WO2005073392A1 - グルコシル基の転移方法 - Google Patents
グルコシル基の転移方法 Download PDFInfo
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- WO2005073392A1 WO2005073392A1 PCT/JP2005/001088 JP2005001088W WO2005073392A1 WO 2005073392 A1 WO2005073392 A1 WO 2005073392A1 JP 2005001088 W JP2005001088 W JP 2005001088W WO 2005073392 A1 WO2005073392 A1 WO 2005073392A1
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- glucose
- darcosyl
- polyalcohol
- acid
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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
- 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
- C12P19/44—Preparation of O-glycosides, e.g. glucosides
Definitions
- the present invention relates to polyalcohol, glucuronic acid and / or a salt thereof (hereinafter, “glucuronic acid and Z or a salt thereof” are simply abbreviated to “glucuronic acid” in the present specification), and Darcos 6
- glucuronic acid and Z or a salt thereof are simply abbreviated to “glucuronic acid” in the present specification
- Darcos 6 A novel method for transferring a dalcosine group to a glycosyl derivative, more specifically, a novel method for transferring a dalcosinole group to polyalcohol, glucuronic acid, and glucose 6-sugar derivatives utilizing the action of trehalose phosphorylase It is about.
- Polyalcohols which are a kind of saccharides (generally referred to as “sugar alcohols” or “polyhydric alcohols"), gnorecuronic acid, and glucose 6-position carbohydrate derivatives are poorly cariogenic and difficult to treat. Since it has excellent functions as a food material, such as digestibility and salt formation with minerals, its related compounds, such as darcosyl-transferred polyalcohol, darcosyl-transferred dalcuronic acid, and darcosyl-transferred glucose 6-position carbohydrate derivative, etc. By manufacturing and analyzing these functions, there is a possibility that carbohydrates having better functions and new functions can be put to practical use.
- the transfer function of the gnorecosinole group by, for example, sucrose phosphorylase, kojibiose phosphorylase, hair darcosidase, dextransucrase, cyclomanoletodextrin glucanotransferase, etc. is utilized.
- sucrose phosphorylase kojibiose phosphorylase
- hair darcosidase dextransucrase
- cyclomanoletodextrin glucanotransferase etc.
- the products produced by these methods have their own characteristics in terms of the sugar composition and the structure of the individual carbohydrates contained therein due to the difference in the substrate specificity of the enzyme used.
- the functions to be exerted are also considered to be different.
- darcosyl-transferred polyalcohol, darcosyl-transferred glucuronic acid, and darcosyl-transferred glucuronic acid were produced using enzymes completely different from those used in the conventional methods for producing darcosyl-transferred polyalcohols, glycosyltransferred acidic sugars, and darcosyl-transferred glucose 6-saccharide derivatives. It was thought that if a method for producing a glucose 6-position carbohydrate derivative was provided, it would greatly contribute to the establishment of various production methods for carbohydrates having better functions and novel functions.
- an object of the present invention is to provide a novel method for producing a darcosinole-transferred polyalcohol, darcosyl-transferred dalcuronic acid, and darcosyl-transferred glucose 6-position saccharide derivative using an enzyme. is there.
- the present inventors In order to solve the above-mentioned problems, the present inventors first attempted to obtain a representative polyalcohol from a known sugar-related enzyme that is assumed to have a glycosyltransferase activity to a polyalcohol. We examined the effect of transferring darcosyl group to sorbitol, which is one of them. However, within the scope studied here, no enzyme could be established that could establish a new method to solve the above-mentioned problems. Therefore, the present inventors next set a darcosyl group on various types of polyalcohols other than sorbitol, targeting a wider group of enzymes regardless of whether or not they have glycosyl transfer activity to polyalcohol. Transfer effect was examined.
- Japanese Patent Application Laid-Open No. Hei 10-304881 by the same applicant describes that trehalose phosphorylase did not transfer a dalcosyl group to sorbitol. Although it has been considered that the enzyme has no action of transferring a gnorecosinole group to alcohol, it is quite surprising that the enzyme has a remarkable action of transferring a dalcosyl group to polyalcohols such as inositol. There was found.
