CN100347183C - Non-reductive saccharide formation enzyme, its preparation and application - Google Patents

Abstract

Disclosed are novel non-reducing saccharide-forming enzyme, and its preparation and uses. The enzyme is obtainable from the culture of microorganisms such as Rhizobium sp. M-11 (FERM BP 4130) and Arthrobacter sp. Q36 (FERM BP-4316), and capable of forming non-reducing saccharides having a trehalose structure when allowed to act on reducing partial starch hydrolysates. Glucoamylase and alpha -glucosidase readily yield trehalose when allowed to act on the non-reducing saccharides. These non-reducing saccharides and trehalose are extensively useful in food products, cosmetics and pharmaceuticals.

Description

Unreductases produced of saccharide and preparation thereof and application

The present invention relates to a kind of new Unreductases produced of saccharide, and its preparation and using more particularly, relate to a kind of so new reductibility carbohydrate and generate enzyme: when it acts on one or more reductibility starch partial hydrolysates with the glucose polymerization degree more than 3 or 3, generate a kind of non-reducing saccharide with trehalose structure, also relate to the preparation of this kind of enzyme, and the microorganism that can produce this kind of enzyme.The invention still further relates to contain can by this kind of enzyme preparation be the composition of the non-reducing saccharide of terminal units with the trehalose structure, contain the lower carbohydrate of reductibility of above-mentioned non-reducing saccharide, and/or by the prepared trehalose of this carbohydrate.

Trehalose or α, α-trehalose are considered to the non-reducing saccharide be made up of glucose unit for a long time always.As at Advance in Carbohydrate Chemistry, 18 volumes, (publish) among the 201-225 (1963) and at Applied and Environmental Microbiology by the AcademicPress of the U.S., the 56th volume, disclosed in the 3213-3215 page or leaf (1990), trehalose extensively is present in microorganism, mushroom and the insect, but content is lower.Since non-reducing saccharide comprise not can with have amino material, as the trehalose of amino acid and proteins react,, can not change yet and contain amino acid whose material so they promptly can not cause amino-carbonyl reaction.Therefore, non-reducing saccharide is considered to use and does not worry causing unfavorable brown stain and go bad because above-mentioned reason just presses for a kind of method for preparing this reducing sugar of setting up

In the traditional preparation process method of trehalose and at Japanese patent application publication No. No.154, disclosed in 485 75, the microorganism of adopting, perhaps as Japanese patent application publication No. No.216, propose in 695/83, adopt simultaneously maltin-and maltose phosphorylase maltose is changed into trehalose.Yet, preceding a kind of method is unsuitable for plant-scale preparation, (expression-form of " w/w% " can be reduced to " % " in specification sheets because trehalose is being lower than 15w/w% as the content in the raw-material microorganism in dried solids (d.s.b.), except as otherwise noted), and separation and purification step complexity.Then a kind of scheme has following shortcoming:

(i) because trehalose generates by Cori ester, can not be as the maltose of substrate with higher concentration use; (ii) because the phosphorylating enzymatic reaction system is reversible reaction, so the output of purpose product trehalose is lower: (iii) to keep the stable of this reaction system and smoothly continuity its enzymatic reaction be actually difficulty.

Preparation about trehalose, at " Food Chemicals ", No.88, the 67-72 page or leaf is entitled as title in the chapters and sections of " Current Status ofStarch Application Development and Related Problems " for report is arranged in the special column of " Oligosaccharides " on (in August, 1992): " although trehalose has purposes widely, it is impossible that the method that the enzymatic by direct sugared shift reaction or hydrolysis reaction prepares trehalose is considered in this area from science." therefore, it is difficulty very that the method for preparing trehalose for the material enzymatic with starch is considered to from science.

Knowing already, by starch material, is terminal units with the reducing end under neutral group as the partial hydrolysate of the starch of liquefying starch, cyclodextrine and Fructus Hordei Germinatus oligose preparation usually.In specification sheets, the partial hydrolysate of this starch is called as " the starch partial hydrolysate of irreducibility ".The reducing power of this reductibility starch partial hydrolysate is typically expressed as " glucose equivalent (DE) value " with its dried solids restatement.Knew already, those products with higher DE value have lower molecular weight and viscosity usually in the reductibility starch partial hydrolysate, and higher suitable sugariness and reactivity, and easily, make its quality that unfavorable brown stain, smelly and rotten take place with the material such as amino acid and the proteins react that contain amino.

These unfavorable characteristics of reductibility starch partial hydrolysate change to some extent according to its DE value.And the relation between reductibility starch partial hydrolysate and its DE value is very important.Even think always that in the art it is impossible will breaking this relation.

The unique channel of breaking this relation is a kind ofly by hydro-reduction starch partial hydrolysate its reducing end under neutral group to be changed into hydroxyl and this hydrolysate is made non-reducing saccharide under higher hydrogen pressure.But, this method needs high-pressure sterilizing pot and expends a large amount of hydrogen and the energy, but also needs the control or the safety features of higher level to avoid disaster.Reductibility partial starch hydrolysate is different with products therefrom, because the former is made up of and the latter glucose unit, the sugar alcohol that is gained starch portion of product then is made up of glucose and sorbyl alcohol, may cause occurring digestive disorders or symptom of diarrhea when being used in it on human body.Therefore, press for to set up and a kind ofly reduce even eliminate the reducing power of reductibility starch partial hydrolysate and don't change with the method for glucose unit as the situation of its component sugars.

The objective of the invention is to provide a kind of new non-reducing saccharide and application thereof, and prepare by reductibility starch partial hydrolysate, so that the relation between the reductibility partial starch partial hydrolysate of thinking on breaking traditions and its DE value, and disclose the new purposes of this non-reducing saccharide.

For reaching above-mentioned purpose, the inventor has extensively screened the microorganism that can produce a kind of new Unreductases produced of saccharide, when this kind of enzyme acts on reductibility starch partial hydrolysate, can generate the non-reducing saccharide with trehalose structure.

The result, from the soil in Japanese Okayama and Soja city, isolated the new microbe of rhizobium (Rhizobium) respectively, called after " Rhizobium Sp.M-11 ", and the new microbe of genus arthrobacter (Arthrobacter), called after " Arthrobacter Sp.Q36 "; And find that mentioned microorganism can produce nonreducing sugar and generate enzyme, when this kind of enzyme acts on reductibility starch partial hydrolysate, can generation have the non-reducing saccharide of trehalose structure, and when this kind of enzyme acts on reductibility starch partial hydrolysate, prepare needed non-reducing saccharide easily.

We also find, again the gained non-reducing saccharide can be prepared trehalose at an easy rate with glucoamylase or alpha-glucosidase processing by earlier this kind of enzyme being acted on reductibility starch partial hydrolysate.Like this, the inventor has finished this invention.In addition, we have also extensively screened the microorganism that can produce this kind of enzyme from conventional microorganism.

Found that, the microorganism of brevibacterium sp (Brevibacterium), Flavobacterium (Flavobacterium), microballon Pseudomonas (Micrococcus), Campylobacter (Curtobacterium) and native Bacillaceae (Terrabacter) is the same with the microorganism of rhizobium and genus arthrobacter to produce this Unreductases produced of saccharide, and we have finished this invention.In addition, we have set up preparation contains this non-reducing saccharide and contains the lower carbohydrate of the reductibility of non-reducing saccharide and/or the composition of the trehalose made by this carbohydrate such as the article process of food, makeup and medicine, and we have finished this invention.

Fig. 1 represents the active influence of temperature to the Unreductases produced of saccharide that obtained by the Rhizobium SP.M-11 bacterium of rhizobium.

Fig. 2 represents the active influence of pH value to the Unreductases produced of saccharide that obtained by the Rhizobium SP.M-11 bacterium of rhizobium.

Fig. 3 represents the thermostability by the Unreductases produced of saccharide of Rhizibium SP.M-11 bacterium acquisition.

Fig. 4 represents the pH stability by the Unreductases produced of saccharide of Rhizibium SP.M-11 bacterium acquisition.

Fig. 5 represents the active influence of temperature to the Unreductases produced of saccharide that obtained by the Arthrobacter SP.Q36 bacterium of genus arthrobacter.

Fig. 6 represents the active influence of pH value to the Unreductases produced of saccharide that obtained by Arthrobacter SP.Q36 bacterium.

Fig. 7 represents the thermostability by the Unreductases produced of saccharide of Arthrobacter SP.Q36 bacterium acquisition.

Fig. 8 represents the pH stability by the Unreductases produced of saccharide of Arthrobacter SP.Q36 acquisition.

The present invention relates to a kind of new Unreductases produced of saccharide, and its preparation and application. The invention still further relates to the microorganism that can produce this kind of enzyme, contain the relatively low reproducibility carbohydrate of said non-originality carbohydrate with the prepared non-reducing saccharide of this kind of enzyme, by the trehalose of these carbohydrates preparations and contain these carbohydrates and trehalose one of with both composition.

The inventor has extensively screened the microorganism that can produce a kind of new Unreductases produced of saccharide, can generate the non-reducing saccharide with trehalose structure when this kind of enzyme acts on reproducibility starch partial hydrolysate, has finally found objective microbe.

Now, the inventor at first sets forth this rhizobium microorganism, i.e. the qualification test of " Rhizobium Sp.M-11 " of the present invention bacterium. This test is according to carrying out in method described in " Bisebutsu-no-Bunvui-to-Dotei " (microorganism classification and evaluation). This book is edited by Takej Hasegawa. published Japan, Tokyo (1985) by publishing house of the Japanese association for science and technology. The result is as follows:

A. morphology

Feature when cell when in nutrient agar, cultivating for 27 ℃:

Generally be the shaft-like of 0.6～0.8 * 1.0～1.5 μ m;

General Individual existence, but also exist with coupling or joint form once in a while;

Do not show polymorphism;

Have motility, do not produce spore and flagellum;

Not acidproof;

Gramstaining: feminine gender;

Born of the same parents assist: do not have;

Volutin granules: have;

Can the many-β-Qiang Dingsuan of accumulation.

B. cultural characters

(1) when the character shape of formed bacterium colony when cultivating in the nutrient agar medium plate for 27 ℃: the diameter of circular bacterium colony is about 1.5mm after cultivating 24 hours;

Edge: complete;

Projection: average or semisphere:

Gloss: have;

Surface: smooth;

Color: oyster white is translucent;

(2) under 27 ℃ of temperature, the feature of the bacterium colony that forms when on the agar plate that contains glucose and Tryptones, cultivating

The oyster white translucent colony has mucoid;

(3) under 27 ℃ of temperature, the characteristics of the bacterium colony that forms when on the agar plate that contains yeast extract and N.F,USP MANNITOL, cultivating

Shape: cultivate after 5 days, the diameter of circular bacterium colony is about 3mm;

Color: the oyster white translucent colony has mucoid;

(4) under 27 ℃ of temperature, the feature of the bacterium colony that forms when on containing yeast extract, N.F,USP MANNITOL and Congo red agar plate, cultivating

Be the pale pink look and do not absorb Congo red basically;

(5) under 27 ℃ temperature, on the agar plate that contains yeast extract, N.F,USP MANNITOL and 2w/v%NaCl, grow;

(6) under 27 ℃ of temperature, the feature of the bacterium colony that forms when on the nutrient agar medium inclined-plane, cultivating

Growth: satisfactory;

Shape: thread; And

(7) can liquefy gelatin during stab culture on nutrient gelatin under 27 ℃ of temperature.

C. physiological property

(1) nitrate reduction: the positive

(2) denitrification: feminine gender

(3) methyl red test: feminine gender

(4) VP-test: feminine gender

(5) indoles generates: feminine gender

(6) hydrogen sulfide generates: the positive

(7) starch hydrolysis: feminine gender

(8) utilization of citric acid: the positive

(9) utilization in inorganic ammonia source;

Ammonium salt and nitrate have been utilized;

(10) generation of pigment: do not generate soluble pigment;

(11) urase: the positive

(12) oxydase: feminine gender

(13) catalase: the positive

(14) growth conditions: in pH 5.5～9.0 and 4～35 ℃ of scopes of temperature, grow;

(15) aerobic situation: aerobic;

(16) generation of the utilization of carbon source and acid

Carbon source	Utilize	Acid generates
			D-Glucose D-galactolipin D-Fructose Arabinose D-wood sugar L-rhamnose maltose sucrose lactose trehalose gossypose sweet mellow wine dextrin galactitol	+ + + + + + + + + + + + + +	+ + + + + + - + - - + - - -

(17) to amino acid whose decarboxylase test

To L-Methionin, L-arginine and L-ornithine are negative;

(18) amino acid whose utilization

Utilize L-Sodium Glutamate, L-Sodium L-aspartate, L-Histidine and L-proline(Pro);

(19) DNase (deoxyribonuclease): feminine gender;

(20) generation of 3-ketone lactose: feminine gender; And

(21) guanine of DNA (G) adds the Mol%:61% of cytosine(Cyt) (C).

