CN1685056A - Production method for iturin A and its homologues - Google Patents

Production method for iturin A and its homologues Download PDF

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CN1685056A
CN1685056A CNA03822707XA CN03822707A CN1685056A CN 1685056 A CN1685056 A CN 1685056A CN A03822707X A CNA03822707X A CN A03822707XA CN 03822707 A CN03822707 A CN 03822707A CN 1685056 A CN1685056 A CN 1685056A
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homologue
iraq
actinomycin
iraq subtilis
subtilis actinomycin
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CN100357448C (en
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米田正
北国英一
古谷和男
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Resonac Holdings Corp
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Showa Denko KK
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Abstract

(1) A method for producing iturin A and its homologues by cultivating a Bacillus microbe that produces iturin A and its homologue in a medium containing 2 mass % or more of soybean pulverisate or its extract as a nitrogen source to allow the microbe to accumulate iturin A and its homologue in the medium at a concentration of 1.5 g/L or more, (2) a culture containing iturin A and its homologue accumulated by the method, (3) a solid obtained from the culture and (4) a method of using the culture or the solid, are provided.

Description

The production method of iraq subtilis actinomycin A and homologue thereof
The mutual reference of related application:
The application is according to the rules of 35 U.S.C. the 111st (a) joint, require under 35 U.S.C. the 111st (b) joint clause in the right of the U.S. Provisional Application series number 60/413,755 of application on September 27th, 2002, it follows 35 U.S.C. the 119th (e) (1) joint.
Technical field
The present invention relates to belong to the microorganisms iraq subtilis actinomycin A of bacillus and the method for homologue thereof by cultivating in the liquid medium within, described liquid nutrient medium comprises soybean or its extract as iraq subtilis actinomycin A and the homologue thereof of nitrogenous source with accumulation high density in the liquid medium within.The invention still further relates to the culture that comprises iraq subtilis actinomycin A and homologue thereof, relate to the solid matter that comprises iraq subtilis actinomycin A and homologue thereof that obtains by dry this culture, and relate to their application method.
Background technology
The known routinely microorganism that belongs to bacillus particularly subtilis (Bacillus subtilis) produce iraq subtilis actinomycin A and homologue thereof (referring to, Besson etc. for example, Journal of Antibiotics, 1978,31 volumes, the 284-288 page or leaf).
Iraq subtilis actinomycin A and homologue thereof refer to have the structure of following formula shown 1 representative and have the active one group of compound of antimycotic particularly anti-plant pathogenic microorganisms, so they are as preventing that the good component of Plant diseases from having caused people's attention.
Figure A0382270700041
(the R representative has the straight or branched alkyl of 3 to 10 carbon atoms).
The example that is used to produce the method for iraq subtilis actinomycin A and homologue thereof comprises that those are described in the method among JP-A-59-212416, the JP-A-7-143897 (U.S. Patent number 5,470,827 and 5,494,809) etc.
Yet the output that bacillus micro-organism produces iraq subtilis actinomycin A and homologue thereof is too low so that can not be applied to plant-scale production.Therefore, many investigators are devoted to improve the iraq subtilis actinomycin A that produced and the output of homologue.
Hatada etc. disclose and have been used for by support the method for subtilis (Bacillus subtilis) NA-apb-1 bacterial strain generation based on the material of iraq subtilis actinomycin A in the good air culture of nutritional medium (JP-B-63-20519).Nitrogenous source, peptone, meat extract, yeast extract, casein hydrolysate, corn steep liquor, gluten powder and inorganic nitrogen-sourced and described by in the substratum that comprises peptone, meat extract and yeast extract, cultivating in 30 liters of culturing filtrates that this bacterial strain obtains and obtain 270 milligrams of iraq subtilis actinomycin As in the disclosure, have been provided.Sandrin etc. disclose and can obtain 480 mg/litre iraq subtilis actinomycin As and homologue (Biotechnology and Applied Biochemistry, nineteen ninety, 12 volumes, 370-375 page or leaf) thereof in as the artificial medium of nitrogenous source containing proline(Pro).
