acid residues 55-960 of SEQ ID NO:28, or amino acid residues 55-960 of SEQ ID NO:20 (each of these sequences as disclosed in U.S.
- a modified GTF comprises at least one amino acid substitution or a set of amino acid substitutions (as described above), and (ii) comprises or consists of an amino acid sequence that is at least about 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 99.5% identical to SEQ ID NO:62 or a subsequence thereof such as SEQ ID NO:4 (without start methionine thereof) or positions 55-960 of SEQ ID NO:4 (approximate catalytic domain) (each of these sequences as disclosed in U.S. Patent Appl. Publ. No.2019/0078063).
- modified alpha-1,3-glucan-producing GTF enzymes herein having enhanced performance and/or stability benefit(s) comprise or consist of SEQ ID NO:3 (vGTFJ) or 4. It is noted that SEQ ID NOs:3 and 4 are both derivable from SEQ ID NO:5 (GTF 6855), for example (e.g., SEQ ID NO:5 can be a backbone for making substitutions to render SEQ ID NOs:3 and 4).
- valine at position 1 of SEQ ID NO:4 in any of the foregoing aspects can optionally instead be a methionine, or can be deleted.
- Any of the amino acids listed above in aspects related to SEQ ID NOs:3 and 4 can optionally instead be another amino acid selected from Table B based on amino acid conservation. Table B.
- One, two, three, or more different GTF enzymes that synthesize alpha-1,6-glucan herein can be used, for example, in step (b) of producing a food product/precursor.
- one, two, three, or more different GTF enzymes that synthesize alpha-1,3- glucan herein can be used, for example.
- an alpha-1,6-glucan- producing GTF(s) can be added to (made to contact) a food product/precursor before adding an alpha-1,3-glucan-producing GTF(s), while in some aspects both these types of GTF enzymes can be added at about the same time (simultaneously).
- step (b) of producing a food product/precursor allows for production of a dextran-alpha-1,3-glucan graft copolymer as presently disclosed, possibly along with production of dextran and/or alpha-1,3-glucan homopolymer(s) (i.e., alpha-1,6-glucan and/or alpha-1,3-glucan produced independent from the production of graft copolymer).
- the molecular weight and/or linkage profile of alpha-glucan produced by a GTF enzyme can be as observed, for example, in an isolated reaction consisting of, or essentially of, water, sucrose, GTF enzyme and optionally one or more salts and/or buffer.
- the molecular weight and/or linkage profile of alpha-glucan as produced by one or both of these types of GTF enzyme in a food product/precursor herein may be different from what is produced in the foregoing isolated reaction.
- the ratio of the GTF enzyme that synthesizes alpha-1,6-glucan to the GTF enzyme that synthesizes alpha-1,3-glucan in step (b) is about 85:15 to about 95:5.
- each enzyme (active enzyme) for purposes of determining a ratio thereof herein can be on a molar, weight, or GTF activity basis, for example.
- the activity of a GTF enzyme for preparing a ratio herein can optionally be determined as disclosed in U.S. Patent Appl. Publ. No.2014/0087431, which is incorporated herein by reference, and/or as disclosed in the below Examples.
- a purified enzyme can be essentially free from insoluble and/or soluble components of an organism/cell used to produce the enzyme, and/or any medium that was used for cellular fermentation of the enzyme.
- a purified enzyme denotes an enzyme preparation that contains less than 10%, 8%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, or 0.1% by weight of other material (e.g., polypeptide material) with which the enzyme is natively or recombinantly associated.
- a GTF and/or any other enzyme herein is not comprised in or otherwise associated with (e.g., expressed by) a microbial (e.g., bacterial, yeast, fungal, algal) cell that might be present (e.g., endogenously or purposely added) in a food product/precursor herein; however, in some aspects a GTF and/or any other enzyme herein is comprised in or otherwise associated with (e.g., expressed by) a microbial (e.g., bacterial, yeast, fungal, algal) cell such as one that heterologously expresses the enzyme(s) (i.e., recombinant cells).
- a microbial e.g., bacterial, yeast, fungal, algal
- a GTF enzyme (or any other enzyme as presently disclosed such as a second enzyme that uses sucrose) for use in a method herein can be comprised in a sterile- filtered preparation, for example.
- an enzyme can be sterile-filtered inline while applying the enzyme to a food product/precursor during step (b) herein.
- an enzyme can be added to a food product/precursor that has been pasteurized (after pasteurization), or alternatively an enzyme can be added before pasteurizing the food product/precursor.
- an enzyme can be added to a food product/precursor that has been fermented (after fermentation), or alternatively an enzyme can be added during or before fermenting the food product/precursor.
- a GTF enzyme (or any other enzyme as presently disclosed such as a second enzyme that uses sucrose) in some aspects for use in a method herein can be comprised in a preparation (for adding in step [b] herein) that is substantially free of (e.g., ⁇ 0.5, ⁇ 0.1, ⁇ 0.05 wt%) any other enzyme(s) such as a lipase, protease, amylase, mannanase, pectinase, cellulase, and/or p-nitrobenzylesterase; such a preparation typically has little or no detectable activity(ies) of such other enzyme(s).
- a food product/precursor herein can be brought into contact, in step (b), with one or more GTF enzymes and/or or one or more second enzymes that use sucrose herein by mixing/stirring/blending, for example.
- Incubation of GTF enzyme(s) and/or second enzyme(s) in the food product/precursor can be for a time sufficient for the GTF(s) to produce alpha-glucan in the food product/precursor, such as for about, or at least about, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 18, 24, 30, 36, 42, 48, 72, 96, 0.5-3, 0.5- 2.5, 0.5-2, 0.5-1.5, 1-3, 1-2.5, 1-2, 1-1.5, 1.5-3, or 1.5-2 hours, or for about, or at least about, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, or 60 days (or a range between any two of these hours and/or days).
- the temperature for incubating one or more GTF and/or second enzymes in a food product/precursor herein can be about 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 25, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 2-5, 2-10, 2-15, 2-20, 2-25, 2-30, 2-35, 2-40, 2-45, 2-50, 3-5, 3-10, 3-15, 3-20, 3-25, 3-30, 3- 35, 3-40, 3-45, 3-50, 5-10, 5-15, 5-20, 5-25, 5-30, 5-35, 5-40, 5-45, 5-50, 15-20, 15-25, 15-30, 15-35, 15-40, 15-45, 15-50, 20-25, 20-30, 20-35, 20-40, 20-45, 20-50, 25-30, 25- 35, 25-40, 25-45, 25-50, 30-35, 30-40, 30-45, or 30-50 °C, for example.
- a food product/precursor brought into contact with a GTF enzyme and/or second enzyme herein contains water (i.e., it is an aqueous composition), and/or water is introduced to the food product/precursor before or during contacting with one or more of these enzymes.
- GTF and/or second enzyme(s) can be added to a food product/precursor in dry form (e.g., powder, flakes, lyophilized enzyme preparation) (typically to an aqueous food product/precursor) or wet form.