With reference to " cypress Jie Shi systematic bacteriology handbook the 1st volume (1984) compares the bacterial characteristics of this microorganism and known microorganisms.The result confirms that this microorganism is strictly a kind of microorganism of rhizobium.This microorganism is similar to sweet clover root nodule bacterial classification (Rhizobium melitoti) on some characteristic, but they are different in the following areas: microorganism of the present invention utilizes maltose, lactose and N.F,USP MANNITOL but does not generate acid, it can produce a kind of Unreductases produced of saccharide, can generate the non-reducing saccharide with trehalose structure when this kind of enzyme acts on reductibility starch partial hydrolysate.A kind of like this microorganism that does not have publication to report to have this specific character.

Based on these results, the inventor is this microorganism called after " Rhizobium Sp.M-11 ", and on December 24th, 1992 it is deposited in the fermentation research institute of industrial science technical body, Ibaraki, Japan.Microorganism De Bao KURA was accepted the same day, and number was preserved with go into hiding of FERM BP-4130 by this institute.

Except top microorganism of identifying, other bacterial strain of rhizobium and mutant thereof also can suitably be used for the present invention, as long as they can produce this Unreductases produced of saccharide.

To a kind of microorganism of genus arthrobacter, the qualification test of Arthobacter Sp.Q36 bacterium promptly of the present invention has drawn following result.This test is similar with the evaluation of Rhizobium Sp.M-11 bacterium, also is to carry out according to the method for being put down in writing in " Biseibutsu-no-Bunrui-to-Dotei " (microorganism classification and evaluation) book.This book is edited by Takej Hasegawa, is published Japan, Tokyo (1985) by press of the Japanese association for science and technology.The result is as follows:

A. shape

(1) feature when cell when cultivating in nutrient agar medium under 27 ℃ of temperature is the shaft-like of 0.5～0.7 * 0.8～1.6 μ m usually;

Individual existence;

Show polymorphism;

Do not possess motility, flagellum and do not produce spore;

Not acidproof;

Gramstaining: the positive;

Born of the same parents assist: do not have;

(2) feature when cell when cultivating in EYG agar under 27 ℃ the temperature is shaft-like ball collar.

B. cultural characters

(1) under 27 ℃ of temperature. the feature of the bacterium colony that forms when on the nutrient agar medium plate, cultivating:

Shape: cultivate that the diameter of circular bacterium colony is about 2-2.5mm after 3 days;

Edge: complete;

Projection: semisphere;

Gloss: moistening gloss;

Surface: smooth;

Color: translucent and white or faint yellow;

(2) under 27 ℃ of temperature, the feature of cell when on the nutrient agar medium plate, carrying out slant culture

Growth rate: satisfactory;

Shape: thread

(3) when under 27 ℃ of temperature, the feature of cell when on the agar plate that contains yeast extract and peptone, carrying out slant culture

Growth rate; Satisfactory;

Shape: thread;

(4) feature of cell liquefaction meat soup and gelatin when carrying out stab culture in meat soup and the gelatin under 27 ℃ of temperature:

C. physiological property

(1) nitrate reduction: have

(2) denitrification: do not have

(3) methyl red test: feminine gender

(4) VP-test: the positive

(5) generation of indoles: feminine gender

(6) generation of hydrogen sulfide: the positive

(7) starch hydrolysis: feminine gender

(8) cellulose hydrolysis effect: feminine gender

(9) utilization of citric acid: the positive

(10) inorganic nitrogen-sourced utilization

Ammonium salt and nitrate have been utilized

(11) generation of pigment: feminine gender

(12) urase: the positive

(13) oxydase: feminine gender

(14) catalase: the positive

(15) growth conditions: in the scope of pH 5-10 and temperature 4-37 ℃, grow

(16) aerobic situation: aerobic

(17) generation of the utilization of carbon source and acid

Carbon source	Utilize	The generation of acid
			D-Glucose D-galactolipin D-Fructose Arabinose D-wood sugar L-rhamnose maltose sucrose lactose gossypose mannose dextrin galactitol	+ + + + + + + + + + + + +	- - - - - - - - - - - - -

(18) amino acid whose utilization

Utilize L-Sodium Glutamate, L-Sodium L-aspartate, the slow propylhomoserin of L-and L-proline(Pro);

(19) deoxyribonuclease-(DNase): feminine gender;

(20) generation of 3-ketone lactose: feminine gender;

(21) the main diamino acid of cell walls: Methionin;

(22) Mol%:63% of guanine (G) and cytosine(Cyt) among the DNA.

With reference to " cypress Jie Shi systematic bacteriology handbook, the 2nd volume (1984) compares the bacteriology characteristic of this microorganism and known microorganisms.Found that this microorganism is proved to be the microorganism of genus arthrobacter.This microorganism has such feature: it can produce a kind of Unreductases produced of saccharide, can generate the non-reducing saccharide with trehalose structure when this kind of enzyme acts on reductibility starch partial hydrolysate.Also there is not publication to put down in writing a kind of like this enzyme.

Based on The above results, the inventor orders the bacterium into " Arthobacter Sp.Q36 " surely with this microorganism, and on June 3rd, 1993 it is deposited in the state-run bio-science and the human body technical institute of industrial science technical body, Ibarak, Japan.The preservation of this microorganism was accepted the same day, and number was preserved with go into hiding of FERM BP-4316 by this institute.

Except that mentioned microorganism, other bacterial strain of genus arthrobacter and mutant thereof also can be suitable is used for the present invention, as long as they can produce this Unreductases produced of saccharide.

Any microorganism all can be used for the present invention, as long as it can produce this kind of enzyme.For example, except that above-mentioned Rhizobium Sp.M-11 (FERM BP-4130) and Arthrobacter Sp.Q36 (FERM BP-4316), hitherto known other microorganism, as the microorganism to sow: Brevibacterium helovolum (ATCC 11822), flavobacterium aquatile (Flavobacteriumaquatitle) (IFO 3772), micrococcus luteus (MicrococcusLuteus) (IFO 3064), micrococcus roseus (Micrococcusroseus) (ATCC 186), the shame dirt divides skill bacillus (MycobacteriumSegmatis) (ATCC 19420), and Terrabacter tumescens (IFO 12960) and their mutant also can be advantageously used in the present invention.

Any nutritional medium all can be used for the present invention, as long as this microorganism can grow therein and produce this Unreductases produced of saccharide: for example, synthetic and natural nutritional medium all can be used as this nutritional medium.Any carbonaceous material all can be used as carbon source of the present invention, as long as it can be utilized by this microorganism: the example of this carbon source has carbohydrate, as glucose, fructose, lactose, sucrose, sweet sugar alcohol, sorbyl alcohol, molasses and reductibility starch partial hydrolysate; Also has organic acid, as citric acid and succsinic acid.The concentration of this carbon source is suitably to select in the nutritional medium.For example, when adopting reductibility starch partial hydrolysate, in view of microbial growth, ideal concentration is generally 20% or lower in dried solids, is 5% or lower more particularly, and can be used for ammonia of the present invention source has, for example mineral compound resembles ammonium salt and nitrate; Also have ammoniated organic substance, resemble urea, corn steep liquor, casein, peptone, yeast extract and extractum carnis.Can be used for inorganic components of the present invention has, for example, and calcium salt, magnesium salts, sylvite, sodium salt, phosphoric acid salt, other salt of magnesium, zinc, iron, copper, molybdenum and cobalt in addition.If necessary, also amino acid and VITAMIN suitably can be used in combination.

Can be used for microorganism of the present invention is to cultivate under aerobic condition, and typical temperature is 4-40 ℃, and 20～37 ℃ more satisfactory; PH is 4-10, and pH 5-9 is more satisfactory.It is longer to be used for the fixed time that begins to grow than this microorganism of incubation time of the present invention, and 10-100 hour better.Dissolved oxygen in the nutritional medium (DO) concentration is not subjected to particular restriction, but usually in 0.5～20ppm scope.The mode of ventilating, stir, fill oxygen and improve the internal pressure of fermentor tank by control can maintain DO concentration in this scope.Cultivation can batch mode or continuous mode carry out.

After finishing microorganism culturing, reclaim this kind of enzyme.Owing in cell and acellular supernatant liquor, all found this kind of enzyme, therefore, these cells and supernatant liquor can have been reclaimed as rough enzyme.The gained culture also can intactly be used as rough enzyme.Traditional liquid-solid separation method can be in the present invention as the method for removing cell from culture.For example, directly with those methods of gained culture centrifugal, also useful precoating filter filters the method for culture, or the method for the membrane filtration isolated cell by dull and stereotyped filter of employing or serial fiber (follow fibers) all can suitably adopt.The cell-free filtrate that even now obtained can be intact as enzyme solution, but it can be concentrated before usefulness.Can be used for concentration method of the present invention has, and for example saltouts with sulfate of ammoniac, and with acetone and ethanol sedimentation, also available film such as dull and stereotyped filter and serial fiber concentrate.

Cell-free filtrate and enriched material thereof can carry out conventional immobilization to be handled.The example of this ordinary method has the combined techniques that utilizes ion-exchanger, utilizes the covalent bonds and the absorption process of resin and film, and the method that includes of utilizing high molecular weight material.Isolated cell can not add any processing as rough enzyme from the gained culture, perhaps is fixed before use.For example, thus by this cell being mixed with sodiun alginate and the gained mixture being splashed in the calcium chloride solution so that the liquid gel that is splashed into changes into particle is fixed.Therefore the particle that is obtained can be fixed by handling with polymine or Wu Er Chuo.Cell extract also can be used as rough enzyme solution in the present invention.For example, prepare the transparent rough enzyme solution that contains this kind of enzyme by from the cell of handling with ultrasonic disruption, the Mechanical Crushing of utilizing granulated glass sphere and aluminum oxide and frehch-press breaking method, extracting this kind of enzyme; And carry out centrifugal or the membrane filtration processing to resulting extract.

The rough enzyme solution that is obtained thus can be used as it is or re-uses after purifying with ordinary method.For example, bands of a spectrum only appear in the zymin of purifying when electrophoresis, and the preparation of this purifying enzyme is: dialysis is through ammonium sulfate precipitation and concentrate made crude zyme preparation: and with adopting " DEAE Toyopearl ^" anion exchange chromatography, employing " the Butyl Toyopearl of (a kind of anionite-exchange resin) ^" (a kind of hydrophobic resin) the hydrophobicity column chromatography and adopt: " Toyopearl ^HW-55 " the gel-filtration chromatography purifying dialysis solution continuously of (a kind of resin that is used for gel-filtration).Above-mentioned resin all is the product (Japan, Tokyo) of Tosoh company.

This Unreductases produced of saccharide that is obtained thus has following physics-chem characteristic:

(1) effect

When acting on one or more reductibility starch partial hydrolysates with 3 or 3 above glucose polymerization degrees, generating with the trehalose structure is the non-reducing saccharide of terminal units;

(2) molecular weight

Record and be about 76,000 ± 87,000 dalton by the 12 basic sodium sulfate-polyacrylamide gel electrophoresises (SDS-PAGE) of washing;

(3) iso-electric point (PI)

When utilizing amphotericeledrolyte electrophoresis such as to carry out, be about 3.6 ± 4.6;

(4) optimum temperuture

When under pH 7.0 conditions, cultivating 60 minutes, be about 35-40 ℃;

(5) optimal pH

When under 40 ℃ of temperature, cultivating 60 minutes, be about pH 6.4-7.2;

(6) thermostability

When under pH 7.0 conditions, cultivating 60 minutes, under about 35-40 ℃ of temperature, all be stable;

(7) pH stability

When cultivating 18 hours under 25 ℃ of temperature, pH is stabilized in 5.5～11.0 scope.

The determination of activity of this nonreducing sugar generation enzyme is as follows: the 1ml enzyme solution is added in the Fructus Hordei Germinatus pentose of 4ml with the 1.25w/w% of phosphoric acid buffer (pH 7.0) preparation of 50mM, and this mixed solution is incubated 60 minutes at 40 ℃.With this reaction mixture be heated to 100 ℃ handle 10 minutes with eventually to this enzymatic reaction, and this reaction mixture is accurately diluted 10 times with deionized water, then measure the reducing power of this diluting soln with Somogyi-Nelson ' s method.In contrast, handled 10 minutes so that the enzyme solution of its inactivation is similarly handled once being heated to 100 ℃.An activity unit of this enzyme is defined in the needed enzyme amount of reducing power of eliminating 1 micromole's Fructus Hordei Germinatus pentose in 1 minute.

The reductibility partial starch hydrolysate that can be used as the substrate of this kind of enzyme is that those pass through with amylase or acid moieties hydrolyzed starch shape material, as the prepared product of starch, amylopectin and amylose starch.By this reductibility starch partial hydrolysate with amylorrhexis obtained, comprise that those generate the prepared hydrolysate with straight chain and branched structure of enzymic hydrolysis amylasceous substance with amylase such as α-Dian Fenmei, trisaccharide maltose generation enzyme, maltotetrose generation enzyme, Fructus Hordei Germinatus pentose generation enzyme and Fructus Hordei Germinatus hexose, as disclosed (Japan in Handbookof Amylases and Related Enzymes one book of publishing by Dergamon press, Tokyo, 1988).When the partial hydrolysate of preparation reductibility starch, it is favourable that debranching factor is used in combination with amylase as Starch debranching enzyme and isoamylase.Can be with one or more maltose oligose such as trisaccharide maltose, maltotetrose, Fructus Hordei Germinatus pentose, Fructus Hordei Germinatus hexose and Fructus Hordei Germinatus heptose arbitrarily as the partial hydrolysate of reductibility starch.