Hbid etc. disclose in comprising the substratum of peptone the method (Applied Biochemistry andBiotechnology,, 57/58 volume, 571-579 page or leaf in 1996) that iraq subtilis actinomycin A and homologue output thereof reach 1,388 mg/litre that obtains.Phae etc. disclose the method (Journal ofFermentation and Bioengineering, 1991 71 volumes, 118-121 page or leaf) that iraq subtilis actinomycin A and homologue output thereof reach 620 mg/litre that obtains.
On the other hand, inventor of the present invention discloses the production method (JP-A-2002-176993) of subtilin surfactin as the method that is used for cultivating at the liquid nutrient medium that comprises soyflour or its extract bacillus micro-organism.Yet this patent is unexposed about iraq subtilis actinomycin A and homologue thereof.In addition, JP-A-59-212416 discloses and has cultivated in the substratum that comprises 1% soyflour to obtain 300 milligrams of iraq subtilis actinomycin As and homologue thereof from 16 liters of nutrient solutions.Yet the amount of the iraq subtilis actinomycin A that this method obtains is many unlike the amount that obtains by known cultural method.
Cultivation has the bacillus micro-organism that produces iraq subtilis actinomycin A and homologue ability thereof in the liquid nutrient medium that comprises 2% (mass percent) or more much bean powderes or its extract makes iraq subtilis actinomycin A and homologue thereof can be accumulate to 1.5 grams per liters or more in this substratum, and this point was unknown in the past.
Of the present invention open
Conventional obtain iraq subtilis actinomycin A and homologue thereof underproduce needs can improve the production method of output to be used for industrial application.
Therefore, thus one of target of the present invention provides by the bacillus micro-organism that cultivate to produce iraq subtilis actinomycin A and homologue thereof and produces iraq subtilis actinomycin A and homologue thereof and make the method for this microorganism at nutrient solution middle and high concentration accumulation iraq subtilis actinomycin A and homologue thereof.
Another target of the present invention provides the cultured products that comprises iraq subtilis actinomycin A and homologue thereof, its solid phase prod and their method of use.
For reaching above-mentioned target, inventor of the present invention has carried out a large amount of research to the various components in the substratum.The result, they find to cultivate the bacillus micro-organism that produces iraq subtilis actinomycin A and homologue thereof in as the substratum of nitrogenous source and cause the high density accumulation in nutrient solution of iraq subtilis actinomycin A and homologue thereof comprising 2% (mass percent) or more much bean powderes or its extract, thereby finish the present invention.
Promptly the present invention relates to the following method that is used to produce iraq subtilis actinomycin A and homologue thereof, relate to the culture that comprises iraq subtilis actinomycin A and homologue thereof, and relate to the solid matter that comprises iraq subtilis actinomycin A and analogue thereof.
1. be used to produce the method for iraq subtilis actinomycin A and homologue thereof, it is included in the liquid nutrient medium that comprises 2% (mass percent) or more much bean powderes or its extract to cultivate has the bacillus micro-organism that produces iraq subtilis actinomycin A and homologue thereof and makes this microorganism accumulate the iraq subtilis actinomycin A and the homologue thereof of 1.5 grams per liters or bigger concentration in this substratum.
2. produce the method for iraq subtilis actinomycin A and homologue thereof according to above-mentioned 1 being used to, wherein, having the bacillus micro-organism that produces iraq subtilis actinomycin A and homologue ability thereof is the bacillus micro-organism that can grow in the substratum that comprises 1.5 grams per liters or more iraq subtilis actinomycin As and homologue thereof.
3. produce the method for iraq subtilis actinomycin A and homologue thereof according to above-mentioned 1 or 2 being used to, wherein, having the bacillus micro-organism that produces iraq subtilis actinomycin A and homologue ability thereof is the bacillus micro-organism that can not produce subtilin surfactin basically.
4. produce the method for iraq subtilis actinomycin A and homologue thereof according to above-mentioned 1 being used to, wherein, will be with regard to K 2HPO 4And opinion is the phosphoric acid salt of 0 to 3% (mass percent), adds in the liquid nutrient medium.