- a food product/precursor can be combined with a GTF and/or second enzyme(s) under dry conditions (resulting combination is dry), after which time water or an aqueous solution is added, which in turn allows GTF production of alpha-glucan to proceed.
- steps (a) and (b) can optionally be considered to be performed simultaneously or separately.
- the water content of a food product/precursor as provided in step (a), or in step (b) following addition of GTF and/or second enzyme(s) can be about, or at least about, 10, 20, 30, 40, 50, 60, 70, 80, 90, 95, or 99 wt%, for example.
- the pH of a food product/precursor herein, and/or the pH for incubating one or more GTF and/or second enzymes in a food product/precursor herein can be about 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 4.0-10.0, 4.0-9.0, 4.0-8.0, 4.5-10.0, 4.5- 9.0, 4.5-8.0, 5.0-10.0, 5.0-9.0, 5.0-8.0, 5.5-10.0, 5.5-9.0, 5.5-8.0, 6.0-10.0, 6.0-9.0, or 6.0-8.0, for example.
- a food product/precursor in some aspects can be acidic (e.g., pH ⁇ 3.0, 3.2, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, or 6.5), neutral (e.g., pH 6.5-7.5), or basic/alkaline (e.g., pH > 7.5, 8.0, 8.5, 9.0, 9.5).
- acidic e.g., pH ⁇ 3.0, 3.2, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, or 6.5
- neutral e.g., pH 6.5-7.5
- basic/alkaline e.g., pH > 7.5, 8.0, 8.5, 9.0, 9.5
- a GTF enzyme and/or second enzyme herein can optionally be provided in step (b) of a method by introducing a recombinantly engineered cell (e.g., a microbial cell such as a bacterial or fungal/yeast cell) to the food product/precursor provided in step (a), wherein the cell recombinantly (heterologously) expresses and secretes the GTF enzyme and/or second enzyme in and/or around the food product/precursor.
- a recombinantly engineered cell e.g., a microbial cell such as a bacterial or fungal/yeast cell
- a recombinantly engineered cell that is provided to the food product/precursor in step (a) can be inactive and/or non-viable in some manner, such as by having been killed (but preferably in a manner that otherwise retains cellular shape/structure).
- a cell can be rendered inactive and/or non-viable by being irradiated or being treated with a sterilizing agent/chemical (e.g., ethylene oxide).
- the means for cell inactivation and/or killing preserves at least some of the three-dimensional shape/structure of the cell, and/or ensures that a GTF and/or second enzyme(s) that had been expressed by the cell remain active and typically remain associated with the inactive/non-viable cell (e.g., such as by being associated with a cellular membrane via an optional transmembrane domain or membrane-binding domain of the GTF and/or second enzyme [e.g., fused to the GTF and/or second enzyme]).
- An inactive/non-viable cell typically is porous, and optionally can be immobilized on a support (e.g., an inert, water-insoluble material, such as of a particle or surface).
- a food product/precursor as provided in step (a) of a method herein has, aside from the sucrose, little (e.g., less than 0.5, 0.25, 0.1, 0.05, 0.025, or 0.01 wt%, or not detectable) or no disaccharides and/or oligosaccharides (or little or no particular disaccharide or oligosaccharide).
- a food product/precursor as produced in step (b) of a method herein can likewise have, for example, little of no disaccharides and/or oligosaccharides (or little or no particular disaccharide or oligosaccharide), and also have little (e.g., as above) or no sucrose.
- a disaccharide or oligosaccharide in such aspects can be any as disclosed herein (e.g., lactose, maltose, isomaltose, MOS, IMO, GOS).
- One or more glycosidase enzymes can be used, for example, in a food product/precursor to reduce or eliminate the presence of disaccharide(s) and/or oligosaccharide(s), and can be added, for example, in the same or similar manner in which a GTF and/or second enzyme herein is added (e.g., time, temperature, pH), and can be added before, during, or after the addition of GTF and/or second enzyme.
- a glycosidase herein can be, for example, a beta-galactosidase (EC 3.2.1.23; e.g., lactase [EC 3.2.1.108]) or alpha-glucosidase (EC 3.2.1.20).
- Suitable beta-galactosidases herein include Bonlacta TM lactase (IFF) and lactases disclosed in U.S. Patent No.10531672, which is incorporated herein by reference.
- a lactase herein is a type of beta-galactosidase enzyme that catalyzes hydrolysis of lactose to glucose and galactose.
- Suitable alpha-glucosidases herein include those disclosed in U.S.
- an alpha-glucosidase that is used in the disclosed method is able to hydrolyze an alpha-1,4 or alpha-1,6 glucosidic linkage, or and/or is unable to hydrolyze an alpha-1,3 glucosidic linkage.
- An invertase in some aspects can be (derivable from) a bacterial, fungal (yeast), plant, or mammalian invertase, for example.
- An invertase can be (derivable from) a microbial invertase in some aspects.
- An invertase in some aspects can be from (derivable from) a species of Aspergillus (e.g., A. niger, A. aculeatus, A. oryzae, A. fumigatus), Fusarium (e.g., F. graminearum, F. oxysporum), Kluveromyces (e.g., K. lactis), Penicillium (e.g., P.
- chrysogenum P. hirsutum, P. italicum
- Saccharomyces e.g., S. cerevisiae
- Talaromyces e.g., T. minoluteus
- Thielavia e.g., T. terrestris
- suitable invertases can be as disclosed in any of U.S. Patent No.6337201, U.S. Patent Appl. Publ. Nos.2012/0122192, 20180007918 and 2022/0073893, Int. Patent Appl. Publ. No. WO2022243311, and GENBANK Accession Nos. CAB95010, NP_012104 and CAA06839, all of which are incorporated herein by reference.
- An invertase in some aspects can comprise, or consist of, an amino acid sequence that is about 100% identical to, or at least about 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 98.5%, 99%, or 99.5% identical to, SEQ ID NO:14 or an invertase amino acid sequence disclosed in any of the foregoing incorporated references, and have invertase activity.
- a second enzyme herein such as an invertase optionally can be produced and/or have any modifications (e.g., be in a mature form [e.g., secreted form], and/or contain heterologous amino acid residues at its N- and/or C- termini) as disclosed herein for a GTF enzyme and/or as disclosed in any of the foregoing incorporated references.
- One, two, three or more second enzymes can be used in a method of the disclosure, for example.
- two or more second enzymes are of the same enzyme type (e.g., two or more different invertases); however, two or more different types of second enzymes can optionally be used (e.g., at least one invertase and at least one fructosyltransferase).
- the concentration of one or more second enzymes (e.g., of active second enzyme[s]) in a food product/precursor can be about, or at least about, 5, 10, 15, 20, 25, 50, 60, 70, 75, 80, 90, 100, 125, 150, 175, 200, 225, 250, 275, 300, 400, 500, 600, 700, 800, 900, 1000, 5-1000, 5-500, 5-300, 5-200, 5-100, 5-80, 5-50, 20-1000, 20-500, 20-300, 20-200, 20-100, 20-80, 20-50, 50- 1000, 50-500, 50-300, 50-200, 50-100, 50-80, 100-1000, 100-500, 100-300, or 100-200 ppm (parts-per-million).