The concentration that is used as the reductibility starch partial hydrolysate of substrate in the present invention there is not particular determination.Even if also can take place although the concentration of substrate solution is low to moderate this enzymatic reaction in 0.1% o'clock,, when the concentration of substrate solution is 2% or that this enzymatic reaction meeting is carried out when higher is better, preferably adopting concentration is 5～50% substrate (d.s.b.).Under such concentration, the non-reducing saccharide with trehalose structure can gratifying high yield form smoothly.But the suspension that contains insoluble substrate also thing in the present invention.The temperature of enzymatic reaction of the present invention can be definite like this, and this kind of enzyme can inactivation under this temperature, and promptly temperature of reaction can reach about 55 ℃, preferably adopts the temperature in 40～50 ℃ of scopes.The pH that is used for the reaction of this enzymatic is controlled at 5～10 scope, is preferably between the 6-8.The reaction times of this enzymatic reaction is suitably selected according to enzymatic reaction condition.

The reducing power of the resulting reaction mixture that contains non-reducing saccharide is far below the reducing power as the reductibility starch partial hydrolysate of substrate.For example, when being substrate with the Fructus Hordei Germinatus heptose, it is about 93% that its original reducing power reduces, and the original relatively reducing power of its reducing power drops to about 7% in other words.

The reaction mixture of gained filters and centrifugation with ordinary method so that remove insoluble substance, and with activated carbon with the decolouring of gained solution, the ion-exchanger desalination with H type and OH type is condensed into the pulpous state goods then.This pulpous state goods can suitably be dried to powder.If necessary, can easily this powder be prepared into the non-reducing saccharide with maximum possible purity, by adopting one or more methods this powder of purifying to be prepared, for example, the column chromatography fractional separation, resemble ion-exchange chromatography, adopt the column chromatography of activated carbon and silica gel; Adopt organic acid such as acetone and alcoholic acid partition method; And decompose and remove residual reductibility carbohydrate with alkaline purification.

More particularly, the ion-exchange chromatography method can suitably be used as the method that technical scale prepares this target carbohydrate in the present invention.Target non-reducing saccharide with improved purity can be removed with the column chromatography that adopts storng-acid cation exchange resin (as in Japanese patent application publication No.: described in 23,799/83 and 72,598/83) and follow carbohydrate and make.In this case, can use any in fixed bed, moving-bed and half moving method.

If necessary, this lower carbohydrate of reductibility that has the non-reducing saccharide of trehalose structure or contain this non-reducing saccharide of available starches enzyme such as α-Dian Fenmei, beta-amylase, glucoamylase and alpha-glucosidase hydrolysis, to control its sugariness and reducing power or to reduce its viscosity: and the product of gained can also further be handled with various treatment processs, in treating processes, residual reducing sugar is hydrogenated the saccharogenesis ferment and loses its reducing power.

More particularly, can prepare trehalose at an easy rate by the lower carbohydrate of reducing power that glucoamylase or alpha-glucosidase is acted on this non-reducing saccharide or contain this sugar.Generate trehalose and glucose mixture by act on this carbohydrate with glucoamylase or alpha-glucosidase, and this mixture carried out above-mentioned purification process, can obtain the part of high content of trehalose as ion-exchange chromatography to remove wherein glucose.The pulpous state goods can suitably be purified and be condensed into to this high content of trehalose part, and, if necessary, this pulpous state goods can be condensed into supersaturated solution, then crystallize into water or anhydrous crystal trehalose, and reclaimed the gained crystal.

In order to prepare the water crystallization trehalose is arranged, with purity be about 60% or the higher aqueous trehalose that is approximately 65-90% put into crystallizer, at 95 ℃ or more under the low temperature, preferably in 10-90 ℃ temperature range, progressively cool off under the situation of 0.1～20% crystal seed and stir having, to obtain a kind of massecuite that the water crystallization trehalose is arranged that contains.Ordinary method can be used to prepare the crystalline sugars that the trehalose of water crystallization massecuite is arranged or contain this sugar in the present invention as separation method, agglomerate comminuting method, fluid bed granulation method and spray-drying process.

When separating, usually massecuite is carried out blue formula centrifugal treating, separating from mother liquor has the water crystallization trehalose, and if necessary, available a small amount of cold water sprays washs this water crystallization trehalose, so as preparation purity higher the water crystallization trehalose arranged.When spraying drying, spraying concentration by a high-pressure pump from nozzle is that 70～85% (d.s.b.) degree of crystallinity is 20～60) massecuite of % (d.s.b.), and with 60～100 ℃ the dry products therefrom of warm air (this temperature can not melt the gained crystal powder); Aging gained crystal powder 1-20 hour blows 30～60 ℃ warm air simultaneously, and can prepare does not at an easy rate have or do not have basically hygroscopic crystalline sugars.When agglomerate is pulverized, by being 10～20% with water content, degree of crystallinity is about that 10～60% (d.s.b.) massecuite left standstill 0.1-3 days so that all content crystallizations and be solidified into bulk, pulverize then or chopping gained agglomerate, can prepare does not easily have water absorbability or does not have hygroscopic crystalline sugars basically.

Although can prepare the anhydrous crystal trehalose by the crystallization that drying will have the water crystallization trehalose to change into anhydrous form; but; generally be by the solution of a kind of water content less than 10% high content of trehalose is provided; this solution is put into crystallizer; under the situation that has crystal seed to exist, this solution is remained on 50～160 ℃; be preferably in 80～140 ℃ of temperature ranges and stirring; to obtain containing the massecuite of anhydrous crystal trehalose, pulverize by ordinary method such as agglomerate; fluid bed granulation and spraying drying carry out crystallization and morcel this anhydrous crystal trehalose preparing this trehalose.

According to the present invention, resulting non-reducing saccharide is compared with reductibility starch partial hydrolysate with the lower carbohydrate of the reductibility that contains this sugar has lower reducing power and advantages of higher stability, Just because of this, this carbohydrate can with other material amino acid and contain amino acid whose material such as oligopeptide and protein and mix and process and need not worry to cause this material unfavorable brown stain, smelly and rotten to occur particularly.Different with reductibility starch partial hydrolysate, this carbohydrate has lower reducing power and viscosity, and those have to compare with hydrolysate than the sugar of the low dextrose polymerization degree and have more gratifying quality and more moderate sugariness in this sugar.

This non-reducing saccharide becomes molecular weight lower irreducibility oligose or Fructus Hordei Germinatus oligose by amylase as the α-Dian Fenmeishuixie that pancreas produced, and this oligose is easy to, and enzymic hydrolysis becomes glucose and trehalose molecule with intestines by alpha-glucosidase.The gained trehalose is easy to be easy to be become glucose by hydrolyzing seaweed by trehalose.Therefore, when oral this non-reducing saccharide with contain the lower carbohydrate of reductibility of this sugar, and during trehalose, they can be used as the energy of human body.This carbohydrate and trehalose go up substantially do not contain by tooth with microbial fermentation, this make they can be used as tooth with the protectiveness sweetener.

This non-reducing saccharide has gratifying stability and sugariness with lower carbohydrate and the marine alga of reductibility that contains this sugar, and its crystallized form can omit alkane ketone as sugar coating material with caking agent such as pullulan, hydroxyethylamyle and polyethylene pyrrole arbitrarily.This carbohydrate and marine alga have following characteristic: the osmotic pressure controllability, and filler is given ability, and gloss is given ability, moisture-retaining capacity, and viscosity is given ability, and essentially no fermenting power prevents the ability that gelling starches is degenerated and prevents other carbohydrate crystalline ability.

The anhydrous crystal trehalose can suitably be used as the dried bath agent of food, makeup, medicine and material thereof and intermediate, and can make powdery easily with gratifying stability and quality, granular and sheet group contains thing.

Therefore, this non-reducing saccharide and contain the lower carbohydrate of the reductibility of this sugar and the trehalose that is prepared into by this sugar can be in various compositions, as in food, tobacco, cigarette, feed, pet food, makeup and the medicine by suitably as sweeting agent, odorant, quality booster, stablizer, vehicle and siccative.

This reductibility carbohydrate and contain the lower carbohydrate of the reductibility of this sugar and can intactly be used as the sugariness seasonings by the prepared trehalose of this sugar.If necessary, itself and an amount of one or more other sweeting agents can be used jointly, for example powdery syrup, glucose, maltose, sucrose, isomerized sugar, honey, maple sugar, oligomeric isomaltose, semi-lactosi oligose, fructose oligosaccharides, lactosucrose (Lactosucrose), sorbyl alcohol, maltol, lactonaphthol, dihydrochalcone, stevioside, alpha-glycosyl stevioside, rebaudin glycosides (rebaudioside), glycyrrhizin, L-aspartoyl L-phenylalanine methyl ester, asccharin and L-Ala; And/or filler such as dextrin, starch and lactose.

This non-reducing saccharide and contain the lower carbohydrate of the reductibility of this sugar and can be used as it is by powdery or crystalline trehalose that this sugar is made, but if necessary, also can before using, it be mixed with vehicle, weighting agent and tackiness agent, make particle, spherical, shaft-like (Shot-rods), tabular, square shape and on chip.

This non-reducing saccharide, contain the lower carbohydrate of the reductibility of this sugar and have following feature: (i) have the sweet taste that is in harmonious proportion well with sour flavor, tart flavour, saline taste, bitter taste, convergency tart flavour and delicious material by the trehalose that this sugar is prepared into; (ii) have very high acidproof, thermotolerance.Therefore can be very advantageously used as food and general sweeting agent, odorant and quality improving agent.

This non-reducing saccharide, contain the lower carbohydrate of the reductibility of this sugar and can be used in the following seasonings by the trehalose that this sugar is prepared into, as amino acid, peptide, soy sauce, the powdery soy sauce, " miso ", " funmatsu-miso " (miso powder); " moromi " (refining Japanese smart wine); " hishio " (refining soy sauce); " furikake " (seasoning fish meal); mayonnaise; seasonings; vinegar, " Sanbai-zu " (sugared sauce, the sauce oil and vinegar), " funmatsu-sushi-su " (the vinegar powder that is used for fillet fecula group), " Chuka-no-moto " (Chinese dishes promptly use seasoning matter), " tentsuyu " (sauce of the Japanese fried foodstuffs of a kind of deep fat), " mentsuyu " (sauce that is used for Japanese vermicelli), sauce, tomato-sauce, " yakiniku-no-tare " (sauce that is used for Japanese barbecue), curried thickening condiments, promptly use saucepan condiment, promptly use the sauce mixed ingredients, " dashi-no-moto " (promptly using former mix), the nucleic acid seasonings, mix seasonings, " mirin " (Japanese sweet pure mellow wine), " Shin-mirin " (a kind of synthetic mirin), dining table is with sugar and transfer coffee sugar.

And, this non-reducing saccharide, contain lower carbohydrate of the reductibility of this sugar and the trehalose that is prepared into by this clock sugar.Can freely be used for increasing sweet taste to following food: " wagashi " (Japanese cake) is as " Senbei " (a kind of rice pancake), " arare-mochi " (rice cake piece) " Okoshi " (millet-big rice cake), " mochi " (rice cream), " manju " (a kind of dessert that has beans sauce), " uiro " (a kind of sweet rice frozen glue), " an " (a kind of jam), " yokan " (sweet frozen glue of a kind of bean or pea), " mizu-yokan " (a kind of soft red bean frozen glue), " kingyo-ku " (a kind of yokan), jelly, pao de castella and " ame-dama " (a kind of Japan is prince wife too): candy such as dessert, biscuit; pancake; homely cooky; pie; pudding; creamed cheese; custard cheese; pop-over muffin, waffle; baba; doughnut; chocolate; chewing gum; caramel and crystalline sucrose; The parfait heart such as ice-creams and the iced dilution of house Bai Teshi nectar; Syrup is stuck with paste as flour paste, peanut cream, fruit paste and fruit sauce as " kajitsu-no-syrup-zuke " (a kind of canned fruit of making) and " korimitsu " (being used to create the syrup of ice); Finished fruits and vegetables such as jam, marmalade, " syrup-zuke " (a kind of fruit that salts down) and " toka " (preserved fruit): pickles and pickling food are as " fukujin-zure " (redness salt down sieve foretell), " bettara-zuke " (a kind of pickle fresh whole radish), " senmai-zuke " (a kind of pickle bright preserved radish strip) and rakkyo-zuke " (it is verdant to salt down): the premixture of pickles and pickling food is as " takuan-zuke-no-meto " (premixture of pickled radish) and " hakusai-zuke-no-moto " (marinading the premixture of bright Fructus Vins): meat product such as ham and sausage: fish product such as fish ham and fish sausage; " Kamaboko " (decatize flesh of fish cream); " chikuwa " (a kind of flesh of fish cream) and " tenpura " (a kind of Japanese deep fat fried fish tartar souce meat extract); " Chinmi " (seasonings) is as " uni-no-shiokara " (Saltwater Sea courage intestines), " ika-no-shiokara " (salty squid intestines), " Su-konbu " (finished kelp) " Saki-surume " (dried squid bar) and " fugu-no-mirin-boshi " (a kind of exsiccant is used the bloated fish of mirin seasoning); " tsukudani " (food that boils in soy sauce) is as laver, edible wild plant, dried squid, fish and shellfish; Home cooking is as " nimame " (boiling beans), potato salad and " konbu-maki " (laminaria roll); Milk preparation: the tinned food of canned and bottled food such as meat, the flesh of fish, fruits and vegetables; Alcoholic beverage is as synthetic Japanese sake, glucose and split wine; Soft drink such as coffee, tea, cocoa, fruit juice, soda pop, sour milk drink and contain the beverage of milk-acid bacteria; Promptly with food as promptly with the pudding mixture, promptly use hot cake mixture and " sokuseki-shiruco " (a kind of red bean soup and rice cake promptly use mixture) and promptly use the soup mixture; And the food of beverage such as infant food, treatment food, extra-nutrition, peptide group food and frozen food; Also can use it for taste and the quality of improving above-mentioned food.