- glucuronic acid an acidic sugar in which the 6-position of glucose is oxidized
- a dalcosyl group to an oligosaccharide in which a dalcosinole group or another sugar residue is bonded to the 6-position of glucose (a guanoleose 6-position carbohydrate derivative)
- trehalose phosphorylase has an effect of remarkably transferring a gnorecosinole group to glucose 6-position saccharide derivatives such as glucuronic acid and isomaltose.
- the scale of the reaction was expanded and the transfer reaction of the dalcosyl group to the polyalcohol, glucuronic acid, and the glucose 6-carbohydrate derivative by the reaction of trehalose phosphorylase was performed. It was confirmed that it can be advantageously used for industrial-scale production of transfer glucuronic acid and darcosyl transfer glucose 6-position carbohydrate derivative.
- the present invention has been made on the basis of the above-described original research results by the present inventors.
- the present invention relates to a sugar compound containing glucose as a constituent sugar, one or more polyalcohols selected from inositol, ribitol, erythritol and glycerol, glucuronic acid, and / or isomaltose, gentibiose.
- An object of the present invention is to solve the above problem by providing a method for transferring a gnorecosinole group.
- the transfer method of the present invention is characterized by high efficiency and a small amount of by-products as compared with the conventional darcosyl transfer method. According to the present method, it has been previously unknown or rare. It has been possible to produce the darcosyl-transferred polyalcohol, darcosyl-transferred daruconic acid and darcosinole-transferred gnorecose 6-saccharide derivative on an industrial scale.
- BEST MODE FOR CARRYING OUT THE INVENTION [0010] A method for transferring a dalcosyl group to the polyalcohol, glucuronic acid, and glucose 6-saccharide derivative of the present invention (hereinafter simply referred to as "the transfer method of the present invention” or “the transfer method”).
- Trehalose referred to in the present invention means a disaccharide represented by human D-darcosyl-D-darcoside.
- the trehalose phosphorylase referred to in the present invention means that the disaccharide trehalose is phosphorolyzed in the presence of inorganic phosphoric acid and / or a salt thereof to produce D-glucose and ⁇ _D-gnorecose-1 phosphate and Z Or a salt thereof (hereinafter, unless otherwise inconvenienced, “—D-glucose-1 phosphoric acid and / or a salt thereof” is simply abbreviated to “j3-D-gnocholose-1 phosphoric acid” )) As well as enzymes that catalyze this reverse reaction.
- the trehalose phosphorylase that can be used in the present invention is defined as described above, and one or more polyalcohols, glucuronic acid, and Z or glucose 6-position saccharide derivatives used in the present invention described in detail below.
- the origin, preparation method, and the like are not limited to specific ones as long as they have an action of transferring the Darcosinole group to one or more of the above.
- both the natural and recombinant enzymes derived from Thermoanaerobium 'Brocky (ATCC 35047), disclosed in Japanese Patent Application Laid-Open No. Hei 10-304881 by the same applicant, are useful in the present invention. Available.
- Mutant enzymes obtained by applying a protein engineering technique to DNA encoding the same enzyme disclosed in the same publication are also used in the present invention as long as the desired transfer activity is not substantially eliminated. it can.
- trehalose phosphorylase derived from other microorganisms such as trehalose phospholipase derived from microorganisms belonging to the genus Plesiomonas, disclosed in Japanese Patent Application Laid-Open No. 8-131157, as long as they have the desired metastatic action.
- the use of a lylase or the like can be advantageously carried out.
- the polyalcohol referred to in the present invention is an alcohol having two or more hydroxyl groups in a molecule.
- the polyalcohol serving as the darcosyl group acceptor is one or more selected from inositol, ribitonone, erythritol, and glycerol, and there is no particular limitation on the preparation method and its existing form.