- the GTF (active GTF) concentration in a food product/precursor can be about, or at least about, 0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.5, 1.0, 0.01-1.0, 0.01-0.5, 0.01-0.25, 0.01-0.1, 0.05-1.0, 0.05-0.5, 0.05-0.25, 0.05-0.1, 0.1-1.0, 0.1-0.5, or 0.1-0.25 wt%.
- Conditions e.g., time, temperature, pH, addition order, mixing/contacting milieu, mixing order
- for treating a food product/precursor with a second enzyme typically can be as disclosed herein for a GTF enzyme.
- a second enzyme typically can be added to a food product/precursor at about the same time that a GTF is added to the food product/precursor; however, in some aspects, a second enzyme can be added before (e.g., 1, 2.5, 5, 10, 15, 20, or 30 minutes before) GTF addition, or after (e.g., 1, 2.5, 5, 10, 15, 20, or 30 minutes after) GTF addition.
- a food product/precursor in some aspects can be a dairy product/precursor, such as a dairy beverage or food. Suitable examples of a dairy product/precursor herein include milk, cheese, yogurt, dessert, cream, and butter.
- Milk herein can be whole milk (e.g., ⁇ 3% fat), ⁇ 2% fat milk, ⁇ 1% fat milk (“low-fat”), or fat-free (non-fat) milk, for example.
- Milk, whether used directly as a beverage or as a precursor for preparing a dairy product/precursor herein, can be from a cow, goat, sheep, buffalo, yak, llama, camel, or horse, for example. Milk can optionally be pasteurized before, or after, contacting it with one or more GTF and second enzymes herein.
- a cheese herein can be, for example, hard or semi-hard cheese (e.g., cheddar, mozzarella, Swiss, parmesan, provolone), soft or semi-soft cheese (e.g., ricotta, cottage cheese, feta, American, brie), processed, or non-processed.
- a yogurt herein can be, for example, whole milk yogurt, low-fat yogurt, fat-free yogurt, or Greek yogurt (e.g., plain, low-fat, non-fat).
- a yogurt herein can optionally contain fruit and/or be flavored.
- a yogurt herein can optionally be drinkable (i.e., yogurt beverage).
- a dairy dessert in some aspects can be a pudding (e.g., whole milk, 2% milk), frozen yogurt (e.g., low-fat), ice cream (e.g., low-fat), sherbet, milk shake, gelato, or custard; thus, in some aspects a dairy dessert can be a frozen dairy dessert (e.g., ice cream, sherbet, milk shake, frozen yogurt, gelato). Ice cream can be hard ice cream or soft (soft-serve) ice cream, for example.
- a dairy beverage in some aspects can be milk, chocolate milk, coffee milk, flavored milk, yogurt beverage, kumis, ryazhenka, ayran, lassi, cholado, licuado, or kefir.
- a dairy cream can be clotted cream (e.g., ⁇ 55% milkfat), heavy cream (e.g., ⁇ 36% milkfat), whipping cream (e.g., 30%-36% milkfat), light cream (e.g., 18%-30% milkfat), sour cream ( ⁇ 18% milkfat), half-and-half (e.g., 10.5%-18% milkfat), or ice cream (e.g., ⁇ 10% milkfat).
- a dairy product/precursor herein can be lactose-free or have a reduced lactose content, for example.
- a dairy product/precursor herein can be a fermented dairy product/precursor (e.g., yogurt, buttermilk, creme fraiche, quark, fromage frais, soured milk, vinegar), for example.
- Some dairy products/precursors herein include dairy confections such as milk chocolate, white chocolate, caramel, and toffee.
- a dairy product/precursor in some aspects can be any as disclosed in WO2020/010176, U.S. Patent Appl. Publ. Nos. 2013/0230623, 2005/0244541, 2017/0135360, 2009/0304864, 2017/0094987, or 2003/0152685, or U.S. Patent Nos.5482728 or 6352734, all of which are incorporated herein by reference.
- a food product/precursor in some aspects can be a flour-based or meal-based dough, baked product (bakery product), or extruded product, such as any of those disclosed in WO2021/034561 or U.S. Patent Appl. Publ. Nos.2017/0218093 or 2022/0322685, which are incorporated herein by reference.
- Examples of baked products, or a dough (precursor) thereof include bread (e.g., buns, sourdough, rye, whole wheat, pita, flatbread, tortilla, cornbread, brioche, white, baguette, bagels, banana, ciabatta, brown, challah, focaccia, multigrain, bread sticks, soda bread, pumpernickel, potato bread, biscuits, English muffins, whole grain, matzo, lavash, croutons, pizza crust) (leavened or unleavened), cake (e.g., carrot cake, red velvet, angle food, pound cake, chocolate, white, black forest, tiramisu, coffee cake, cheesecake, devil’s food, upside-down cake, Boston cream pie, Swiss roll, lemon cake, short cake, chiffon cake, butter cake, spice cake, rum cake, sponge cake, marble cake, coconut cake, pandan cake), muffins, brownies, scones, cookies, bars, custards, pies, crackers,
- extruded product examples include pasta (e.g., spaghetti, rotini, fusilli, penne, strictlyni, macaroni/maccheroni, rigatoni, fettuccine, linguine, vermicelli, ziti, farfalle, gomiti/elbow, rotelle), cereal (e.g., direct expanded cereal, filled cereal, flakes, breakfast cereal), some bread products (e.g., croutons, bread sticks, flat breads), pre-made cookie-dough, dry and semi-moist pet food (e.g., kibbles), and snacks (e.g., cheese curls, filled pillow puffs, chips [e.g., corn chips, pita chips, processed potato chips, tortilla chips], snack sticks [e.g., vegetable sticks], puffed shaped products such as curls [e.g., cheese curls], balls, tubes, bananas, cups, bowls, disks, baby food puffs).
- pasta e.g., spaghetti, rotin
- Pasta herein can be extruded (e.g., see above) and/or flattened/rolled (e.g., lasagna), fresh or dried, long or short, minute/soup pasta (pastina), filled (e.g., tortellini, ravioli, agnolotti, tortelli), stretched (e.g., cencioni, corzetti, foglie d’ulivo, orecchiette), and/or egg pasta, for example.
- a food product/precursor in some aspects can be a syrup or beverage, for example, such as any of those disclosed in U.S. Patent Appl. Publ.
- a beverage in some aspects can be a juice (e.g., fruit juice such as orange juice, apple juice, mango juice, peach juice, banana juice, date juice, apricot juice, grapefruit juice, papaya juice, pineapple juice, raspberry juice, strawberry juice, pear juice, tangerine juice, or cherry juice; vegetable juice such as carrot juice, tomato juice, or mixed- vegetable juice), sweetened beverage (soda/soft drink, sweetened tea of coffee), ready- to-drink (RTD), or any other beverage having natural and/or added sugar (sucrose).