5. according to above-mentioned 1 to 3 each the method that is used to produce iraq subtilis actinomycin A and homologue thereof, wherein, microorganism is subtilis (Bacillus subtilis).
6. according to above-mentioned 1 to 3 each the method that is used to produce iraq subtilis actinomycin A and homologue thereof, wherein, microorganism is subtilis SD142 (FERM BP-08427).
7. according to above-mentioned 1 to 3 each the method that is used to produce iraq subtilis actinomycin A and homologue thereof, wherein, microorganism is the mutant strain of subtilis SD142 (FERM BP-08427).
8. produce the method for iraq subtilis actinomycin A and homologue thereof according to above-mentioned 1 being used to, wherein, the liquid nutrient medium that comprises 2% (mass percent) or more much bean powderes or its extract comprises at least and is selected from a kind of in maltose, starch slurry, Zulkovsky starch, dextrin, glucose, sucrose and the fructose.
9. comprise by the iraq subtilis actinomycin A that obtains according to above-mentioned 1 to 8 each method and the culture of homologue thereof, wherein, iraq subtilis actinomycin A and homologue thereof accumulate in the substratum.
10. the solid matter that comprises iraq subtilis actinomycin A and homologue thereof, it obtains by above-mentioned 9 culture of drying.
11. be used to prevent the reagent of Plant diseases, it comprises above-mentioned 9 or 10 culture that contains iraq subtilis actinomycin A and homologue thereof or its solid matter.
12. be used to prevent the method for Plant diseases, it comprises above-mentioned 9 or 10 the culture that comprises iraq subtilis actinomycin A and homologue thereof or its solid matter of purified form not.
Detailed Description Of The Invention
To describe the present invention in detail hereinafter.
In the present invention, iraq subtilis actinomycin A and homologue thereof mean the derivative by following formula (1) representative, comprise relevant compound.
Figure A0382270700081
(the R representative has the straight or branched alkyl of 3 to 10 carbon atoms).
According to the present invention, the microorganism that produces iraq subtilis actinomycin A and homologue thereof cultivated in as the substratum of nitrogenous source and make iraq subtilis actinomycin A and analogue thereof adding 2% (mass percent) or more soyflour or its extract in this substratum middle and high concentration accumulation.Known to the present inventor, to cultivate the technology of bacillus micro-organism in as the substratum of nitrogenous source be conventional known comprising soyflour or its extract.Yet the inventor finds cultivate to produce the microorganism of iraq subtilis actinomycin A and homologue thereof with the new technology at this substratum middle and high concentration accumulation iraq subtilis actinomycin A and homologue thereof in as the substratum of nitrogenous source comprising 2% (mass percent) or more much bean powderes or its extract at first.
It is not particularly limited being used for bacillus micro-organism of the present invention, as long as can produce iraq subtilis actinomycin A and homologue thereof.Because iraq subtilis actinomycin A and homologue thereof are in the accumulation of substratum middle and high concentration, microorganism needs and can grow in the presence of the iturin of high density.
Therefore, bacillus micro-organism preferably has ability that produces iraq subtilis actinomycin A and homologue thereof and the bacillus micro-organism that can grow in the substratum that contains 1.5 grams per liter iraq subtilis actinomycin As and homologue thereof.In addition, as another preferred example, bacillus micro-organism preferably has the ability that produces iraq subtilis actinomycin A and homologue thereof but the bacillus micro-organism that do not have the ability that produces subtilin surfactin basically.The ability of subtilin surfactin " do not have basically produce " here mean when comprising soyflour or its extract as the substratum of nitrogenous source in during culturing micro-organisms, the semi-invariant of subtilin surfactin is 50ppm or still less.Preferred example with the bacillus micro-organism that produces her withered grass bacterium A and homologue ability thereof and can grow in the substratum that contains 1.5 grams per liters or more iturins and homologue thereof comprises subtilis SD142 (FERM BP-08427).
Isolated subtilis SD142 (FERM BP-08427) has following bacteriology characteristic from compost.