- preparations including commercially available products, isolated from nature, preparations enzymatically or chemically prepared or synthesized, and the progress of the enzymatic reaction in the transfer method of the present invention and products obtained by the transfer method Have no adverse effect on the use of Preparations containing contaminants other than the polyalcohol within a certain range, or compositions prepared by combining the above preparations may be used.
- Inositol includes stereoisomers such as myo-inositol, D-inositol and L-inositol. Although these inositol isomers can be advantageously used in the present invention, myo-inositol is particularly useful in the present invention because of its relatively high yield of gnorecosyl transfer products.
- Glucuronic acid in the present invention means an acidic sugar having a structure in which the 6-position of glucose is oxidized to a carboxyl group, and there is no particular limitation on the method for preparing the sugar and the form in which it is present.
- preparations including commercially available products, isolated from nature, preparations enzymatically or chemically prepared or synthesized, and the progress of the enzymatic reaction in the transfer method of the present invention or the transfer method
- a composition prepared by combining the above-mentioned preparations or a preparation containing contaminants other than the glucuronic acid as far as the use of the product is not adversely affected.
- the glucose 6-position saccharide derivative in the present invention means a derivative in which the 6-position of a glucose molecule is bonded to another saccharide.
- the glucose 6-position saccharide derivative serving as the darcosyl group receptor in the present invention is one or more selected from isomaltose, gentibiose, melibiose, isomalttriose and isopanose, and its preparation method and its form
- preparations isolated from nature including commercial products, preparations enzymatically or chemically prepared or synthesized, and the progress of the enzymatic reaction in the transfer method of the present invention or the production by the transfer method
- a preparation containing contaminants other than the glucose 6-position saccharide derivative or a composition obtained by combining the above preparations may be used as long as the use of the preparation is not adversely affected.
- the sugar compound containing glucose as a constituent sugar used in the transfer method of the present invention includes gnorecose as a constituent sugar that becomes a dalcosyl group donor in a darcosyl transfer reaction caused by the action of trehalose phosphorylase. Derivatives of gnorecose, oligosaccharides and derivatives thereof.
- sugar compounds there are no particular restrictions on the method of preparation and the form of such sugar compounds.For example, preparations isolated from nature, preparations enzymatically or chemically prepared or synthesized, including commercial products, and further, The progress of the enzymatic reaction and the A preparation containing contaminants other than the sugar compound or a composition obtained by combining the above preparations may be used as long as the use of the product obtained by the transfer method is not adversely affected. .
- a relatively desirable sugar conjugate is ⁇ _D_glucose-1 phosphate.
- trehalose is reacted with trehalose phosphorylase, or manoletose is reacted with manoletose phosphorylase (available from Oriental Yeast Co., Ltd.).
- manoletose is reacted with manoletose phosphorylase (available from Oriental Yeast Co., Ltd.).
- cordiose phosphorylase acts on cordioligosaccharides such as kojibiose and kojitriose in which gnorecose is linked by a 1,2 bond.
- j3_D-gnorecose-1 phosphate may be produced, and this may be purified to a desired level by a conventional method, if necessary.
- the above oligosaccharides containing gnorecose as constituent sugars capable of producing / 3_D_glucose-1 phosphate under the action of an enzyme can also be used as they are.
- the production of i3_D_glucose-1 phosphate by the action of trehalose phosphorylase and the polyalcohol, glucuronic acid and / or glucose 6 from the produced i3_D_glucose-1 phosphate proceeds simultaneously.
- the above-mentioned maltose phosphorylase and / or kojibiose phosphorylase which generate ⁇ _D_glucose monophosphate from each can be transferred to the transfer method of the present invention.
- the desired transfer reaction can be advanced.
- trehalose phosphorylase polyalcohol, glucuronic acid, and / or a glucose 6-position sugar derivative, and a saccharide compound containing glucose as a constituent sugar
- a “substrate” which refers to a sugar-containing compound containing gnorecose as a constituent sugar, which may be referred to as “substrate” in some cases), usually in an aqueous solution
- the gnorecosyl group is transferred to polyalcohol, glucuronic acid and the sugar derivative at position 6 or glucose 6 by the action of trehalose phosphorylase.