This non-reducing saccharide, contain the lower carbohydrate of the reductibility of this sugar and be prepared into trehalose and also can be used for the feeds of feeding animals such as domestic animal, poultry, honeybee, silkworm and fish and feed for pet to improve its palatability by this sugar.This carbohydrate and trehalose can be used as sweetener, odorant, quality improving agent and the stablizer of other goods such as tobacco, cigarette, toothpaste, lipstick, kermes, lipstick, medicine for oral administration, tablet, lozenge, Oils,glyceridic,cod-liver drops, cachou, oral freshener, gargle, makeup and medicine with paste and liquid form.

This non-reducing saccharide, contain the trehalose that lower carbohydrate of the reductibility of this sugar and this sugar is prepared into and also can be used as quality improving agent and the stablizer that easily loses its effective ingredient and active biological active agents, and as containing the protective foods of this biological active agents and the quality improving agent and the stablizer of medicine.The example of this biological active agents has lymphokine, as α-, β-and gamma-interferon, tumor necrosis factor alpha-(TNF-α), tumour necrosis factor-β (TNF-β), macrophage migration inhibition factor, colony stimulating factor, transfer factor and interleukin II; Hormone stimulates the hormone element as Regular Insulin, tethelin, prolactin antagonist, erythropoietin, ooecium; Biological products are as BCG vaccine, Japanese encephalitis vaccine, Measles Vaccine, Poliomyelitis Vaccine alive, antismallpox vaccine, Toxoid,tetanus, Trimeresurus toxinicide and human immunoglobulin; Microbiotic is as penicillin, erythromycin, paraxin, tsiklomitsin, Streptomycin sulphate and sulphuric acid kanamycin; VITAMIN is as VB ₁, VB ₂, L-xitix, Oils,glyceridic,cod-liver, carotenoid, ergosterol and vitamin-E; Enzyme is as lipase, elastoser, urokinase, proteolytic enzyme, beta-amylase, isoamylase, dextranase and Sumylact L; Extract, as Radix Ginseng extract, tortoise extract, chlorella extract, Aloe extract and propolis extract; Living microorganism is as virus, lactobacillus and yeast; And other biological active agents.As royal jelly.Use this non-reducing saccharide, contain lower carbohydrate of the reductibility of this sugar and the trehalose that is prepared into by this sugar, above-mentioned biological active agents suitably can be prepared into protective foods and medicine, need not worry its effective constituent and active loss and inactivation with gratifying high stability and quality.

As mentioned above, with this non-reducing saccharide, contain the lower carbohydrate of the reductibility of this sugar and/or comprise ordinary method, as mixing, kneading, dissolving, fusion, immersion, infiltration, sprinkling, coating, coating, spraying, injection, crystallization and curing by the method that the trehalose that this sugar is prepared into mixes above-mentioned composition.This carbohydrate and trehalose be often with 0.1% or higher consumption, preferably with 1% or higher consumption (d.s.b.) mix above-mentioned composition.

The following examples will be set forth the present invention in more detail.

At first, explain that the non-reducing saccharide that is produced by a kind of new microorganism Rhizobium Sp.M-11 generates diastatic production, purification and characteristic; Secondly, the Unreductases produced of saccharide that is produced by Arthrobater Sp.Q36 Institute of Micro-biology is done the explanation of similar above-mentioned relevant Rhizobium Sp.M-11.The 3rd, the Unreductases produced of saccharide that is produced by hitherto known Institute of Micro-biology is described.

Embodiment 1

Produce Unreductases produced of saccharide by Rhizobium Sp.M-11

Will be by the maltose of 2.0w/v%, the peptone of 0.5w/v%, the yeast extract of 0.1w/v%, the Na of 0.1w/v% ₂HPO ₄, 0.1w/v% KH ₂PO ₄The liquid nutrient media of forming with water transfers to pH7.0.This nutritional medium of about 100ml equal portions is put into the triangular flask of 500ml, 120 ℃ of autoclavings 20 minutes to realize sterilization, cooling, the culture stoste of inoculation Rhizobium Sp.M-11 (FERE BP-4130) is under with the 130rpm agitation condition, cultivated 24 hours at 27 ℃.The gained culture is merged as microbial strain culture.

The identical nutritional medium of used substratum in the freshly prepd and above-mentioned cultivation of about 20L is put into the fermentor tank of a 30L, sterilize, be cooled to 30 ℃, with the inoculation of the microbial strain culture of 1w/v%, stir culture is 24 hours under 30 ℃, pH 6.0-8.0 and aerobic condition.The gained culture has the enzymic activity of about 1.5 units/ml.The centrifugal cell that makes of a part of culture is separated with culture supernatant, in the phosphoric acid buffer (pH7.0) of 50mM, make it reach original volume of this part cell suspension, the enzymic activity of subsequent analysis cell suspending liquid and culture supernatants, result are respectively 0.6 unit/ml and 0.9 unit/ml.

Embodiment 2

The purification of enzyme

The culture that is obtained among about 18L embodiment 1 is handled with " Mini-Rabo " (a kind of ultra-high voltage cell breaking plant of being sold by Dainippon medicine company limited, Japan, Tokyo), so that smudge cells.The gained mixture is with 10, and the speed of 000rpm obtained about 16L supernatant liquor in centrifugal 30 minutes.In this supernatant liquor, add (NH ₄) ₂SO ₄And make its dissolving; Reach 0.2 saturation ratio, gained solution was placed 1 hour at 4 ℃, and with 10, centrifugal 30 minutes of the speed of 000rpm obtains supernatant liquor.

With (NH ₄) ₂SO ₄Be dissolved in and obtain 0.6 saturation ratio in this supernatant liquor, gained solution is with 10, and the speed of 000rpm obtained throw out in centrifugal 30 minutes.The gained throw out is dissolved in the phosphoric acid buffer (pH 7.0) of 10mM, with a kind of phosphoric acid buffer dialysis 24 hours, with 10, centrifugal 30 minutes of the speed of 000rpm was removed insoluble substance to gained solution with freshly prepd.Resulting 360ml dialysis solution is divided into 2 parts, respectively with 300ml " DEAE-Toyopearl is housed ^" (product that Tosoh company goes out, a kind of ion-exchanger.Japan, Tokyo) post carries out column chromatography.

Target enzyme is attracted on the ion-exchanger, and can be by the freshly prepd same a kind of phosphoric acid buffer wash-out that is supplemented with salt.Have the active elutriant merging of target enzyme with resulting, and with having replenished 2M (NH ₄) ₂SO ₄Freshly prepd with the dialysis of a kind of phosphoric acid buffer.The dialyzate that is obtained is with 10, and centrifugal 30 minutes of the speed of 000rpm is removed insoluble substance.The gained supernatant liquor is with 300ml " Butyl-Toyopeal is housed ^" post in (by the organophilic gel that Tosoh company sells, Japan, Tokyo) carries out hydrophobic chromatography.Be adsorbed on enzyme on the gel by the buffer solution elution of the linear gradient of 2M to 0M, collect elutriant subsequently with enzymic activity.With gained elutriant " Toyopeal ^HW-55 " (by the resin that is used for gel chromatography that Tosoh company sells, Japan, Tokyo) carry out gel permeation chromatography, collects the cut with enzymic activity subsequently.The specific activity of enzyme activity and productive rate are as shown in table 1 in each purification step.

Table 1

	Enzymic activity	Than living	Productive rate
				Purification step	(unit)	(unit/mg protein)	(％)
Culture	26,800		100
				The supernatant liquor that cytoclasis is strict	20,300	0.10	76
With (NH 4) 2SO 4Dialyzate after saltouing	16,100	0.32	6.0
				The eluate of ion exchange column	1,300	5.5	42
The drainage column eluate	5,730	98	21
				The gel-filtration column eluate	3,890	195	15

By the purifying enzyme preparation of the elutriant form of gel-filtration column acquisition in the table 1, determine its purity by 7.5% polyacrylamide gel electrophoresis, a protein spectra only appears on gel, and this shows that said preparation is the higher electrophoresis homogeneity enzyme of purity.

Embodiment 3

The characteristic of enzyme

Resulting purifying enzyme preparation among the embodiment 2 is carried out electrophoretic process with 10% sodium dodecyl sulfate polyacrylamide gel, by comparison shows that with labelled protein (selling Japan, Tokyo by Japanese Bio-Rad laboratory) its molecular weight is about 77,000-87,000 dalton.

The zymin of purifying is carried out the iso-electric point electrophoresis with the polyacrylamide gel that 2v/v% " Ampholine " (a kind of amphotericeledrolyte that is provided by Pharmacia LKB Biotechnology AB, Sweden, Uppsala) is provided.The gained gel is cut into slices, and determine to contain the pH value of the gel film of this kind of enzyme, be about 3.6-4.6 with the PI value that confirms this kind of enzyme.

According in order to enzyme analysis active method research temperature and pH influence to enzyme.These results are shown among Fig. 1 and 2 respectively.When in pH 7.0, reaction 60 minutes the time, the optimum temperuture of this enzyme is 40 ℃: and be 40 ℃, reaction in the time of 60 minutes in temperature, the optimal pH of this enzyme is 7.0.The thermostability of this kind of enzyme is to determine like this: placed it in the phosphoric acid buffer (pH 7.0) of 50mM under different temperature insulation 60 minutes, the cooling buffering is also analyzed residual enzyme activity in every kind of damping fluid.The pH stability of this kind of enzyme is to measure like this; Place it in the damping fluid of phosphoric acid of the 50mM with different pH 25 ℃ of insulations 16 hours, the pH of each damping fluid is adjusted to 7.0, analyze the residual enzyme activity in every kind of damping fluid.About the result of thermostability and pH stability is shown in respectively in Fig. 3 and 4.This kind of enzyme is under the temperature about 40 ℃ and be stable under the condition of pH 6-9.

Embodiment 4

The preparation of non-reducing saccharide

Prepare a kind of aqueous solution of 20% glucose, maltose, trisaccharide maltose, maltotetrose, Fructus Hordei Germinatus pentose, Fructus Hordei Germinatus hexose or Fructus Hordei Germinatus heptose that contains as substrate, and its ratio with 2 units/g substrate (d.s.b.) is mixed with embodiment 2 gained purifying enzyme, the enzymatic reaction 48 hours under 40 ℃, the condition of pH 7.0 of gained mixture.Carry out high performance liquid chromatography (HPLC) analysis (above-mentioned chromatography column is to be sold Japan, Tokyo by Wako Purre chemical industry company limited) with the reaction mixture desalination and with " Wakobeads WB-T-330 post ".The HPLC process is carried out at ambient temperature, and the water that divides with flow velocity 0.5ml/ is elutriant, and with " RI-8012 " (a kind of differential by the sale of Tosoh company is analysed photometry, Japan, Tokyo) analytical reaction product.

The results are shown in the table 2.

Table 2

Substrate	Product	Elution time on HPLC (branch)	Per-cent (%)
				Glucose	Glucose	33.4	100.0
Maltose	Maltose	28.5	100.0
				Trisaccharide maltose	The PI trisaccharide maltose	23.3 25.9	35.0 65.0
Maltotetrose	The PII maltotetrose	21.6 24.1	85.6 14.4
				The Fructus Hordei Germinatus pentose	PIII Fructus Hordei Germinatus pentose	19.7 22.6	92.7 7.3
The Fructus Hordei Germinatus hexose	PIV Fructus Hordei Germinatus hexose	18.7 21.4	93.5 6.5
				The Fructus Hordei Germinatus heptose	PV Fructus Hordei Germinatus heptose	17.8 21.0	93.4 6.7

Annotate: symbol in the table " PI ", " PII ", " PIII ", " PIV " and " PV " represent corresponding substrate: the new carbohydrate that trisaccharide maltose, maltotetrose, Fructus Hordei Germinatus pentose, Fructus Hordei Germinatus hexose and Fructus Hordei Germinatus heptose are generated.