- fruit juice such as orange juice, apple juice, mango juice, peach juice, banana juice, date juice, apricot juice, grapefruit juice, papaya juice, pineapple juice, raspberry juice, strawberry juice, pear juice, tangerine juice, or cherry juice
- vegetable juice such as carrot juice, tomato juice, or mixed- vegetable juice
- sweetened beverage saca/soft drink, sweetened tea of coffee
- RTD ready- to-drink
- a food product/precursor in some aspects can be a condiment (table condiment) or any other preparation (of liquid consistency or solid consistency) that is added to a food (typically cooked food) to impart a flavor and/or to enhance a flavor.
- condiments herein include/comprise any tomato-based condiment (e.g., ketchup, tomato sauce, salsa, marinara sauce), mustard (e.g., yellow mustard, Dijon mustard), relish, horseradish, wasabi, hot sauce, chili sauce/oil, mayonnaise, aioli, barbecue sauce, soy sauce, alfredo sauce, au jus, Béarnaise sauce, cranberry sauce, chutney (mango chutney, onion chutney, tamarind chutney), cocktail sauce, fish sauce, oyster sauce, hoisin sauce, sriracha sauce, marmalade, fruit preserves (jam/jelly), Hollandaise sauce, hummus, guacamole, pesto sauce, miso, Worcestershire sauce
- a ketchup typically comprises at least tomatoes (e.g., puréed, or otherwise disintegrated form such as paste, before or after addition to one or more other ketchup ingredients), water, sugar/sweetener and vinegar (e.g., distilled vinegar), and optionally further comprises salt (e.g., NaCl) and/or seasonings/spices (e.g., onion powder, garlic powder, mustard powder, cumin, allspice, coriander, cinnamon).
- a tomato ingredient for preparing a ketchup can be in the form of tomato paste, tomato sauce, or tomato purée, for example.
- a ketchup comprises about, or at least about, 30, 35, 40, 45, 50, 30-50, 30-45, 30-40, 30-35, 35-50, 35-45, or 35-40 wt% tomato paste, tomato concentrate, or other type of tomato solids (typically comprising some amount of water, i.e., typically not dry solids) form/ingredient.
- a ketchup comprises about, or at least about, 20, 25, 30, 35, 40, 45, 50, 55, 60, 20-60, 20- 50, 20-40, 20-30, 30-60, 30-50, or 30-40 wt% of water used as an initial ingredient itself (i.e., the foregoing amount of water does not include water introduced by other ingredients such as tomato paste).
- a ketchup typically is prepared by cooking the tomato ingredient(s) (optionally along with one or more other ingredients) and blending them together to form a sauce or other liquid consistency form.
- An example of a ketchup herein comprises tomato concentrate (e.g., from red ripe tomatoes), vinegar, high fructose corn syrup (this ingredient is optional), corn syrup, salt, spice, onion powder, and natural flavoring.
- ketchup herein have a formulation (and methodological setup) as described for Table 14 (formulation 5, 6, or 7), Table 16 (formulation 3, 5, 6, 7, or 8), Table 18 (formulation 4, 5, or 6), or Table 21 (formulation 2 or 3) below, where the amount/content of each ingredient, and/or the setup parameters (incubation time and temperature), is/are within 5% or 10% of the respective values listed for a respective formulation.
- Table 14 formulation 5, 6, or 7
- Table 16 formulation 3, 5, 6, 7, or 8
- Table 18 formulation 4, 5, or 6
- Table 21 formulation 2 or 3
- a ketchup comprises a vegetable or fruit ingredient (e.g., banana, guava, tamarind, mushroom, or any fruit/vegetable disclosed herein) instead of (or in addition to) a tomato ingredient.
- a food product/precursor in some aspects can be a fermented food product/precursor, for example, such as any of those disclosed in WO2002/034061.
- a food product/precursor provided in step (a) of a method herein is fermented, while in some aspects a food product/precursor is fermented (or further fermented) during or after performing step (b).
- Suitable bacteria for food fermentation in some aspects can be species from the Bifidobacterium genus (e.g., B. bifidum, B. longum, B. animalis, B. breve, B. infantis) or Propionibacterium genus (e.g., P. freudenreichii such as subsp. P.
- Bifidobacterium genus e.g., B. bifidum, B. longum, B. animalis, B. breve, B. infantis
- Propionibacterium genus e.g., P. freudenreichii such as subsp. P.
- a bacteria herein can optionally be mesophilic (temperature for optimal growth typically at 20 to 25 °C [room temperature]).
- a mix of bacteria in a culture for food fermentation can comprise one, two, three, four, five, six or more different species and/or sub-species of bacteria, for example.
- Suitable yeast for food fermentation in some aspects include species from the Saccharomyces genus (e.g., S. cerevisiae, S. pastorianus, S. boulardii, S. kluyveri), Pichia genus (e.g., P. kluyveri, P. fermentans), and Candida genus (e.g., C. humilis, C. famata).
- a yeast in some aspects can be characterized as baker’s (baking) yeast, brewing yeast, wine-making yeast, probiotic yeast, budding/fission yeast, or GRAS.
- a mix of yeast in a culture for food fermentation can comprise one, two, three, four, five, six or more different species and/or sub-species of yeast, for example.
- a food product/precursor that is fermented or will be fermented can be a dairy product herein (e.g., as above, such as yogurt), beer, beer wort, wine, pomace, cider, miso, kimchi, sauerkraut, pickles/pickle juice, soybean curd, tofu, kombucha, soy sauce, bread, sourdough, or meat, for example.
- a food product/precursor in some aspects can be a confectionary, for instance.
- confectioneries herein include boiled sugars (hard boiled candies [i.e., hard candy]), dragees, jelly candies, gums, licorice, chews, caramels, toffee, fudge, chewing gums, bubble gums, nougat, chewy pastes, halawa, tablets, lozenges, icing, frosting, pudding, gels (e.g., fruit gels, gelatin dessert), aerated confectioneries, marshmallows, baked confectioneries.
- a food product/precursor in some aspects can be a non-dairy food product/precursor.
- a non-dairy food product/precursor can be a plant- based milk (milk substitute) or comprise a plant-based milk (and lack, or have little of [e.g., ⁇ 0.5 wt%], any dairy ingredient[s] such as lactose, whey, casein, and/or milk fat).
- a non-dairy food product/precursor is fermented (e.g., a non-dairy yogurt product/precursor such as a plant-based yogurt product/precursor).
- Plant-based ingredient(s) forming the basis for a non-dairy food product/precursor herein can be from nuts/seeds (e.g., almonds, cashews, macadamias, hemp seed, quinoa, flax seed), grains/cereal (e.g., oats, rice), fruit (e.g., coconut, banana), or vegetables (e.g., legumes such as beans [e.g., soybeans, mug beans] and peas), for example.