- the enzyme is completely Conditions that do not cause inactivation, i.e., the temperature is usually 70 ° C or lower, preferably 65 ° C or lower, and the pH is generally pH 4.0 to 9.0, preferably pH 5.0 to 5.0. 7.5 is preferred.
- the concentration of the substrate in the reaction mixture is not particularly limited as long as the desired reaction proceeds.
- the polyalcohol and the sugar conjugate containing gnorecose as a constituent sugar are each usually 0.1 to 40 mass%.
- the ratio of the two is usually 1: 0.1 to 400, preferably 1: 1 to 100, and more preferably 1: 2 to 50. It is preferable to set the range.
- a sugar conjugate containing gnorecose as a constituent sugar trehalose, maltose and / or kojibiose, if necessary, when maltose phosphorylase and / or kojibiose phosphorylase are used in combination, It is preferable that inorganic phosphoric acid and / or a salt thereof, for example, sodium dihydrogen phosphate or the like at an appropriate concentration coexist at an appropriate concentration, usually from 0.5 to 100 mM, and more preferably from 1 to 50 mM.
- the amount of trehalose phosphorylase to be used is usually 0.1 to 500 units, preferably 0.5 to 200 units, relative to the total amount lg of the substrate in the reaction mixture in terms of dry weight. It is.
- one unit of the trehalose phosphorylase activity is defined as a value obtained by reacting trehalose as a substrate at pH 5.5 and 60 ° C according to the method described in JP-A-10-304881 by the same applicant. Means the amount of enzyme that produces 1 zmol of D-glucose per minute.
- the reaction time using the above reaction mixture can be appropriately selected according to the degree of progress of the reaction, and is usually 2 to 200 hours, preferably 4 to 100 hours.
- the reaction temperature is usually at least room temperature, preferably at least 40 ° C, more preferably at least 50 ° C. Therefore, in carrying out the transfer method of the present invention, Temperature stability that can be used under such suitable temperature conditions, for example, the original activity when held at 60 ° C for 1 hour under conditions of optimal pH is usually 80% or more, preferably 85% or more.
- trehalose phosphorylase having a temperature stability of maintaining 90% or more.
- the trehalose phosphorylase disclosed in Japanese Patent Application Laid-Open No. Hei 10-304881 by the same applicant has such desirable temperature stability and is particularly useful in the practice of the present invention.
- a darcosyl-transferred polyalcohol, darcosyl-transferred darconic acid and Z or darcosyl-transferred Darucose 6-position saccharide derivative are formed in the reaction mixture.
- the term "dalcosyl-transferred polyalcohol” means all sugar compounds in which a polyalcohol and a dalcosyl group are covalently bonded.
- the gnorecosyl-transferred dalcuronic acid in the present invention means a saccharide compound in which gnorecuronic acid and a gnorecosyl group are covalently bonded.
- the term "glucosyl derivative at the 6-position of glucosyl transfer” refers to all saccharide compounds in which the saccharide derivative at the 6-position of glucose and the dalcosine group are covalently bonded.
- the Darcosinole-transferred polyalcohol produced by the transfer method of the present invention contains, as a structural unit, one gnorecosyl group together with the polyalcohol.
- the darcosinole-transferred gnorecuronic acid produced by the transfer method of the present invention contains one gnorecosyl group together with glucuronic acid as a structural unit.
- the darcosyl-transferred glucose 6-position carbohydrate derivative produced by the transfer method of the present invention contains one darcosinole group when there is no darcosyl group in the molecule of the gnorecose 6-position saccharide derivative, and one molecule in the molecule. Or, when two or more darcosinole groups are present, they contain one darcosyl group in addition to the gnorecose group of the glucose 6-position saccharide derivative.