As can be seen from Table 2, every kind of reactant all is made up of residual substrate and newly-generated carbohydrate PI, PII, PIII, PIV and PV basically, do not detect other carbohydrate basically.It shows, the productive rate of PII, PIII, PIV and PV with 4 or 4 above glucose polymerization degrees is higher, and promptly productive rate is 85% or higher (d.s.b), and that glucose polymerization degree is the productivity ratio of the PI more than 3 or 3 is lower.It also shows, does not generate new carbohydrate in glucose and maltose.

For newly-generated carbohydrate in every kind of reaction mixture of purifying, with them at " XT-1016 (Na ⁺-form, 4% the polymerization degree) " carry out column chromatography on (a kind of basic metal storng-acid cation exchange resin, organic chemistry Industrial Co., Ltd in Tokyo produces, Japan, Tokyo).This resin is packed in 3 stainless steel columns of jacket layer, the internal diameter of every post is 2.0cm, long 1m, and 3 posts are serially connected, this carbohydrate reaction mixture that contains that in resin, adds 5v/v%, temperature remains on 55 ℃ in the post, and the SV with 0.13 (space flow speed) flow velocity is with 55 ℃ of hot water elutions, contains 97% or the high purity carbohydrate cut of how new carbohydrate (d.s.b.) with acquisition.This cut is dry in a vacuum, to obtain the high purity preparation of new sugar.The productive rate of relative its raw material sugar of the productive rate of PI, PII, PIII, PIV and PV is about 9%, 65%, 82%, 80% and 77% (d.s.b.) respectively.The purity of PI, PII, PIII, PIV and PV is respectively 97.5%, 98.6%, 99.5%, 98.4% and 98.4% (d.s.b.).

The reducing power of these new carbohydrates is measured with Somogyi-Nelson ' s method and is represented with DE (glucose equivalent).Gained the results are shown in table 3.

Table 3

The sugar preparation	Purity (%)	DE
			PI PII PIII PIV PV	97.5 98.6 99.5 98.4 98.4	0.83 0.35 0.10 0.27 0.23

Result from table 3 as can be seen, every kind of sugared preparation only shows very faint reducing power.Estimate that these faint reducing powers are to cause that because of the remaining reductibility maltose oligose from substrate can draw such conclusion thus: newly-generated carbohydrate is the carbohydrate of no reductibility basically.

Embodiment 5

Mailland reaction

The solution that will contain a kind of PI, PII, PIII, PIV or PV sugar preparation and 50mM phosphoric acid buffer (pH 7.0) among the embodiment 4 of 1% glycine and 10% kept 90 minutes at 100 ℃, with postcooling gained solution, measure it in the absorbancy in the 1-cm cuvette under the 480nm wavelength.In contrast, trisaccharide maltose, maltotetrose, Fructus Hordei Germinatus pentose, Fructus Hordei Germinatus hexose and Fructus Hordei Germinatus heptose are carried out similar processing and measure its absorbancy under the 480nm wavelength as sugared preparation material.The results are shown in the table 4.

Table 4

The sugar preparation	Colourity (480nm)	Judge
			PI	0.027	The present invention
PII	0.018	The present invention
			PIII	0.012	The present invention
PIV	0.016	The present invention
			PV	0.015	The present invention
Trisaccharide maltose	0.623	Contrast
			Maltotetrose	0.475	Contrast
The Fructus Hordei Germinatus pentose	0.369	Contrast
			The Fructus Hordei Germinatus hexose	0.318	Contrast
The Fructus Hordei Germinatus heptose	0.271	Contrast

As can be seen from Table 4, newly-generated non-reducing saccharide PI, PII, PIII, PIV and PV only shows very small painted because of due to the mailland reaction, and promptly its colourity only is the 3-6% of its corresponding maltose oligose material.This result shows that mailland reaction does not take place the non-reducing saccharide that is generated by this kind of enzyme basically.

Embodiment 6

The enzymically hydrolyse of glucoamylase

The 50mg aliquots containig of non-reducing saccharide PI, PII, PIII, PIV and PV among the embodiment 4 is dissolved in respectively in the acetate buffer (pH 4.5) of 1ml 50mM, and mix mutually with the glucoamylase (Sei-Kagaku-Kogyo company limited product) of 1 unit, at 40 ℃ of enzymically hydrolyses that carry out 6 hours.The carbohydrate that detects in every kind of gained mixture when HPLC analyzes all is glucose and trehalose, and its molecular ratio is shown in Table 5.

The sugar preparation	Glucose (%)	Trehalose (%)	Molecular ratio (glucose/trehalose)
				PI	36.2	63.8	1.07
PII	52.0	48.0	2.06
				PIII	61.4	38.6	3.02
PIV	68.3	31.7	4.09
				PV	72.9	27.1	5.11

By result in the table 5 as can be seen, (i) nonreducing sugar PI is hydrolyzed into the glucose of 1mole and the trehalose of 1mole; (ii) PII is hydrolyzed into the glucose of 2mole and the trehalose of 1mole; (iii) PIII is hydrolyzed into the glucose of 3mole and the trehalose of 1mole; (iv) PIV is hydrolyzed into the glucose of 4mole and the trehalose of 1mole; (v) PV is hydrolyzed into the glucose of 5mole and the trehalose of 1mole.

With regard to the enzymatic mechanism of glucoamylase, this non-reducing saccharide has the sugared structure of being set up jointly by α-1,4 key or α-1.6 bond by the trehalose of 1mole or glucose more than the 1mole and 1mole; Nonreducing sugar PI is a kind of nonreducing sugar with 3 glucose polymerization degrees (DP3), is combined with the 1mole trehalose by 1mole glucose and forms; PII, a kind of nonreducing sugar with DP4 is combined with the 1mole trehalose by 2mole glucose and to form; PIII, a kind of nonreducing sugar with DP5 is combined with the 1mole trehalose by 3mole glucose and to form; PIV, a kind of nonreducing sugar with DP6 is combined with the trehalose of 1mole by 4mole glucose and to form; PV non-reducing saccharide with DP7 is combined with the 1mole trehalose by 5mole glucose and to form.This shows, when beta-amylase to act on this nonreducing sugar time-like with the glucoamylase similar fashion, PI and not hydrolysis of PII, and PIII, PIV and PV are hydrolyzed into 1mole maltose and 1mole PI, 1mole maltose and 1mole PII2mole maltose and 1mole PI respectively.

Based on The above results, can draw such conclusion: the enzymatic reaction of this Unreductases produced of saccharide is a kind of intramolecular reaction that does not change used substrate molecule amount, promptly a kind of intramolecular reaction that does not change its glucose polymerization degree.Conclusion is, non-reducing saccharide PI, PII, PIII, PIV and PV be corresponding alpha-glycosyl Thallus Sargassi Pallidi saccharide (Gn-T, wherein symbol G is meant glucosyl residue: symbol " n " is meant one or more integers; Symbol " T " is meant α, α-trehalose residue); Alpha-glucosyl marine alga, α-malt-base trehalose, α-maltotriose glycosyl trehalose, α-maltotetrose base trehalose and α-Fructus Hordei Germinatus pentose base trehalose.

Embodiment 7

Enzymically hydrolyse

With nonreducing sugar PI, PII, PIII, PIV or PV among the embodiment 4 is substrate, (these enzymes all are products of Sigma chemical company with the α-Dian Fenmei sample that derives from Pancreas Sus domestica, the alpha-glucosidase sample that derives from rice or mouse intestines acetone powder, the U.S., St.Louis Blues thirty) handle, every kind of hydrolysate of gained is analyzed to understand its sugar with HPLC and is formed.The enzymatic reaction of α-Dian Fenmei is as follows: the 10mg substrate is dissolved in the phosphoric acid buffer of 1ml 50mM (pH 6.9), gained solution is mixed with 1 unit α-Dian Fenmei, with the gained mixture 37 ℃ of incubations 18 hours.The enzymatic reaction of alpha-glucosidase is to carry out under the condition identical with the enzymatic reaction of α-Dian Fenmei, is damping fluid with 50mM acetate buffer (pH 4.0) just.The enzymatic reaction of mouse intestines acetone powder is to carry out under with the condition identical with the α-Dian Fenmei enzymatic reaction, and what just damping fluid was used is 50mM maleic acid damping fluid (pH 6.0).The situation of forming by α-Dian Fenmei, alpha-glucosidase and mouse intestines acetone powder gained sugar is shown in the table 6,7 and 8.

Table 6

Carbohydrate	The carbohydrate of hydrolysate is formed
						PI	PII	G3	G2	G1
	PI	97.3	0	2.3	0.4						0
PII						0	98.8	0.4	0.8	0
	PIII	61.0	4.8	0	33.0						1.2
PIV						47.2	3.3	40.4	7.5	1.6
	PV	10.2	44.9	35.3	8.6						1.0

Annotate: symbol in the table " G3 ", " G2 " and " G1 " represent bud bud trisaccharide, maltose and glucose respectively.

Table 7

Carbohydrate	The carbohydrate of the hydrolysate of alpha-glucosidase is formed
				Glucose (%)	Trehalose (%)	Other carbohydrate (%)
	PI PII PIII PIV PV	36.5 52.1 61.7 69.5 71.4	63.0 47.6 38.1 30.2 28.3				0.5 0.3 0.2 0.3 0.3

Table 8

Carbohydrate	The composition of the hydrolysate of mouse intestines acetone powder
				Glucose (%)	Trehalose (%)	Other carbohydrate (%)
	PI PII PIII PIV PV	37.2 52.5 62.0 68.8 73.4	62.4 47.1 37.6 30.8 26.5				0.4 0.4 0.4 0.4 0.1

As can be seen from Table 6, sugared preparation PI and PII be not basically by α-Dian Fenmeishuixie, and sugared preparation PIII, PIV then can become low-molecular-weight oligose: PI, PII, trisaccharide maltose, maltose and glucose by α-Dian Fenmeishuixie with PV.

From table 7 and 8 result as can be seen, similar with glucoamylase in the example 6, carbohydrate preparation PI, PII, PIII, PIV and PV are hydrolyzed into glucose and trehalose molecule by alpha-glucosidase and mouse intestines ketone powder.

Marine alga enzyme (the zymin of Sigma chemical company that derives from the pig kidney that in the hydrolysate of gained alpha-glucosidase or mouse intestines acetone powder, adds 1 unit, St.Louis Blues thirty, the U.S.) follow the composition of on HPLC, analyzing this sugar, be hydrolyzed into glucose molecule by trehalase to disclose the trehalose that generates by sugared preparation PI, PII, PIII, PIV and PV.

These observationss are summarized as follows:

(1) this Unreductases produced of saccharide acts on and has a kind of of 3 or 3 above glucose polymerization degrees or many clocks reductibility starch partial hydrolysate can generate the non-reducing saccharide with trehalose structure and don't change its glucose polymerization degree;

(2) nonreducing sugar PV mainly becomes nonreducing sugar PII and trisaccharide maltose by α-Dian Fenmeishuixie, and nonreducing sugar PII is hydrolyzed into 1mole algae sugar and 2mole glucose by glucoamylase.

Based on these results, can draw such conclusion: this Unreductases produced of saccharide is a kind of new enzyme, and it can be converted into a kind of non reducing end unit trehalose structure with the reducing end under neutral unit of reductibility starch partial hydrolysate in the intramolecularly effect.

Embodiment 8

Acute toxicity test

Dd-strain mouse with 7 ages in week is a subjects, it is carried out acute toxicity test for the oral non-reducing saccharide preparation of mouse PI, PII, PIII, PIV or PV.Found that these sugared agent are the lower safe material of toxicity, and, even there is not dead mouse when taking the dosage of maximum possible to them yet.Although be not very accurate, the LD50 value of this carbohydrate preparation is 50g/Kg or higher.

Embodiment 9

Produce Unreductases produced of saccharide by Arthrobacter SPQ36

Similar to embodiment 1, replace Rhizobium SPM-11 (FERM BP-4130) with Arthrobacter SPQ36 (FERM BP-4316) microbial strain culture, by fermentor cultivation 72 hours.The enzymic activity of Unreductases produced of saccharide is approximately 1.2 units/ml in the gained culture.To similar in embodiment 1, test is by the cell suspending liquid of gained culture preparation and the activity of supernatant liquor, and the result is about 0.5 and 0.7 unit/ml respectively.

Embodiment 10

The purification of enzyme

The culture that adopts about 18L to be obtained with embodiment 9 methods is with method purifying similar to Example 2.The result of each purification step of gained Unreductases produced of saccharide makes table 9.

Table 9

Purification step	With enzyme * activity (unit)	Than live (mg of unit protein)	Productive rate (%)
				Cultivate	21,600		100
Supernatant liquor after the cytoclasis	17,500	0.14	81
				With (NH 4)SO 4Dialysis solution after saltouing	15,700	0.41	73
The ion exchange column eluate	12,600	6.5	58
				The drainage column eluate	8,820	98	41
The gel-filtration column eluate	5,290	201	24

Annotate: symbol " * " is represented a kind of Unreductases produced of saccharide.