- nuts/seeds e.g., almonds, cashews, macadamias, hemp seed, quinoa, flax seed
- grains/cereal e.g., oats, rice
- fruit e.g., coconut, banana
- vegetables e.g., legumes such as beans [e.g., soybeans, mug beans] and peas
- a non-dairy food product/precursor is a milk of any of the foregoing nuts/seeds, grains/cereal, fruit, or vegetables; a fermented form of any of these milks can be a yogurt, for example.
- a food product/precursor in some aspects can be a cream soup, gravy, sauce (e.g., tomato sauce), salad dressing, mayonnaise, jam, jelly, marmalade, syrup, pie filling, batter for fried foods, batter for pancakes/waffles, cake icing and glazes, whipped topping, pet food, or animal/livestock feed.
- the sweetness of a food product/precursor after step (b) can be reduced by about, or at least about, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, or 50%, as compared to the sweetness of the food product/precursor as it existed before step (b).
- the sweetness reduction typically is not as pronounced (i.e., not as much sweetness reduction) as it would have been if the carbohydrate-containing ingredient(s) was omitted (i.e., the carbohydrate-containing ingredient dampens sweetness reduction).
- step (a) comprises adding sucrose to the food product/precursor.
- step (a) comprises adding sucrose to the food product/precursor.
- step (a) comprises adding sucrose to the food product/precursor.
- step (a) comprises adding sucrose to the food product/precursor.
- step (a) comprises adding sucrose to the food product/precursor.
- step (a) comprises adding sucrose to the food product/precursor.
- step (b) comprises adding sucrose to the food product/precursor.
- step (b) comprises adding sucrose to the food product/precursor.
- step (b) further comprises contacting the food product/precursor with at least one isolated lactase enzyme.
- An isolated composition/product (e.g., household care product, personal care product, industrial product, ingestible product, or pharmaceutical product; or household care product, personal care product, or industrial product,) comprising (I) an isolated invertase (e.g., according to embodiment 2) or isolated second enzyme of the present disclosure that utilizes sucrose as a substrate, and (II) at least one of an (i) isolated glucosyltransferase enzyme that synthesizes alpha-1,6-glucan (e.g., according to embodiment 3) and/or (ii) isolated glucosyltransferase enzyme that synthesizes alpha- 1,3-glucan (e.g., according to embodiment 4), and that optionally further comprises at least one alpha-glucan and/or an isolated lactase enzyme.
- an isolated invertase e.g., according to embodiment 2 or isolated second enzyme of the present disclosure that utilizes sucrose as a substrate
- an isolated glucosyltransferase enzyme that synth
- compositions and methods/processes disclosed herein include: 1a.
- a method (process) of producing a food product/precursor comprising: (a) providing a food product/precursor that comprises at least water, sucrose and at least one carbohydrate-containing ingredient (optionally, the sucrose is contained within the carbohydrate-containing ingredient, which has one or more other carbohydrates in addition to sucrose; regardless of the source of the sucrose in step [a], the carbohydrate-containing ingredient has one or more other carbohydrates such as disclosed herein), and (b) contacting the food product/precursor with at least one glucosyltransferase enzyme, wherein the glucosyltransferase enzyme is: (i) a glucosyltransferase enzyme that synthesizes alpha-1,6-glucan, wherein at least about 50% of the glycosidic linkages of the alpha-1,6-glucan are alpha-1,6 linkages, and/or (ii) a glucosyltransfer
- glucosyltransferase enzyme that synthesizes alpha-1,6-glucan comprises an amino acid sequence that is at least 90% identical to SEQ ID NO:1, 2, 11 or 12. 4a.
- the method of embodiment 1a, 2a, or 3a, wherein the glucosyltransferase enzyme that synthesizes alpha-1,3-glucan comprises an amino acid sequence that is at least 90% identical to residues 55-960 of SEQ ID NO:5, residues 54-957 of SEQ ID NO:6, residues 55-960 of SEQ ID NO:7, residues 55-960 of SEQ ID NO:8, residues 55- 960 of SEQ ID NO:9, or SEQ ID NO:13. 5a.
- step (a) comprises adding sucrose to the food product/precursor.
- step (a) comprises adding sucrose to the food product/precursor.
- 8a The method of embodiment 1a, 2a, 3a, 4a, 5a, 6a, or 7a, wherein the food product/precursor is a dairy food product/precursor.
- 9a The method of embodiment 1a, 2a, 3a, 4a, 5a, 6a, or 7a, wherein the food product/precursor is a non-dairy food product/precursor.
- 10a The method of embodiment 9a, wherein the non-dairy food product/precursor is plant-based. 11a.
- step (b) further comprises contacting the food product/precursor with at least one isolated lactase enzyme.
- a tomato-based ingredient e.g., tomato paste, tomato concentrate, tomato purée, or tomato sauce.
- 16a The method of embodiment 1a, 2a, 3a, 4a, 5a, 6a, 7a, 8a, 9a, 10a, 11a, 12a, 13a, 14a, or 15a, wherein the carbohydrate-containing ingredient comprises syrup (e.g., corn syrup or high fructose corn syrup). 17a.
- 20a The method of embodiment 1a, 2a, 3a, 4a, 5a, 6a, 7a, 8a, 9a, 10a, 11a, 12a, 13a, 14a, 15a, 16a, 17a, 18a, or 19a, further comprising homogenizing the food product/precursor after step (b).
- 21a A food product or food precursor (isolated food product/precursor) produced by the method of embodiment 1a, 2a, 3a, 4a, 5a, 6a, 7a, 8a, 9a, 10a, 11a, 12a, 13a, 14a, 15a, 16a, 17a, 18a, 19a, or 20a. 22a.
- An isolated food product or food precursor comprising at least one of an (i) isolated glucosyltransferase enzyme that synthesizes alpha-1,6-glucan (e.g., according to embodiment 3a) and/or (ii) isolated glucosyltransferase enzyme that synthesizes alpha-1,3-glucan (e.g., according to embodiment 4a), and that optionally further comprises at least one alpha-glucan, and the isolated food product or food precursor can be any as presently disclosed, such as those recited in any one of embodiments 8a, 9a, 10a, 11a, 12a, or 13a).
- EXAMPLES The present disclosure is further exemplified in the following Examples.
- Yogurt preparation Pre-pasteurized (72 °C for 15 s) bulk-blended skimmed milk (0.1% fat) (Arla Foods, Denmark) stored at 4-6 °C was standardized to a desired protein (%w/w), fat (%w/w) and sucrose (%w/w) content by addition of skimmed milk powder (33% protein, 1.2% fat, 54% carbohydrate) from BBA Lactalis (Laval, Mayenne, France), cream (38% fat) from Arla Foods, and sucrose (Granulated Sugar 500, Nordic Sugar A/S, Denmark). The thus prepared standardized milk was then pasteurized and homogenized in a plate heat exchange pasteurizer.
- a block of pre-weight ice cream (60-70 g) was put on a net (mash size of 0.5 cm x 0.5 cm) at 20 °C.
- the net with the ice cream was placed above a scale with a beaker.
- liquid in the beaker was weighed every 10 seconds. Melt-down was defined as the percentile of the liquid in the beaker at a given timepoint, divided by the initial weight of the ice cream on the net at the start of the measurement.