- the binding mode between structural units in the dalcosinole-transferred polyalcohol, darcosyl-transferred glucuronic acid, or darcosyl-transferred glucose 6-position carbohydrate derivative produced by the transposition method of the present invention is the same as that in the case of the transfer method using an enzyme other than trehalose phosphorylase. May include binding modes characteristic of the invention that are not normally found.
- the polyalcohol used in the transfer reaction is inositol, which is a cyclic polyalcohol having 6 carbon atoms
- the resulting dalcosyl transfer polyalcohol may include a 1-1, darcoside bond as a bonding mode between constituent units.
- the darcosyl-transferred polyalcohol, darcosyl-transferred dalcuronic acid, and / or darcosyl-transferred dalcose 6-position carbohydrate derivative produced by the transfer method of the present invention may be used in the reaction mixture as it is, or It can be used for various purposes after being purified to a desired level by a conventional method. Therefore, the transfer method of the present invention is advantageously carried out as one step in the method for producing darcosyl-transferred polyalcohol, darcosyl-transferred glucuronic acid, glucosyl-transferred glucose 6-saccharide derivative, and Z or a substance containing these darcosyl-transferred products. it can.
- the present invention also provides a method for producing such a Darcosino-transferred polyalcohol, a Darcosyl-transferred Darc oxalate, a Darcosyl-transferred Dulcose 6-position saccharide derivative, and / or a product containing these Darcosyl-transferred products.
- the method includes a step of carrying out the transfer method of the present invention, and a darcosyl-transferred polyalcohol, a darcosyl-transferred dalc humic acid, a darcosyl-transferred glucose 6-position saccharide derivative, and / or a substance containing these darcosinole-transferred products produced in this step. Collecting the stake.
- the resulting darcosyl-transferred polyalcohol, darcosyl-transferred gnorecuronic acid, gnorecosyl-transferred glucose 6-position saccharide derivative, and / or these gnorecosyl-transferred product-containing products can be subjected to a conventional method, for example, activated carbon treatment, depending on the purpose.
- a conventional method for example, activated carbon treatment, depending on the purpose.
- the product produced by the production method of the present invention as described above may be obtained by converting a dalcosyl-transferred polyalcohol, a gnorecosyl-transferred dalcuronic acid, or a gnorecosinole-transferred gnorecose 6-position saccharide derivative from a pure state such as a crystal to another, depending on the purpose. It is provided in an appropriate form, such as a powder, a crystalline powder, a granule, a block, or a syrup, containing various kinds of purity up to the composition containing the component.
- the product produced by the production method of the present invention may be, for example, a sweetener, an indigestible sweetener, or a low cariogenic sweetness, similarly to the polyalcohol, dalcuronic acid, or glucose 6-saccharide derivative used in the present invention.
- a sweetener an indigestible sweetener, or a low cariogenic sweetness
- As a food moisturizer, starch aging inhibitor, intestinal regulator, mineral absorption enhancer, etc. can be advantageously used in various fields such as health foods, including foods and beverages, beverages, cosmetics, pharmaceuticals, and feeds. it can.
- products manufactured by the method of the present invention. Can also be used as a research reagent for analyzing its functionality.
- Glycosyl derivatives and / or their transfer products may be used as components of various functional agents such as preservatives, preservatives, antibacterial agents, antiviral agents, and biological function regulators as described above. It can be used in various fields.
- Thermoanaerobium 'Brocky (ATCC 35047) was cultured at a culture scale of 401 in a medium containing trehalose as a carbon source. Subsequently, according to the method described in the above publication, the bacterial cells collected from the culture were disrupted by ultrasonication, and the supernatant of the disrupted product was collected. It was subjected to the method for measuring trehalose phosphorylase activity described in the above-mentioned publication, and it was confirmed that the supernatant of the disrupted bacterial cells exhibited S-trehalose phosphorylase activity.
- the supernatant of the above disrupted bacterial cells was concentrated in a UF membrane to obtain 360 ml of an enzyme solution having a trehalose phosphorylase activity of about 30 units per ml. 300 ml of this was subsequently subjected to ion-exchange column chromatography using “DEAE-Toyopearl Gel” (manufactured by Tosoichi Co., Ltd.) and “Buchinoretoyokunoku 650 Genore” (Tosoichi Co., Ltd.) according to the method described in the above publication.