Analyze its purity with the purifying enzyme preparation that gel-filtration eluate form in the table 9 obtains with embodiment 2 similar electrophoresis methods, find only protein belt, this shows that this kind of enzyme preparation is a kind of enzyme that has the higher degree of single bands of a spectrum when electrophoresis.

Embodiment 11

The characteristic of enzyme

With the molecular weight of the purifying enzyme preparation that obtains among the SDS-PAGE mensuration embodiment 10, the result is about 76,000-86,000 dalton.Determine that with the electric electrophoretic method such as grade similar the PI gained PI of this zymin is about 3.6～4.6 to embodiment 3.With the mode analysis temperature similar and pH influence to zymin to embodiment 3, and the thermostability of enzyme and pH stability.About the result of temperature, pH, thermostability and pH stability illustrates respectively among Fig. 5,6,7 and 8.

As can be seen, the optimum temperuture of this zymin is about 40 ℃ from above-mentioned all figure; Optimal pH is about 6.5-7.0; Thermostability is about 40 ℃; PH stability is approximately 6.0-9.5.

Embodiment 12

The preparation of non-reducing saccharide

The purifying enzyme preparation that adopts embodiment 10 to be obtained is according to the preparation of method experiment non-reducing saccharide and the determining of structure of embodiment 4 and 6.Found that, when it acted on one or more reductibility starch partial hydrolysates with 3 or 3 above glucose polymerization degrees, it was terminal units and the non-reducing saccharide with 3 or 3 above glucose polymerization degrees with the trehalose structure that this kind of enzyme can generate one or more.

Embodiment 13

The characteristic for preparing Unreductases produced of saccharide and this kind of enzyme by known microorganisms

With those be proved can produce this Unreductases produced of saccharide, list in the microorganism in the table 10 in the known microorganisms, cultivated 72 hours at 27 ℃ with fermentor tank with method similar to Example 1, it is 37 ℃ of cultivations (ATCC19420) that a kind of microorganism-M. smegmatics (MycobacteriumSmegma-tis) is only arranged.Every kind of gained culture of 18L is handled gained supernatant liquor (NH with cell breaking plant ₄) ₂SO ₄Saltout, dialyse and use ion-exchange chromatography, to obtain partially purified zymin, its characteristic of subsequent analysis.

The result makes table 10.

Table 10

Microorganism	The enzyme of ion exchange column eluate (unit) alive	Optimum temperuture (℃)	Optimal pH	Thermostability (℃)	PH stability
						Brevibacterium helovolum (ATCC 11822)	2,700	About 35	About 6.5	Up to about 35	About 5.5-11.0
Flavobacterium aquatile (IFO 3772)	216	About 35	About 6.5-6.9	Up to about 35	About 6.0-9.5
						micrococcus luteus (IFO 3064)	1,730	About 35	About 6.4-6.8	Up to about 35	About 6.5-8.0
Micrococcus roseus (ATCC 186)	1,340	About 35	About 6.8-7.2	Up to about 35	About 6.0-11.0
						Curtobacterium citreum (IFO 15231)	1,290	About 30	About 6.4-6.8	Up to about 35	About 6.5-7.8
Mycobacterium smegmatis (ATCC 19420)	358	About 35	About 6.5	Up to about 35	About 6.0-9.0

Terrabacter tumescens (IFO 12960)	1,050	About 35	About 6.5-7.0	Up to about 35	About 6.0-9.5
						Rhizobium Sp. M-11 (FERM BP-4310)	11,300	About 40	About 7.0	Up to about 40	About 6.0-9.0
Arthrobacter Sp.Q36 (FERM BP-4316)	12,600	About 40	About 6.5-7.0	Up to about 40	About 6.0-9.5

Method according to embodiment 12, the partial purification enzyme preparation non-reducing saccharide that employing is made by these known microorganisms, analysis to its structure is found, to similar from the Unreductases produced of saccharide of Rhizobium Sp.M-11, when every kind of zymin acted on one or more reductibility starch partial hydrolysates with 3 or 3 above glucose polymerization degrees, generating with the trehalose structure was the non-reducing saccharide with 3 or 3 above glucose polymerization degrees of terminal units.

Example 14

The partial amino-acid series of Unreductases produced of saccharide

Example 14 (1)

Contain the N-terminal amino acids sequence

A part is obtained purifying enzyme preparation from Rhizobium Sp.M-11 with embodiment 2 methods, the purifying enzyme preparation distill water dialysis that obtains with embodiment 10 methods with a part from Arthrobacter Sp.Q36, and with 80 μ g protein of every kind of preparation of gained as sample, measure it and contain the N-terminal amino acids sequence.This aminoacid sequence is analyzed with " protein determination instrument Model 473A " (Applied Biosytem, a kind of device of Inc., Foster City, U.S.), to understand fully 10 amino-acid residues of its N-end.The N-terminal amino acids sequence that contains of these zymins is shown in Table 11.

Table 11

The source	The partial amino-acid series that contains the N-end
		Rhizobium Sp.M-11	Xie Ansuan (or methionine(Met))-smart amino-Threonine-proline(Pro)-L-Ala-serine-threonine-tyrosine-arginine-leucine-
Arthrobacter Sp.Q36	Methionine(Met)-arginine-Thr-Pro-Xie Ansuan-serine-threonine-tyrosine-arginine-leucine

As can be seen from Table 11, be from the partial amino-acid series that contains the N-end of the zymin of Rhizobium Sp.M-11 and difference from the partial amino-acid series that contains the N-end of Arthpobacter Sp.q36: the former-terminal amino acid residue is Xie Ansuan or methionine(Met), and the latter is a methionine(Met), but they have 8 to be identical in 10 amino-acid residues being analyzed.More particularly, they are being on all four in the terminal sequence that plays the arginine of second amino-acid residue and three amino-acid residues compositions between the proline(Pro) of terminal the 4th amino-acid residue of N-of N-; And the sequence of forming at the five amino acid residue between N-end the 6th a propylhomoserin residue L-Serine and the tenth amino-acid residue L-leucine also is the same.This illustrates that the sequence that contains the N-end of these zymins is that part is identical: X ₁-arginine-Thr-Pro-X ₂-serine-threonine-tyrosine-arginine-leucine (" X wherein ₁" refer to Xie Ansuan or methionine(Met). " X ₂" refer to L-Ala or Xie Ansuan).

Embodiment 14 (2)

The internal portion aminoacid sequence

The purifying enzyme preparation that a part is obtained with embodiment 2 methods from Rhizobium Sp.M-11, dialyse with the Tris-HCL damping fluid (pH 9.0) of 10mM with the purifying enzyme preparation from Arthrobacter Sp.Q36 that embodiment 10 methods obtain with a part, products therefrom is used the concentration that is diluted to about 1mg/ml with a kind of damping fluid of new preparation respectively.In the branch styles such as 1ml of gained solution, add 10 μ g " lysyl endopeptidase " (Wako Pure Chemical Industries, the product of Ltd., Japan, Tokyo), and react 22 hours to generate peptide at 30 ℃.The gained mixture is handled with RPLC (reversed-phase HPLC), and is poor with isolated peptides.The reversed-phase HPLC device that is used to separate from the peptide of the zymin of Rhizobium Sp.M-11 is diameter 4.6mm, long 250mm " CAPCELLPAK C18 " (product of Shisendo company limited, Japan, Tokyo); Flow velocity 0.6ml/ branch; Temperature is an envrionment temperature; Elution time 60 minutes; With the gradient of concentration between 16-48v/v% that contains 0.1v/v% trifluoroacetic acid and acetonitrile, linear gradient solution is elutriant.Be used in the reversed-phase HPLC separation from the device of the zymin of Arthobacter Sp.Q36 and " μ-Bondapak C18 post " (Waters ChromatographyDiv. that condition is diameter 2.1mm, long 150mm, Millipore Corp., Milford, USA); Flow velocity 0.9ml/ branch; Temperature is an envrionment temperature; Elution time 60 minutes; With the concentration that contains 0.1v/v% trifluoroacetic acid and acetonitrile gradient, linear gradient eluant solution at 30-55v/v%.The peptide of the wash-out from the post of the absorbance detection by monitoring the 210nm wavelength.After the peptide class of separating and depositing, being recovered to the residence time from the zymin from Rhizobium Sp.M-11 is respectively three kinds of R37 by name, R40 of 37,40,42, the peptide of R42, being recovered to the residence time from the zymin from Arthrobacter Sp.Q36 is respectively three kinds of A17 by name, A22 of 17,22 and 40 and the peptide of A40, the resulting peptide of vacuum-drying subsequently, and it is dissolved in the five equilibrium solution of 200 μ l of 0.1～0.5% acetonitrile with different concns.The sample of thus obtained every kind of peptide is analyzed the amino-acid sequence of its 10 amino-acid residues with protein sequencer.The internal portion amino-acid sequence of being analyzed is shown in Table 12.

Table 12

The source	Peptide	The internal portion aminoacid sequence
			Rhizobium Sp. M-11	R37	Gly-Val-Glu-Asp-Thr-Ala-Phe-Phe-Arg-Tyr-
R40	Leu-Val-Glu-Leu-Thr-Met-Pro-Gly-Val-Pro-
		R42		Glu-Glu-Arg-Gly-Ser-Pro-Tyr-Ala-Val-Ala-
Arthrobacter Sp.Q36	A17				Gly-Val-Glu-Asp-Thr-Ala-Phe-Phe-Arg-Tyr-
		A22	Leu-Val-Glu-Leu-Thr-Met-Pro-Gly-Val-Pro-
	A40			Glu-Gly-Arg-Glu-Ser-Arg-Tyr-Ala-Glu-Ala-

As can be seen from Table 12, in full accord from the aminoacid sequence of the partial amino-acid series of the peptide R37 of the zymin of Rhizobium Sp.M-11 and peptide A17, and the aminoacid sequence of peptide R40 and peptide A22 is in full accord.It is identical in 10 amino-acid residues being analyzed 7 residues being arranged with regard to peptide R42 and A40; Be that peptide R42 has the identical aminoacid sequence of part: Glu-Gly-Arg-X with A40 ₃-Ser-X ₄-Tyr-Ala-X ₅-Ala (" X wherein ₃" refer to Gly or Glu: " X ₄" refer to Pro or Arg: " X ₅" refer to Val or Glu).

Embodiment A subsequently illustrates this non-reducing saccharide, contain the lower carbohydrate of the reductibility of this sugar and the preparation of trehalose; The Embodiment B explanation contains the composition of one or more these carbohydrates and trehalose.

Example A-1

Annotate according to side described in the embodiment 1, with the microbial strain culture of Rhizobium Sp.M-11 (FERMBP-4130) by kind in nutritional medium, and with a fermentor cultivation 36 hours.After cultivating end, the gained culture is filtered, remove cell with the SF-membrane filtration, obtain about 18L filtrate, contain the concentrated solution that this carbohydrate of 17.7 units/ml generates enzyme with the UF-membrane concentration into about 1L then.

6% yam starch suspension (d.s.b.) is added Thermogelling, be adjusted to pH 4.5 and 50 ℃, with alienation amylase (Hayashibara BiochemicalLaboratories Inc., product Okayama, Japan) with 2, the mixed of 500 units/gram starch, and enzymatic reaction 20 hours.The pH of gained mixture transfers to 6.0 120 ℃ of autoclavings 10 minutes, be cooled to 45 ℃, mix also enzymatic reaction 24 hours with " Termamyl 60L " (a kind of α-Dian Fenmei of selling, Copenhagen, Denmark) of 150 units/g starch by Novo Industri A/S.

Reaction mixture 120 ℃ of autoclavings 20 minutes, is cooled to 45 ℃, mixes enzymatic reaction 96 hours with above-mentioned Unreductases produced of saccharide with the consumption of 1 unit/g starch.The gained mixture kept 10 minutes at 95 ℃, and cooling is also filtered.Gained filtrate is with the ordinary method decolorizing with activated carbon, and with the ion exchange resin desalting and purifying of H-shape or OH-shape.The gained solution concentration is become 70% syrup, and productive rate is about 91% (d.s.b.).

This product shows the reducing power of DE18.8, and contains 8.3%PI, 5.5%PII, 37.7%PIII, 1.4%PIV and 1.3%PV (d.s.b.).This product has moderate high quality sugariness, and suitable viscosity and moisture-retaining capacity.Therefore, it suitably can be used as sweetener, odorant, quality booster, stablizer and the weighting agent of food, makeup and medicine.