Bacteriology characteristic
(a) profile of morphology (1) bacterium: shaft-like,
(2) size of bacterium: 0.7 to 0.9 * 1.5 to 3.0 microns,
(3) polymorphism: do not have
(4) mobility: have
(5) spore: exist,
Spore shape: oval or cylindric
(6) gramstaining: the positive
(7) acid resistance: feminine gender
(b) growing state on the nutrient agar plate culture medium:
Diameter is 1 to 2 millimeter a circular colony, has the waveform periphery, viscid, tarnish;
(c) physiology characteristic
(1) nitrate reduction: the positive
(2) VP test: the positive
(3) generation of indoles: feminine gender
(4) utilization of citric acid: the positive
(5) utilization of succsinic acid: feminine gender
(6) utilization of propionic acid: feminine gender
(7) tartaric utilization: feminine gender
(8) urase: feminine gender
(9) oxydase: the positive
(10) catalase: the positive
(11) growth scope: pH5 to 9,
20 to 50 ℃ of temperature
(12) 10%NaCl substratum: growth
(13) anaerobic culture: feminine gender
(14) egg yolk reaction: feminine gender
(15) starch hydrolysis: the positive
(16) arginine decomposes: the positive
(17) tyrosine decomposes: feminine gender
(18) gelatine liquefication: the positive
(19) Vitamin C2 decomposes: the positive
(20) OF test: oxidation
(21) utilize glucose to produce acid: feminine gender
Subtilis SD142 (FERM BP-08427) is deposited in Independent Administrative Leged Industrial Technology Complex Inst, AIST builds the 6th eastern 1-fourth order 1-1 of ripple city central authorities, build ripple city Ibaraki-ken, Japan (postcode: 305-8566) (preserving number FERM P-19032), and transferred to international preservation (No.FERM BP-08427) from former preservation on July 10th, 2003.
In addition, in the present invention, also can preferably use mutant strain by the spontaneous mutation acquisition of subtilis SD142.As the acquisition of the mutant strain of spontaneous mutation can by the bacterial strain selecting those on plate culture medium, to have to have changed colonial morphology or by chemistry or physics sudden change incitant and subtilis SD142 reaction are produced a collection of have the bacterial strain of different iraq subtilis actinomycin As and homologue output thereof and therefrom separate have the bacterium colony that output increases.
For example can use EMS (ethyl methane sulfonate), ethyl sulfate or NTG (N-methyl-N '-nitro-N-nitrosoguanidine) as the chemical mutagenesis factor.As physics sudden change incitant, ultraviolet ray, gamma-rays, X ray etc. can bring out the needed amount of sudden change to be used.
One of the example that is used to produce the method for a collection of mutant strain is a kind of like this method, wherein, and will be such as NB (nutrient broth; By Difco Laboratories, Inc. produce) etc. grow to the subtilis cell harvesting of logarithmic phase in the nutritional medium and after washing, it be suspended in the physiological saline, the NTG of the sudden change amount of bringing out is added in the cell to bring out sudden change, and then collecting cell, eccysis NTG and such as NB (nutrient broth; By Difco Laboratories, Inc. produces) cultivate to produce a collection of mutant strain in such nutritional medium.
The example that is used to separate the method for the bacterium colony with output increase comprises a kind of like this method, wherein, coating suitably some mutant of dilution on plate culture medium, cultivating the bacillus subtilis mycetocyte, this plate culture medium be by to added sheep blood such as TBAB (Tryptones blood agar culture-medium; By Difco Laboratories, Inc. produces) add agar in the substratum and make, be separated in periphery of bacterial colonies has bigger clear zone than other bacterium colony bacterium colony can produce high density iraq subtilis actinomycin A and homologue thereof with selection mutant strain.
Subsequently, the output of the iraq subtilis actinomycin A of separated bacillus subtilis mutant strain and homologue thereof can confirm in contrast by cultivate subtilis SD142 in test tube.