- DEAE-Toyopearl Gel manufactured by Tosoichi Co., Ltd.
- Buchinoretoyokunoku 650 Genore Tosoichi Co., Ltd.
- darcosyl-transferred polyalcohols produced from myo-inositol are darcosyl-transferred polyalcohols in which myo-inositol and dalcosyl groups are bonded in a molar ratio of 1: 1, the darcosyl-group transfer reaction to myo-inositol is performed. Shows that two types of gnorecosyl-transferred polyalcohols having different binding modes are produced.
- Example 1-3 Glucuronic acid and glucose by the action of trehalose phosphorylase
- glucuronic acid and glucose 6-position saccharide derivatives shown in Table 2 below were tested at reagent concentration / 3-D-glucose monophosphate at a concentration of 1% (w / v). At a concentration of 1.4% (w / v), the trehalose phosphorylase obtained in Example 1-1 in 1 unit per 1 ml, and vinegar. An aqueous solution containing an acid buffer (pH 6.0) at a concentration of 50 mM was prepared, and was kept at 50 ° C. for 24 hours for reaction.
- an acid buffer pH 6.0
- isomaltose, gentibiose, melibiose, isomalttriose, and isopanose i.e., a glucose 6-position sugar having a glucose residue on the reducing end side and a saccharide bonded to the 6-position of the darcose residue
- the quality derivative was evaluated as "++++", and the transfer of the gnorecosinole group was more remarkable than "10" in the case of gnorecuronic acid.
- the glucosyl derivative at the 6-position of glucosyltransferase produced by the action of trehalose phosphorylase is substantially one type in any of the above-mentioned saccharide derivatives at the 6-position of glucose. It was also found that there was an advantage that almost no by-products were formed.
- ⁇ _D_glucose-monophosphate contains 2% (w / v), myo-inositol 10% (w / v), and 1 unit of trehalose phosphorylase obtained by the method of Example 1-1.
- the aqueous solution whose pH was adjusted to 6.0 was maintained at 60 ° C. for 72 hours to carry out a transfer reaction of a gnorecosyl group to myo-inositol. Thereafter, the reaction solution was decolorized * desalted by a conventional method, and fractionated by column chromatography using an ion exchange resin.
- each fraction was analyzed by a conventional method, and the fraction in which the content of any of the gnorecosinolate-transferred myo-inositols produced in the above reaction per solid content was relatively higher than that in the reaction solution was determined. United.
- the combined fractions were concentrated to obtain a syrup containing Darcosinole-transferred myo-inositol having a solid content of about 72%.
- a part of this syrup was analyzed by GC described in Example 1-2, and calculated based on the peak area in the resulting chromatogram, the total dalcosyl-transferred myo-inositol per solid mass in this syrup was calculated. The content was estimated to be about 60%.
- the product is used as a sweetener, an indigestible sweetener, a low cariogenic sweetener, a humectant, a starch aging inhibitor, an intestinal suppressant, etc., in the fields of food and drink products including health foods and beverages, feedstuffs, feedstuffs, and cosmetics. It can be used advantageously in various fields such as the field and the pharmaceutical field.
- Example 3
- Trehalose was obtained at 20% (w / v), dipotassium phosphate-citrate buffer (pH 6.0) at 10 mM, gnorecuronic acid sodium salt at 2% (wZv), and the method of Example 1-1.
- An aqueous solution containing trehalose phosphorylase at 20 units / ml was prepared and maintained at 55 ° C. for 96 hours to carry out a transfer reaction of a dalcosinole group to gnorecuronic acid. Thereafter, the reaction solution was decolorized by a conventional method, adsorbed on an ion exchange resin, eluted with dilute hydrochloric acid, and fractionated by column chromatography using an ion exchange resin.