Embodiment A-2

Institute's sugar soln that obtains in the embodiment A 1 adopted as feed liquid " XT-1016 (Na is housed ⁺-shape, the polymerization degree 4%) " the post fractional separation of (a kind of basic metal storng-acid cation exchange resin, organic chemistry Industrial Co., Ltd in Tokyo produces, Tokyo, Japan).This method is as follows: with the resin stainless steel column of interlayer that 4 internal diameters are 5.4cm of packing into, and 4 posts are serially connected make the total thickness of gel bed reach 20m.Pillar is heated in the post 55 ℃ of temperature, the saccharide solution of filling 5v/v% keeps 55 ℃ temperature simultaneously, hot water by 55 ℃ of injections in post carries out fractional separation to sugar soln, removes the cut that is rich in glucose and maltose, reclaims the cut that is rich in nonreducing sugar subsequently.With being rich in cut merging, purifying, concentrated, the also pulverizing of vacuum-drying of nonreducing sugar, to obtain to contain the powder of non-reducing saccharide, productive rate 61% (d.s.b.).

These goods show the reducing power of DE5.7, contain 9.3%PI, 7.4%PII, 55.50%PIII, 2.1%PIV and 1.9%PV (d.s.b.).Similar with product among the routine A-1, this product also has moderate high quality sugariness, and the moisture holding capacity of suitable viscosity, therefore makes it can suitably be used as sweeting agent, odorant, quality booster, stablizer and the filler of food, makeup and medicine.

Example A-3

W-Gum suspension (d.s.b.) and CaCO with 33% ₄Mix the ultimate density that reaches 0.1% (d.s.b.), the gained mixture is transferred to pH6.5, and sneak into " Teramyl 60L " (a kind of α-Dian Fenmei of producing by NoVo Industri A/S with the consumption of every gram starch 0.2% (d.s.b.), Copenhagen, Denmark). 95 ℃ of enzymatic reactions 15 minutes.Reaction mixture is at 120 ℃ of autoclavings, 10 side's clocks, being cooled to 55 ℃. ratio and maltose with 5 units of every gram starch generate amylase (Hayashibara BiochemicalLaboratories Inc. product .Okayama, Japan) mix enzymatic reaction 6 hours.The gained mixture mixes with " α-Dian Fenmei 2A " (Ueda Chemical Co.Ltd. produces, Osaka, Japan) with the ratio of 30 units of every gram starch, and 65 ℃ of enzymatic reactions 4 hours.Reaction mixture is cooled to 45 ℃ 120 ℃ of enzymatic reactions 10 minutes, mixes with the Unreductases produced of saccharide that obtained among the routine A-1 with the ratio of every gram starch 2 units, and enzymatic reaction 64 hours.The gained mixture kept 10 minutes at 95 ℃, and cooling is also filtered, and obtains filtrate, make the decolouring of its filtrate with ordinary method with activated carbon, make its desalting and purifying, concentrated subsequently gained solution with the ion exchange resin of H-and OH-shape, obtain 70% syrup, productive rate is about 90% (d.s.b.).

Products obtained therefrom shows the reducing power of DE10.5, and contains 3.7%PI, 43.7%PII, 1.2%PIII, 1.1%%PIV and 0.6%PV (d.s.b.).This product has moderate high-quality sugariness, and suitable viscosity and moisture holding capacity, therefore makes it can suitably be used as sweeting agent, odorant, quality improving agent, stablizer and the weighting agent of food, makeup and medicine.

Example A-4

Sugar soln by the resulting liquid as a supplement of embodiment A-3 method carries out column chromatography according to embodiment A-2 method, and different is to adopt " 50W-X4 (Mg ⁺⁺-shape) " (a kind of storng-acid cation exchange resin, Dow chemical Co. produces, Midland.Michigan, the U.S.) is as separation resin, with content that improves nonreducing sugar PII (DP4) and the cut that obtains to be rich in the PII non-reducing saccharide.This cut is purified, concentrated and spraying drying, and to obtain to be rich in the powder of non-reducing saccharide, productive rate is about 40% (d.s.b.).

This product contains the nonreducing sugar of 8.5%PI, 68.0%PII and 1.4%PIII (d.s.b.), and shows DE3.5, and does not have basically or lower reducing power.Similar to the product in the embodiment A-3, this product has moderate high-quality and sugariness.And suitable viscosity and moisture holding capacity, this makes it can suitably be used as sweeting agent, odorant, quality improving agent, stablizer and the weighting agent of food, makeup and medicine.

Embodiment A-5

(Hayasibara BiochemicalLaboratories Inc.'s Fructus Hordei Germinatus pentose aqueous solution to 20% produces, Okayama, Japan) Unreductases produced of saccharide that adds the embodiment A-1 method preparation of 1.0 units/gram Fructus Hordei Germinatus pentose amounts in, and 45 ℃ of enzymatic reactions 48 hours.The result of this enzymatic reaction is converted into nonreducing sugar PIII with the Fructus Hordei Germinatus pentose of about 93% (d.s.b.).95 ℃ of insulations 10 minutes, cooling was also filtered with reaction mixture, obtained filtrate and with the ordinary method decolorizing with activated carbon, used the ion exchange resin desalination of H-and OH-shape also to concentrate.In order to improve the content of irreducibility PIII (DP5), the gained enriched material is so that similarly column chromatography, employing basic metal storng-acid cation exchange resin separate the cut that obtains being rich in PIII with embodiment A-2.This cut is purified, concentrated and spraying drying, and to obtain to contain the powder of high purity non-reducing saccharide, productive rate is about 55% (d.s.b.).

This product contains 99.0% PIII nonreducing sugar (d.s.b.), and shows and be lower than 0.2 DE value, and its reducing power is extremely low.This product has lighter sugariness, and can suitably be used as sweeting agent, odorant, quality improving agent and the stablizer of food, makeup and medicine.

Example A-6

" PINE-DEX#4 " (a kind of starch partial hydrolysate that MatsutaniChemical Inc. produces with 40 parts of weight, Tokyo, Japan) be dissolved in the water of 60 parts of weight, and gained solution is heated to 45 ℃, transfer to pH6.5, every gram starch partial hydrolysate is mixed with the Unreductases produced of saccharide by the preparation of embodiment A-1 method of 1 unit, and enzymatic reaction 96 hours keeps 45 ℃ temperature and pH6.5 simultaneously.Subsequently, reaction mixture is heated to 100 ℃ to be kept 10 minutes, so that remaining enzyme deactivation, be diluted to the concentration of about 20% (d.s.b.), with " GLUCOZYME " of every gram starch partial hydrolysate and 10 units (by Nagase Biochemicals, the glucoamylase that Ltd. produces, Kyoto, Japan), enzymatic reaction 40 hours, postheating gained mixture makes remaining enzyme deactivation.Thus obtained mixture is with the ordinary method decolorizing with activated carbon, and the spent ion exchange resin desalination is concentrated into about 60% concentration (d.s.b.).

Thus obtained sugar soln contains 29.5% trehalose (d.s.b.).This sugar soln carries out column chromatography according to the method for embodiment A-2, and different is with " CG6000 (Na ⁺-shape) " (a kind of storng-acid cation exchange resin, by Japanese Organo Co., Ltd. produces, Tokyo, Japan) as separation resin, then reclaims and is rich in the trehalose cut.This cut contains about 90% trehalose (d.s.b.).This cut is concentrated solution into about 75%, put into crystallizer then, and as the having the water crystallization trehalose to mix and progressively cool off of about 2% (.d.s.b.) of crystal seed, obtain degree of crystallinity and be about 45% massecuite.This massecuite is by being contained in nozzle on the spray tower with 150Kg/cm ²Press atomization.In spray step, massecuite is dried synchronously by blow 85 ℃ the warm air that comes from the spray tower top, spray tower is collected and progressively left to the conveying belt that the crystal powder of gained is knitted by the wire screen that is contained in tower bottom, and general 40 ℃ air-flow is upwards blown over wire screen simultaneously.The gained crystal powder is injected in the aging tower and wore out 10 hours, to finish crystallization and drying.Reclaim powdery subsequently the water crystallization trehalose is arranged.

This product does not show water absorbability basically and has gratifying handlability, thereby makes it can suitably be used as sweeting agent, odorant, quality booster, stablizer and the weighting agent of food, makeup and medicine.

Embodiment A-7

That the yam starch of 1 part of weight and 6 parts of weight are contained 0.01% " NEO-SPIIASE " is (a kind of by Negase Biochemicals by stirring, Ltd. the α-Dian Fenmei of Chu Pining, Kyoto, Japan)/water of gram starch mixes, gained suspension is adjusted to pH 6.0, be heated to 85-90 ℃, gelation simultaneously and liquefaction under this temperature.Subsequently, products therefrom is heated to 120 ℃ at once and keeps 5 minutes to keep the DE value below 1.0, be cooled to 55 ℃ rapidly, be adjusted to pH 7.0, every gram starch and 150 units " PullulANASE (EC3.2.1.41) " (by HayashibaraBiochemical Labovatories, a kind of enzyme that Inc. goes out, Okayama, Japan) and the described maltose of the embodiment A-3 of 8 units generate the enzyme mixing, enzymatic reaction is 36 hours under 7.0,50 ℃ of conditions of pH.

With 120 ℃ of reaction mixture autoclavings 10 minutes, be cooled to 45 ℃, ratio with every gram starch 2 units is mixed with the Unreductases produced of saccharide for preparing from Brevibacteriumhelovolum ATCC 11822 by method among the embodiment 13, and carries out enzymatic reaction 64 hours.This reaction mixture be heated to 95 ℃ 10 minutes, cooling is also filtered.The gained filtered liquid is decoloured in a usual manner with gac, with H-and ion exchange resin desalination of OH-shape and purifying.Obtaining a kind of powdery non-reducing saccharide, yield is about 90%, d.s.b. with gained solution concentration and spraying drying.This product shows a kind of DE11.2, contain 2.9%PI, 61.5%PII, and 0.8%PIII, (d.s.b.), and have medium high-quality sweet taste, and satisfied viscosity and moisture-retaining capacity, and these characteristics make this product to be used as the sweeting agent in the composition of food, makeup and medicine, seasonings, quality improving agent and stablizer aptly.

Embodiment A-8

The kind bacterium culture of a kind of microorganism Arthrobacter Sp.Q36 (FERM BP-4316) is inoculated in a kind of nutritional medium, and in a fermentor tank, cultivated 72 hours according to the method among the embodiment 9.The gained culture is centrifugal to remove cell, again with a kind of UF film with 10 times of gained supernatant concentration, a kind of enzyme solution that contains 15.2 units that have an appointment/ml Unreductases produced of saccharide of the present invention of acquisition.

Method according to embodiment A-3. (NoVo IndustriA/S produces with the α-Dian Fenmei sample, Copenhagen, Denmark), maltose generates amylase sample (HayashibaraBiochemical Laboratories, Inc. produce Okayama, Japan) and α-Dian Fenmei sample (Ueda Chemical Co., Ltd, produce Osaka, Japan) handle 30% W-Gum suspension.The gained mixture at 120 ℃ of autoclavings, is cooled to 45 ℃, every gram starch is mixed by the Unreductases produced of saccharide of method for preparing with 2 units, and enzymatic reaction 64 hours.Reaction mixture was kept 10 minutes so that remaining enzyme deactivation at 100 ℃.According to the method for embodiment A-6, gained solution is handled with glucoamylase (Nagase Biochemicals.Ltd., produce, Kyoto, Japan), decolouring, and desalination also is condensed into about 60% solution.Thus obtained sugar soln contains the trehalose of have an appointment 25% (d.s.b.).This sugar soln is separated by the column chromatography that adopts storng-acid cation exchange resin, obtains to be rich in the cut of trehalose.Merge these cuts, and putting into container decompression infusion, to become moisture content be 4.0% syrup.This syrup is put into crystallizer, and sneak into as the inorganic crystal trehalose 1% (syrupy relatively d.s.b.) of planting product, subsequently 95 ℃ of crystal anhydrous crystalline trehaloses 5 minutes, stirring simultaneously.With products therefrom transfer in the aluminum container 100 ℃ aging 6 hours so that it forms agglomerate.The gained agglomerate is pulverized by cutting machine, and carries out fluidised bed drying, is about 0.3% powdered anhydrous crystalline trehalose to obtain water content.

This product can suitably be used as the dewatering agent of water substance such as food, makeup and medicine and material and intermediate, and can be used as the sweeting agent high-quality, that sugariness is moderate.

Embodiment B-1

Sweeting agent

In the powder that is rich in non-reducing saccharide that usefulness embodiment A-4 method of a weight obtains, evenly sneak into " α G sweet " (alpha-glycosyl stevioside of 0.01 part of weight; Toyo Sugar Refining Co.; Ltd. product; Tokyo; Japan) and the L-aspartyl-L-phenylalanine methyl esters (AjinomotoCo. of 0.01 part of weight; Ltd. product), this mixture is packed into granulator obtains granular sweeting agent.These goods have gratifying sugariness, and it is high 2 times that it increases sweet energy force rate sucrose, and heat only is 1/2 of a sucrose.

This product has gratifying stability, when mixing with the higher sweetener of sugariness, it can influential can not the making it again of the latter do not decomposed, therefore, can those be limited to the low-heat sweetener of the low-heat food that low-heat intake person eats used as specializing in obese person and diabetic subject.

When tooth carries microorganism when it is worked, this product seldom produces acid and insoluble glucan, and this makes the food that it can be used to take care of one's teeth.