Hereinafter the method that is used to produce iraq subtilis actinomycin A and homologue thereof according to the present invention will be described.The method that is used to produce iraq subtilis actinomycin A and homologue thereof according to the present invention for example can followingly be implemented the most expediently.Subtilis SD142 in such as the nutritional medium of L substratum at 25 to 42 ℃, cultivated about 5 to about 24 hours for preferred 28 to 38 ℃, with the nutrient solution that obtained with 0.1 to 10% (mass percent), preferred 0.5 to 7% (mass percent), more preferably the amount of 1 to 5% (mass percent) is inoculated in and comprises in soyflour or the substratum of its extract as nitrogenous source.At 25 to 42 ℃, cultivated about 30 to about 150 hours under preferred 28 to the 35 ℃ temperature.Temperature is under the situation outside the said temperature scope, and the generation of iraq subtilis actinomycin A and homologue thereof is non-desirably significantly to be reduced.
In the present invention, " soyflour or its extract " mean the granular soyflour that obtains by grinding soybean or skimmed soy beans, by soybean being ground to form milling soya seeds powder that fine powder obtains, their extract (for example hot water extract), hydrolysate (for example acid hydrolysis products, enzymic hydrolysate) or the like.The concentration of soyflour or its extract is contemplated to be 2% (mass percent) or bigger.Yet on the other hand, because the soyflour of excessive concentrations or its extract may cause inadequate sterilization, the concentration of expectation soyflour or its extract should be no more than 20% (mass percent).Therefore, be used to obtain the soyflour of high yield or the concentration of its extract is 2 to 20% (mass percents), preferred 3 to 17% (mass percents), more preferably 4 to 14% (mass percents).
Be used for substratum of the present invention except soyflour or its extract, can comprise metabolizable carbon source, nitrogenous source and the inorganic salt etc. of use usually.In addition, if desired, can add amino acid and/or VITAMIN etc.
The example of metabolizable carbon source comprises glucose, maltose, sucrose, fructose, soluble starch, starch slurry, dextrin, molasses, potato extract, Fructus Hordei Germinatus, peat, beet, vegetables oil, corn steep liquor, fructose, syrup, sugar, liquid sugar, Nulomoline, alcohols, organic acid, organic acid salt, alkane or other conventional carbon source.These carbon sources can be by separately or unite use.Wherein, preferred maltose, soluble starch, starch slurry and dextrin.These carbon sources can be generally about 0.01 to about 50% (mass percent), the preferred about 1 concentration use to about 40% (mass percent).
In addition, can use those comprise inorganic or organonitrogen such as the ammonium salt of ammonium nitrate, ammonium sulfate, ammonium chloride, ammonium acetate, volatile salt and bicarbonate of ammonia, ammonia, SODIUMNITRATE, saltpetre, Sodium Glutamate, urea, peptone, meat extract, corn steep liquor, casein hydrolysate, poultry powder (feather meal) but and yeast extract as the metabolism nitrogenous source.These nitrogenous sources can be by separately or unite use.They can be advantageously with common about 0.01 to 30% (mass percent), and the concentration of preferred 0.1 to 10% (mass percent) is used.
In addition, can add positively charged ion or anion ratio such as potassium ion, sodium ion, magnesium ion, phosphate radical, iron ion, mn ion, calcium ion, zine ion, cobalt ion, nickel ion, cupric ion, molybdenum ion, sulfate radical, chlorion or nitrate radical as inorganic component.The amount of the inorganic component that adds can change according to culture condition.Usually, magnesium salts is added into about 10ppm to the concentration of about 2% (mass percent), and that the salt outside the phosphoric acid salt is added into about 0.1ppm is extremely about 1, the concentration of 000ppm.Can add phosphate anion as phosphoric acid salt.If the phosphoric acid salt that adds is with regard to K 2HPO 4And opinion concentration is higher than 3% (mass percent), and then cumulative iraq subtilis actinomycin A and homologue amount thereof reduce.Therefore, expectation phosphoric acid salt is added into 3% (mass percent) or lower concentration.More preferably, the substratum that does not add phosphate radical is preferable.
The amino acid whose example that is added comprises L-glycine, L-L-Ala, L-Xie Ansuan, L-leucine, L-Isoleucine, L-Serine, L-Threonine, L-phenylalanine, L-tyrosine, L-halfcystine, Gelucystine, L-methionine(Met), L-tryptophane, L-Histidine, L-proline(Pro), L-aspartic acid, altheine, L-L-glutamic acid, L-glutaminate, L-arginine, L-Methionin, D-Xie Ansuan, D-Isoleucine etc.Can add wherein one or more.Amino acid is added into about 0.001 to about 5% (mass percent), preferred about 0.01 concentration to about 1% (mass percent).