- Ice cream texture was analyzed according to Parvar et al. (2013, Food Biosci. 3:10-18, incorporated herein by reference), with minor modification. Analysis was performed using a TA.XTPLUS Texture Analyzer equipped with a P/10 cylindric measurement probe (Stable Micro System, Surrey, United Kingdom). An ice cream block (0.24 L; 10.4 cm x 5.4 cm x4.4 cm) was penetrated with the texture analyzer at a speed of 2 mm s ⁇ 1 to a depth of 15 mm.
- the probe was retracted from the ice cream at a speed of 2 mm s ⁇ 1 .
- the block was measured at three spots (center, 1.5 cm left of center, 1.5 cm right of center).
- the hardness and cohesiveness of ice cream were defined as, respectively, the maximal force needed to penetrate (maximal positive force) or extract (maximal negative force) the probe from the ice cream sample.
- the adhesiveness of ice cream was defined as the negative area when plotting the force over the analysis time. All analyses were performed at a constant ice cream temperature (15 C ⁇ 2 °C). Since each analysis took less than a minute, no external sample cooling was needed.
- the flow rate was 0.3 mL/min and the gradient was (%A/min): 10/0, 35/20, 50/20.5, 21/50, 10/21.5, or 10/25.
- Steviol glycosides were detected using a diode array detector at 200 nm.
- Standards of stevioside, rebaudioside A, rebaudioside B, rebaudioside C, rebaudioside D, rebaudioside E, rebaudioside F, rebaudioside M, rebaudioside N, rubusoside and dulcoside A were dissolved in methanol (approx.1 mg/mL) and diluted with water to be used as retention time standards.
- GTF glucosyltransferase 0768 (SEQ ID NO:1, also represented by SEQ ID NOs:2, 11 and 12) and an amino acid-substituted GTF 6855 variant (SEQ ID NO:3, “vGTFJ” herein) alone, or in combination, was investigated in a yogurt production set-up (scale: 60 g). Both these GTF enzymes use sucrose as a substrate to produce fructose and glucan (i.e., they are glucansucrases).
- GTF 0768 (a dextransucrase) produces a soluble alpha-glucan with a high alpha-1,6 linkage content (i.e., a type of dextran; refer to U.S. Patent Appl. Publ. No.20160122445, which is incorporated herein by reference), whereas vGTFJ stably produces at high yield an insoluble alpha-glucan having about 100% alpha-1,3 linkages (the variant GTF of SEQ ID NO:4 similarly can be used herein to stably produce at high yield insoluble alpha-glucan having about 100% alpha-1,3 linkages).
- the apparent viscosity of the 90:10 % (GTF 0768 : vGTFJ) samples at both 11.7 Hz and 249 Hz exceeded the apparent viscosity obtained when using vGTFJ alone; this was especially the case for the perception of mouthfeel at shear rate 249 Hz (FIG.3).
- the 90:10 % (GTF 0768 : vGTFJ) addition had a significant impact on texture and it was the only GTF-treated sample to exceed the apparent viscosity obtained when using 3% starch (FIGs.2 and 3).
- the texture of the yogurt product could be tailored by merely adjusting the dose relation of GTF 0768 and vGTFJ.
- Fresh milk was standardized to 4.0% (w/w) protein, 1.0% (w/w) fat, 8.0 % (w/w) sucrose and 3% starch for the reference samples, which were homogenized and pasteurized as described in the Materials/Methods.
- GTF enzymes were added at the dosage level shown in Table 2, where 100% GTF 0768 or vGTFJ was the amount of enzyme sample needed to fully convert the sucrose within the time of fermentation.
- YO-MIX 863, YO-MIX PRIME 900, YO-MIX M01 and YO-MIX T42 were used as starter cultures (available from IFF).
- Example 4 Texturizing Effect and Sugar Reduction in Various Neutral Substrates Using Glucosyltransferase Enzymes in situ
- the texturizing effect of GTF 0768 (SEQ ID NO:1), GTF 0974 (SEQ ID NO:13), and a variant of S. salivarius GTF 6855 (“v2GTFJ”) in various milk preparations and buffered substrates was investigated.
- GTF 0974 (U.S. Pat. Appl. Publ. No.2018/0291311, incorporated herein by reference) represents an S. salivarius glucosyltransferase-SI enzyme that produces alpha-1,3-glucan with about 93% alpha-1,3 linkages and about 7% alpha-1,6 linkages.
- FIG. 11 The absolute sugar content in each preparation is presented in FIG. 11, and the percent total sugar reduction relative to each respective reference preparation (as initially prepared – no GTF added, and prior to incubations with other enzymes per Table 4) is presented in FIG.12.
- FIG.12 also shows the relative oligosaccharide (DP3+) and polysaccharide content of each preparation.
- the resulting apparent viscosities at shear rates of 11.7 Hz and 249 Hz are presented in FIGs.13 and 14, respectively. Table 4.
- substrate E prior to GTF treatment, contained IMO by virtue of having been treated with the FoodPro ® TGO enzyme, which is a transglucosidase that converts maltose into IMO (mostly DP3-DP5) (mainly by transferring glucose from maltose to another maltose or already-extended maltose).
- the FoodPro ® TGO enzyme which is a transglucosidase that converts maltose into IMO (mostly DP3-DP5) (mainly by transferring glucose from maltose to another maltose or already-extended maltose).
- GTF 0974 caused higher polysaccharide formation in substrates A-C
- GTF 0768 and v2GTFJ caused higher oligosaccharide formation in substrates D-E (FIG.12).
- GTF 0768 or v2GTFJ resulted in increases of apparent viscosity at both shear rates of 11.7 Hz and 249 Hz in substrate A- C (FIGs.13-14).
- GTF 0768 had the highest impact on apparent viscosity at the 249 Hz shear rate, which was most probably due to the fact that it produces soluble polysaccharide.
- FIGs.15A and 15B show the percent total sugar reduction relative to the reference preparation.
- FIGs. 15A-B also show the relative oligosaccharide (DP3+) and polysaccharide content of each preparation.
- the resulting apparent viscosities at shear rates of 11.7 Hz and 249 Hz are presented in FIGs.16 and 17, respectively. Table 5.
- texture could be tailored by adjusting the blend ratio of GTF 0768 and vGTFJ in the neutral beverage without maltose.
- the use of GTF 0768 alone also increased texture; however, the polysaccharides formed were perceived to be very sticky/ropy, which typically would not be preferred for a smooth drinkable beverage. Consistent with the results of Example 4, it was generally possible, with GTF treatment, to obtain a higher percent sugar reduction in neutral beverages having maltose (as compared to neutral beverages not having maltose) without significantly altering the texture, which is due to a higher preference for oligosaccharides formation (compare FIGs.15A and 15B).
- Yogurt stabilized with starch was used as a reference, and was made with 6% sucrose, 30% coconut cream (iTi Tropicals, Lawrence Township, New Jersey, USA), 6% tapioca starch, and 58% water.