- each fraction was analyzed by a conventional method, and dalcosyl-transferred glucuronic acid-containing fractions were combined. The combined fractions were neutralized and concentrated to obtain a syrup containing a gluconic acid-transferred gluconic acid having a solid content of about 60%. A portion of this syrup was analyzed by GC described in Example 12 and calculated based on the peak area in the resulting chromatogram. The acid content was estimated to be about 70%.
- the product is used as an acidulant, sweetener, humectant, mineral stabilizer, etc. in various fields such as health foods, foods and beverages including beverages, feeds, feeds, cosmetics, and pharmaceuticals. It can be used advantageously.
- Trehalose was 20% (w / v)
- dipotassium phosphate monocitrate buffer ( ⁇ 6.0) was 5 mM
- isomaltose was 20% (w / v)
- the trehalose phosphonate obtained by the method of Example 1_1 was used.
- An aqueous solution containing 10 units / ml of lylase was prepared, and kept at 60 ° C. for 72 hours to perform a transfer reaction of a dalcosyl group to isomaltose. Thereafter, the reaction solution was decolorized and desalted by a conventional method, and fractionated by column chromatography using an ion exchange resin.
- the product is used as a sweetener, an indigestible sweetener, a cariogenic sweetener, a moisturizer, a starch aging inhibitor, an intestinal medicine, etc. It can be advantageously used in various fields such as the feed field.
- the present invention provides a method for treating trehalose phosphorylase with inositol, ribitole nore, erythritol, glycerol, glucuronic acid, isomaltose, gentibiose, melibiose, isomalttriose, and isopanose very efficiently. It is based on a completely unique discovery by the present inventors that they have an effect of transferring a group.
- the transfer method of the present invention it is possible to produce a darcosyl-transferred polyalcohol, a darcosyl-transferred glucuronic acid, and a darcosyl-transferred gnorecose 6-position carbohydrate derivative, which have not heretofore been known or rarely known, on an industrial scale.
- the gnorecosinole-transferred polyalcohol-containing material, dalcosyl-transferred glucuronic acid-containing material, and darcosyl-transferred glucose 6-position saccharide derivative-containing material produced using the transfer method of the present invention are used in the field of health foods and beverages including beverages. It can be advantageously used in various fields such as feed and feed, cosmetics, pharmaceuticals, and research reagents.
- the present invention is an invention having such remarkable functions and effects, and is an invention having a great significance to contribute to the art.
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US10/587,711 US20070154996A1 (en) | 2004-01-28 | 2005-01-27 | Method for transferring a glucosyl residue |
GB0616296A GB2425533B (en) | 2004-01-28 | 2005-01-27 | Method for transferring a glucosyl residue |
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JP2004019118A JP2005210925A (ja) | 2004-01-28 | 2004-01-28 | グルコシル基の転移方法 |
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JPH10304881A (ja) * | 1996-11-08 | 1998-11-17 | Hayashibara Biochem Lab Inc | トレハロースホスホリラーゼとその製造方法並びに用途 |
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TW565611B (en) * | 1996-11-08 | 2003-12-11 | Hayashibara Biochem Lab | Trehalose phosphorylase, its preparation and uses |
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2004
- 2004-01-28 JP JP2004019118A patent/JP2005210925A/ja not_active Withdrawn
-
2005
- 2005-01-27 US US10/587,711 patent/US20070154996A1/en not_active Abandoned
- 2005-01-27 WO PCT/JP2005/001088 patent/WO2005073392A1/ja active Application Filing
- 2005-01-27 GB GB0616296A patent/GB2425533B/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10304881A (ja) * | 1996-11-08 | 1998-11-17 | Hayashibara Biochem Lab Inc | トレハロースホスホリラーゼとその製造方法並びに用途 |
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Publication number | Publication date |
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GB2425533B (en) | 2009-07-22 |
US20070154996A1 (en) | 2007-07-05 |
JP2005210925A (ja) | 2005-08-11 |
GB2425533A (en) | 2006-11-01 |
GB0616296D0 (en) | 2006-09-27 |
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