Example B-2

Boiled sweet

With 55% sucrose solution of 100 parts of weight with containing of 30 parts of weight useful embodiment A-3 method gained non-reducing saccharide syrup mix, the gained mixture is heated in a vacuum be concentrated into moisture content and be lower than 2%.This concentrated solution mixes with the lemon flavouring and the tinting material of 1 part of weight citric acid and capacity, and the gained mixture is shaped with ordinary method, obtains desired product.

This product is a kind of high-quality hard candy, has gratifying taste and chews performance, and do not worry distortion and cause crystallization of sucroseization.

Example B-3

Gum

To fusing, the water crystallization marine alga Icing Sugar that has of the sucrose of products therefrom and 4 parts of weight and the usefulness embodiment A-6 method gained of 3 parts of weight mixes, and further mixes with the spices and the tinting material of capacity with the gummy basic thermoplastic of 3 parts of weight.The gained mixture rolls with ordinary method and stirs, and is shaped and packing, with the product that need to obtain.

This product be a kind of have gratifying knit with taste the mouth balosam.

Example B-4

Increase sweetened condensed milk

The syrup that closes non-reducing saccharide that usefulness embodiment A-1 method of 3 parts of weight is obtained and the sucrose dissolved of 1 part of weight are in the fresh milk of 100 parts of weight, gained solution is by a flat heater heats sterilization, and be condensed into 70% solution, subsequently the product sterile packed is become desired product.

This product has moderate sugariness and gratifying taste, can suitably be used as the seasonings of infant food, fruit, coffee, cocoa and tea.

Embodiment B-5

The beverage that contains milk-acid bacteria

With usefulness embodiment A-2 height that method obtains of the skimmed milk of 175 parts of weight, 80 parts of weight contain the powder of nonreducing sugar amount and 50 parts of weight in Japanese patent application publication No.: 281, the powder of disclosed high lactosucrose (Lactosucrose) content is dissolved in 1 in 795/92, in the water of 200 parts of weight, to get solution in 65 ℃ of heating sterilization in 30 minutes, be cooled to 40 ℃, with mixed 37 ℃ of cultivations 8 hours that are incorporated in of the milk-acid bacteria as starter of ordinary method and 30 parts of weight, obtain containing the beverage of milk-acid bacteria.

This product is a kind of beverage that contains milk-acid bacteria, has gratifying taste and fragrance.But this growth that contains the product stable maintenance milk-acid bacteria of oligosaccharides and promote bifidus bacillus.

Example B-6

Fruit juice pulvis beverage

The powder that be rich in non-reducing saccharide, the sucrose of 10 part weight, the Citric Acid, usp, Anhydrous Powder of 0.65 part weight, the oxysuccinic acid of 0.1 part weight, the L-xitix of 0.1 part weight, the Trisodium Citrate of 0.1 part weight, the dextran of 0.5 part weight and the spices powder of capacity of 33 parts of weight by spraying drying the orange juice powder for preparing and 50 parts of weight that obtained with embodiment A-2 method mixed under agitation condition.The gained mixture is pulverized, sent into the interior granulation of fluidised bed granulator 30 minutes, spray with the syrup that contain non-reducing saccharide of embodiment 1 method obtain, blow 40 ℃ air to content simultaneously as caking agent to it.Obtaining particle is weighed and packed, obtain desired product.

This product contains the orange juice of 30% (d.s.b.).This product all is stable in quite long period. can not produce bad taste and smell.

Embodiment B-7

Custard cream

With the W-Gum of 100 parts of weight, 100 parts of syrup that close non-reducing saccharide that weight is obtained by embodiment A-3 method, the maltose of 80 parts of weight, the salt uniform mixing of the sucrose of 20 parts of weight and a weight.The gained mixture mixes with the egg of 280 parts of weight, and adds the milk that boils of 1000 parts of weight gradually.The mixture that obtains thus of heating does not stop to stir simultaneously, stops heating when the W-Gum complete gelationization in this mixture makes all the elements thing be translucent shape, with the postcooling products therefrom and add an amount of vanilla flavor.With the gained mixture weigh, injection moulding and the packing, to obtain desired product.

This product has slick surface and gloss, also has moderate taste and sugariness.

Embodiment B-8

An (beans paste)

It is ripe to be with the red bean of 10 parts of weight that raw material adds poach with ordinary method, removes convergency and the roughness of bean or pea subsequently, and water-soluble impurity, obtains " adzuki-an " of about 21Kg.Add the syrup that contains non-reducing saccharide that the sucrose of 14 parts of weight, 5 parts of weight obtains with embodiment A-3 method and the water of 4 parts of weight in products therefrom, the gained mixture is boiled boil, mixes with a spot of salad oil, careful stirring is in order to avoid the stickup bean or pea.Like this, obtained the ideal product that output is about 35Kg

This product can not take place to have gratifying taste and fragrance because of fading due to boiling, and this makes and can be used as the material an that beans sauce bread, beans sauce filling bread, glutinous rice flour dumplings, beans sauce filling wafer, nectar and ice river in Henan Province are insulted.

Embodiment B-9

Bread

The sugar of the yeast of the wheat-flour of 100 parts of weight, 2 parts of weight, 5 parts of weight, 1 part of weight are mixed and stirred with ordinary method and water by the powder that contains non-reducing saccharide of embodiment A-7 method acquisition and the inorganic Yeast food of 0.1 part of weight, 26 ℃ of fermentations 2 hours, further aging 30 minutes, bake products therefrom subsequently.

This product is a kind of high quality bread, has gratifying color harmony turgidity, and gratifying elasticity and moderate sugariness.

Embodiment B-10

Ham

In the ham sliced meat of 1000 parts of weight, add the salt of 15 parts of weight, the KNO of 3 parts of weight ₃And grind evenly, the gained sliced meat are piled up and in refrigerating chamber, placed and spend the night.Subsequently, earlier with the gained sliced meat by the salt of the water of 500 parts of weight, 100 parts of weight, the KNO of 3 parts of weight ₃, be placed on refrigerating chamber in the salts solution formed of the powder that contains nonreducing sugar that obtains with embodiment A-7 method of 40 parts of weight and an amount of peppermint and soaked 7 days, then with the ordinary method cold water flush, wrap up, smoke, boiling, cooling and packing, to obtain desired product.This product is a kind of High-quality ham with ideal tone, taste and fragrance.

Embodiment B-11

The powdery peptide

With 40% " Hinute S " (a kind of peptide solution of human consumption soybean, Fuji Oil CO. produces, Tokyo, Japan) mix with the powder that contains the water crystallization trehalose by the preparation of embodiment A-6 method of 2 parts of weight, the gained mixture is put into plastic containers, vacuum-drying under 50 ℃ of temperature is pulverized and is obtained the powdery peptide.This product has the material that gratifying taste and fragrance can be suitably insulted as confectionery such as premixture, sorbet and ice river in Henan Province, also can be used as the material of the treatment nutritive medium of infant food, oral and intubate feeding form.

Embodiment B-12

Yolk powder

At 60-64 ℃ of thermal sterilization, gained liquid mixes both with the ratio of the powdered anhydrous crystalline trehalose that 4 parts of weight of this liquid of 1 part of weight are made by embodiment A-8 method to the yolk that is made by bright egg with flat well heater.Institute is transferred in the container to mixture, and placing spends the night makes its caking, and the anhydrous crystal trehalose has also changed into the water crystallization trehalose simultaneously.Thus obtained agglomerate is pulverized with knife mill, obtains yolk powder.

This product can be suitably as confectionery such as premixture, sorbet, the ice river in Henan Province is insulted and the material of emulsifying agent, also can be used as the material that infant food, oral and intubate are fed liquid.This product also can be used as skin refining oil and hair restorative.

Example B-13

The makeup emulsifiable paste

Polyoxyethylene glycol-stearate, the glyceryl monostearate of 5 parts of weight, self-emulsifying with 2 parts of weight, the powder that is rich in non-reducing saccharide of 2 parts of weight embodiment A-2 method acquisitions, the alpha-glycosyl violaguercitrin of 1 part of weight, the Albolene of 1 part of weight, three-2 ethyl hexanoic acid glyceryl ester of 10 parts of weight, and an amount of sanitas is with the ordinary method heating for dissolving.Gained solution mixes with the 1,3 butylene glycol of the L-lactic acid of 2 parts of weight, 5 parts of weight and the purified water of 66 parts of weight, and the gained mixture mixes by homogenizer emulsification and with an amount of spices, to obtain the makeup emulsifiable paste.

This product shows the active of antioxidant and has advantages of higher stability.This makes it can suitably be used as high-quality sunscreen, skin rejuvenator and skin whitener.

Embodiment B-14

Solid medicine

(produce with the ordinary method natural human interferon-α preparation of in the post that will fix anti-human interferon-Alpha antibodies, annotating by Cosmo Bio., Tokyo, Japan), with adsorptive hindrance element-α, and to inject with the bovine serum albumin be stablizer and damping fluid, removes unnecessary albumin subsequently.After this, with the physiological saline wash-out interferon-' alpha ' that contains the high purity non-reducing saccharide that 5% (d.s.b) obtain with embodiment A-5 method, change the pH of physiological saline simultaneously.

The gained elutriant is carried out membrane filtration.Gained filtrate is with " the FINETOSE of 20 times of volumes ^" (a kind of anhydrous crystal maltose of producing by Hayashibara Shoji Znc.; Okayama, Japan) dehydration, pulverize the product of dehydration subsequently; and be made into every tablet of tablet that contains the natural human interferon-α of 150 units that have an appointment, every heavy 200mg with pelleter.

It is oral by patient that this product can be used as lozenge, and dosage is 1-10 sheet/adult/sky, and can suitably be used for the treatment of disposition disease, transformation reactions, rheumatosis, diabetes and malignant tumour.More particularly, this product can suitably be used as the therapeutical agent of acquired immune deficiency syndrome (AIDS) (AIDS) and hepatitis, and this type of patient's sickness rate obviously rises.Because this nonreducing sugar and anhydrous crystal maltose are mixed in this product stablizer as natural human interferon-α, so even it actively also can keep the long period at ambient temperature.

Embodiment B-15

Sugar coated tablet

Rough tablet with heavy 150mg is a core, it is 200 that the powdery of using embodiment A-6 method by 40 parts of weight to obtain has water crystallization trehalose, 2 parts of weight average molecular weights, the solution dressing that the titanium dioxide of the talcum of the water of 000 dextran, 30 parts of weight, 25 parts of weight and 3 parts of weight is formed reaches 230mg until gross weight.The products therefrom further dressing of forming by the water of the dextran of water crystallization trehalose, 1 part of weight and 34 parts of weight by same a kind of freshly prepd powdery of 65 parts of weight of solution, and use the liquid wax glazing, obtain having the sugar coated tablet of gratifying gloss and outward appearance.This product has higher shock resistance, and can keep it high-quality for a long time.

By foregoing as can be seen, this new Unreductases produced of saccharide can change into non-reducing saccharide with gratifying high yield with reductibility starch partial hydrolysate under comparatively gentle enzymatic reaction condition, and can not change the polymerization degree of the glucose of reductibility starch partial hydrolysate.This non-reducing saccharide is easy to separate and purifies, and contains the lower carbohydrate of the reductibility of this sugar and have gratifying stability, quality and moderate sugariness by the trehalose that this sugar is made.When oral, this product can be absorbed by health and as the energy.This non-reducing saccharide, contain the lower carbohydrate of the reductibility of this sugar and the trehalose made by this sugar can be suitably changes agent, stablizer and weighting agent as sweetener, odorant, the quality of composition such as food, makeup and medicine.

Therefore, the invention provides a kind of new technology of producing non-reducing saccharide with technical scale and low expense, this sugar is difficult for obtaining, although its demand is very big.This method is a this nonreducing sugar of feedstock production with this cheapness of reductibility starch partial hydrolysate, the rich in natural resources by starch preparation, and contains lower carbohydrate of the reductibility of this sugar and the trehalose of being made by this sugar.The present invention for starch-, enzyme-and these fields of bio-science great effect is arranged; And for other field, particularly foodstuffs industry, cosmetic industry and medicine industry, and forestry, fishery, agricultural, livestock industry and chemical industry all have great effect.Therefore, the present invention is immeasurable to the influence in these fields.

Although illustrated and be considered to preferred embodiment of the present invention at present; but, should be understood that, can make various changes to it; therefore, all these type of improvement in the protection domain that is limited in the appended claims all are considered as dropping within the spirit and scope of the invention.

Claims (2)

1. one kind prepares crystalline alpha, and the method for α-trehalose comprises step

(a) the concentrated α, the water-based sugar soln thing of α-trehalose of containing;

(b) in gained water-based enriched material, do not use any alcohols and crystalline alpha, α-trehalose; With

(c) separation and collection crystalline α, α-trehalose.

2. the process of claim 1 wherein that the enriched material of water-based described in the step b) has the solids concn of 65-90w/w%, and described α, the content of α-trehalose in described water-based enriched material is in dried solids 65w/w% at least.

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