- the experimental yogurt base contained 6% sucrose, 30% coconut cream, and 64% tap water.
- each of the two bases were blended under high agitation before pasteurization, which was performed by high-temperature short-time pasteurization at 195 °F (90.56 °C) for 30 seconds. Homogenization was downstream from the heating step at a total pressure of 3000 psi in a two-stage homogenizer. After homogenization, each mixture was cooled to 110 °F (43.3 °C), after which fermentation was done with Danisco® VEGE 022 culture. Fermentation was considered complete when the yogurt pH reached 4.65 or lower.
- Yogurt pH Sample ID Day 1 Day 21 Day 35 Day 65 Reference (6% starch) 448 450 449 446 Yogurt s ugar composition was also measured throughout this time period at days 0, 14, 28, 42 and 56 by HPLC (Materials/Methods).
- the % (w/w) total sugar of each sample is presented in FIG.19.
- the control yogurt without added GTF enzyme or starch had low viscosity throughout its shelf life (FIG.18).
- the reference yogurt with starch and both experimental yogurts with added GTF enzyme(s) had high viscosity. All the yogurts had a similar pH, from production to throughout the shelf life. In the samples containing added GTF enzyme(s), sugar was reduced by approximately 40%, which was consistent throughout the shelf life tested.
- Example 7 Improved Physical Properties of Ice Cream Produced Using Glucosyltransferase Enzymes in situ Ice creams were prepared according to Table 7 with or without various combinations of glucose syrup, hydrocolloid, 0.32% NURICA, 0.17% BONLACTA, GTF 0768 (SEQ ID NO:1) and vGTFJ (SEQ ID NO:3).
- the ice cream base for samples 2102- 3-(2-7) was prepared by mixing water, skimmed milk powder (9%), sucrose (12%), whey powder (2.5%) and emulsifier (0.35%, CREMODAN SUPER MB) at room temperature before adding refined coconut oil (4%, KRISTAL) and heating to 70 °C.
- the ice cream bases were then homogenized at 78 °C and pasteurized at 84 °C for 30 seconds. After cooling to 5 °C, the various enzymes were added per Table 7 during ice cream maturation, and the mixes were incubated 24 hours before freezing (light extrusion with 100% overrun) in a hardening operation at 30 °C.
- the individual enzyme dosages of GTF 0768 and vGTFJ were normalized at which 100 % dosage is the dosage necessary to provide full sucrose conversion during the 24 hours at 5 °C.
- a reference ice cream (2021-3-1) was also prepared further containing glucose syrup (4%) and hydrocolloid (0.2%, CREMODAN DC 100).
- the melting profile and texture attributes (hardness, cohesiveness, adhesiveness) of the ice cream samples were measured according to the Materials/Methods.
- Table 7 Sample ID Sample description 210231 h d ll id l Sam pes - -( - ) a a e ee - suga e uc o eative to sample 2102-3-2.
- all samples with enzyme addition that included the vGTFJ enzyme had an improved melting profile (slower melting) relative to the plain ice cream base (sample 2102-3-2) (FIG.20). This melting profile was at least on par, or better than, the melting profile of the reference sample containing hydrocolloid and glucose syrup (sample 2102-3-1).
- Example 8 Improved Physical Properties of Sweetened Condensed Milk Produced Using Glucosyltransferase Enzymes in situ
- the in situ effect of glucosyltransferase enzymes was investigated in a condensed milk application.
- the recipe of each condensed milk trial sample (trial nos.1-8) is displayed in Table 8.
- 800 g skim milk powder (Arla, Aarhus, Denmark)
- 1523 g sucrose Nordic Sugar, Copenhagen, Denmark)
- approximately 800 g water were blended at 50 °C until no lumps were visible. The mix was further stirred and cooled to 5 °C.
- GTF 0768 SEQ ID NO:1
- vGTFJ SEQ ID NO:3
- 100% GTF 0768 or vGTFJ was the amount of enzyme sample needed to fully convert the sucrose within the 24-hour, 5 °C incubation.
- Trial samples 1 and 2 acted as references/controls and contained no GTF enzyme, but were otherwise treated the same as trial samples 3-8.
- anhydrase milk fat (AMF, 315 g per trial, Coreman, Goé, Belgium) and an emulsifier (7 g of RECODAN TM RS 100, not included in trials 2 and 3) were melted together at 70 °C, after which 7 g lecithin (SOLEC SF-D, IFF, Copenhagen, Denmark) was added to the melts.
- SOLEC SF-D 7 g lecithin
- This device measures the dimensional change of, and the stresses acting on, a fluid bridge (filament) that forms between two plates during vertical separation of the plates.
- a constant vertical separation velocity of 1 mm/s was used. From the change of filament radius, a so-called Hencky strain is calculated.
- the degree of vertical separation that a filament can sustain (i.e., how “stringy” the sample is) in mm is numerically the same as the time the filament is stable, which follows from the use of a 1 mm/s separation velocity.
- FIG.22 shows Hencky strain vs. time for trial samples 1-8 (S1-S8); across all the samples, significant differences in strain values were observed at times greater than 5 seconds.
- the samples varied significantly in their stretchability, or “stringiness”, as can be seen by the increasing time a filament can be sustained under deformation.
- the samples can be ranked in terms of their stringiness/stretchability as follows: S5>S7>S8 ⁇ S6>S4>S3>S1>S2.
- Example 9 Controlled Texture Formation in Plant-Based Compositions Using Glucosyltransferase Enzymes in situ
- 102.6-g sample solutions (Samples 1-5) were prepared, each comprised of tap water and sucrose (40 wt%).
- the sample solutions were brought to 35 °C and a high texturizing blend of GTF 0768 (SEQ ID NO:1) and vGTFJ (SEQ ID NO:3) was added to four of the solutions (Samples 2-5) at time zero.
- strawberry purée (30 g) strawberry pieces (70 g) and sucrose (6.4 g) were added to Samples 2 (15 minutes), 3 (20 minutes), 4 (25 minutes), and 5 (30 minutes).
- skim milk base was prepared having 9 wt% skim milk powder (33% protein, 1.2% fat, 54% carbohydrate; BBA Lactalis, Laval, Mayenne, France) and 8 wt% sucrose (Granulated Sugar 500; Nordic Sugar A/S, Denmark) dissolved in tap water. This base was tempered to 40 °C.
- a yeast invertase (SEQ ID NO:14) was added to aliquots of the skim milk base at 5, 20, 80, or 200 ppm, either alone or in combination with vGTFJ (SEQ ID NO:3, added to 0.1 wt%). These aliquots were incubated at 40 °C; samples were removed from each aliquot after 10, 30, 60, 120, or 150 minutes of incubation and inactivated by heating at 95 °C for 5 minutes. A picture was taken of the resulting texture of each 150-minute sample (FIG.23), and the sugar/oligosaccharide composition of each sample was measured according to the Materials/Methods.
- This base was tempered to 43 °C.
- the skim milk base was inoculated with a thermophilic starter culture (YO-MIX PRIME 900) at an inoculation rate of 20 DCU/100 L.
- the above yeast invertase (SEQ ID NO:14) was added to individual aliquots of the culture-inoculated skim milk base at 50, 100, 200, or 300 ppm, either alone or in combination with vGTFJ (SEQ ID NO:3, added to 0.1 wt%). Fermentation of each aliquot was conducted until pH 4.60 was reached, after which the product was cooled to 4 °C. The aliquot products were stored at 4 °C overnight before being stirred.
- FIG.24 A picture was taken of the resulting texture of each aliquot product (FIG.24), and the sugar/oligosaccharide composition of each product was measured according to the Materials/Methods. As shown in FIG.24 (top row), a significant amount of texture was formed during the fermentation as a result of the vGTFJ conversion of sucrose to alpha-glucan, and this texture was reduced/adjusted by including invertase. This texture tempering effect of invertase was enzyme dose-dependent. Incubation of invertase alone in the samples, without addition of vGTFJ, did not result in any texture formation (FIG.24, bottom row). The sugar composition (monosaccharides and disaccharides) of each sample was analysed.
- Example 11 Glucosyltransferase Dosage Optimization Individual enzyme dosages of GTF 0768 (SEQ ID NO:1) and vGTFJ (SEQ ID NO:3) were normalized such that a 100% dosage was the dosage necessary for either GTF to provide full sucrose conversion during a 24-hour incubation at 5 °C. A blend of 10:90 % (GTF 0768 : vGTFJ) was prepared.
- the 10:90 % (GTF 0768 : vGTFJ) blend was added to each milk base that had been tempered at 5 °C with or without invertase (IFF, FoodPro ® I) and/or lactase (IFF, BONLACTA) according to Table 12.
- invertase was included, it was for replacing some of the 10:90 % (GTF 0768 : vGTFJ) blend to a point where full sucrose depletion should still be achieved within the incubation time.
- Example 12 Impact of Glucose Syrup on Glucan Formation During Condiment Production
- corn syrup glucose syrup
- any resulting texture provided by such alpha-glucan to the formulation were investigated. In doing so, the effects of varying glucose syrup concentration were tested.
- a second enzyme herein that utilizes sucrose as a substrate e.g., invertase was not used in this of the following Examples, though one could still apply such an additional enzyme, as desired or appropriate.
- the corn syrup used in this Example contained 17-21% dextrose, 11-16% maltose and 9-16% trisaccharides (e.g., maltotriose) on a dry weight basis, all of which saccharide components could possibly act as acceptor molecules by GTF enzymes and hence reduce the molecular weight of alpha-glucan produced in the ketchup formulation. Thus, different amounts of corn syrup were tested.
- the 10:90 % (GTF 0768 : vGTFJ) enzyme blend of Example 11 was used in preparing these formulations.
- Ketchup samples (1-9) were prepared in 15-g portions based on the ingredients/formulations displayed in Table 14. Table 14.
- Ketchup Formulations and Processing Regimes Formulation (each ingredient in wt%) 1 2 3 4 5 6 7 8 9 5 or preparng eac etc up sampe ( abe ), t e water and corn syrup ingredients were mixed before adding the enzyme blend.
- the dry materials (sugar, salt, preservatives, spices, and stabilizer) were blended and added to the wet phase while agitating. After incubation for 20 hours at 5 °C, the tomato paste and vinegar ingredients were added and mixed well into each sample. All the prepared samples were then heated to 90 °C for 10 minutes to gelatinize starch or to inactivate the GTF enzymes. Small aliquot samples were extracted and stored frozen until analyzed for carbohydrates by HPLC.
- the sugar syrup could be any corn syrup or high fructose corn syrup that contains acceptor molecules for glucosyltransferase. If such a syrup is not included in the recipe, then including an invertase in the incubation step would be relevant for texture modulation.
- Example 13 Order of Ingredient Addition and Impact of Homogenization For the following ketchup formulation trial, batch size was scaled up to 100 g. The ingredients are displayed in Table 16.
- GTF 0768 and vGTFJ were subject to incubation (20 hours at 5 °C) and GTF enzyme termination (90 °C for 10 minutes) steps.
- Two different blends of GTF 0768 and vGTFJ were tested, of which a 90:10% (GTF 0768: vGTFJ) blend was high-texturizing (trial 3, 5, 7 and 8) and a 60:40% (GTF 0768: vGTFJ) blend was less texturizing (trial 4 and 6).
- corn syrup levels impact texture As it was demonstrated that corn syrup levels impact texture (Example 12), it was decided to include 2.5 wt% corn syrup (trial 3, 4, 7, Table 16), or no corn syrup (trial 5, 6, 8, Table 16), during incubation with GTF enzymes, and then to add the balance of the corn syrup (to 20 wt%) after the GTF incubation.
- the resulting formulations were therefore expected to have similar sweetness as the references. It was also tested whether the presence of tomato paste during the GTF enzyme incubation could disrupt gelling and hence produce a smoother product (trial 7, 8, Table 16).
- Samples 3, 5, 6, 7 and 8 all had acceptable texture, though samples 3 and 7 were not as thick as reference sample 1, which was due to the presence of 2.5% corn syrup during GTF enzyme incubation. It was further found that if corn syrup was not included during enzyme incubation, then a smooth product could be obtained by either applying homogenization after production or to include tomato paste during GTF enzyme incubation.
- the results of the carbohydrate analysis are shown in Table 17. As in the previous experiment (Example 12), some of the components (including maltose) were not well separated from the sucrose, thereby accounting for why sucrose was slightly overestimated and maltose was missing in the analysis. This poor separation also accounted for why sucrose did not appear to be fully reduced by the enzyme action in these data, although it likely was fully reduced.
- Example 13 Tomato paste added during GTF enzyme incubation (Example 13) prevented excessive GTF-induced gelling and disrupted network formation, presumably by providing carbohydrate acceptor molecules due to its natural carbohydrate content.
- Example 13 thus demonstrated that it was possible to fine-tune texture generated by the GTFs, not just by adding pure carbohydrate mixtures, but also by adding carbohydrate-containing food ingredients, such as tomato paste. This result indicated that food ingredients that naturally contain carbohydrates can likely be used to fine-tune the texture provided by GTF activity in a food product/precursor in situ.
- 1.8-kg ketchup formulations were prepared according to the ingredient list in Table 18.
- these incubations could have been performed at a temperature between 0 °C and 50 °C, for example, such as by adjusting GTF enzyme dosages (generally, less enzyme would be needed at higher temperatures).
- the GTF enzyme incubations could have been performed at any pH between 3.7-8, in which the applied enzymes typically are both active.
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| WO2025198996A1 (en) * | 2024-03-19 | 2025-09-25 | Danisco Us Inc. | Method for improving flavor in foodstuff |
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| WO2026112560A1 (en) * | 2024-11-25 | 2026-05-28 | International N&H Denmark Aps | Use of glucosyltransferase in dough preparation |
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| CN120957606A (en) | 2025-11-14 |
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