Can add vitamin H, vitamins B 1, vitamins B 2, vitamins B 6, in nicotinic acid, niacinamide, pantothenic acid, pyridoxal, inositol, choline, folic acid, cobalami, cyanocobalamin etc. one or more are as VITAMIN.VITAMIN is added into 0.1 to 100ppm, preferred 1 to 50ppm concentration.
In cultivation according to the present invention, above-mentioned substratum is loaded on such as cultivating in the container of test tube, flask or fermentor tank and under the brute force ventilation.
Using under the situation of cultivating, ventilate by acutely shaking, and the initial pH of substratum is adjusted to 6.5 to 8.0 such as the container of test tube or flask.Using container to carry out under the situation of high density generation, cultivate under germ-free air flow, stirring and carry out such as fermentor tank.Cultivate under the situation that is difficult to carry out take place bubbling to cause, can add normally used common antifoams.
The pH of substratum is maintained 6.0 to 9.0, preferred 6.5 to 8.0, more preferably 6.8 to 7.3.By adding such as ammonia soln, potassium hydroxide aqueous solution, alkaline aqueous solutions such as aqueous sodium carbonate or wet chemical carry out the adjusting of pH.Wherein, preferably use ammonia soln.The concentration of ammonia soln advantageously about 8 is to about 25% (mass percent).By under optimum condition, carrying out such cultivation, can in 30 to 150 hours, obtain to comprise the iraq subtilis actinomycin A of 1.5 grams per liters or bigger concentration and the culture of homologue thereof.
By using the dry above-mentioned culture of currently known methods such as lyophilize or spray-drying process, can obtain to comprise the solid matter of iraq subtilis actinomycin A and homologue thereof.Comprise the culture of iraq subtilis actinomycin A and homologue thereof or comprise iraq subtilis actinomycin A and the solid matter of homologue is useful, it shows the usefulness that prevents Plant diseases when being applied to the leaf of agricultural land soil or crop.The solid matter that the present invention also relates to comprise the culture of iraq subtilis actinomycin A and homologue thereof and comprise iraq subtilis actinomycin A and homologue thereof.
In addition, can from the culture that comprises iraq subtilis actinomycin A and homologue thereof, reclaim iraq subtilis actinomycin A and homologue and purifying.Available currently known methods carries out purifying, for example make the culture acidifying with precipitation iraq subtilis actinomycin A and homologue thereof by adding sulfuric acid, hydrochloric acid, nitric acid etc., then throw out is carried out extraction treatment with organic solvent such as methyl alcohol, ethanol or chloroform, use activated carbon treatment, the method for crystallization processing and/or similar processing.
The iraq subtilis actinomycin A and the homologue thereof that obtain according to the present invention not only can be used as the reagent that prevents Plant diseases but also can be used as sanitising agent, emulsifying agent, moistening agent, dispersion agent, solubilizing agent, static inhibitor, antifogging agent, lubricant etc.Iraq subtilis actinomycin A that obtains according to the present invention and homologue thereof are useful as the moiety of makeup, food, pharmaceuticals, agrochemicals etc.
Implement best mode of the present invention
To the present invention be described in more detail by embodiment hereinafter.Yet, invention is not to be considered as being limited to these embodiment.
Be used to obtain the preparation embodiment 1 of the mutant strain of subtilis SD142
Be inoculated in subtilis SD142 in 5 milliliters of L substratum (5 gram sodium-chlor add water to 1 liter for 10 gram peptones, 5 gram yeast extracts) and hatched 16 hours with 300 rev/mins at 35 ℃.Then, the culture of acquisition is inoculated in 5 milliliters of same substratum with 1% (v/v), and hatches up to OD660 with 300 rev/mins at 35 ℃ and to reach 0.2.Pass through centrifugal recovery cell thereafter.Abandoning supernatant.With 5 milliliters of PBS damping fluids (0.8% (w/v) NaCl, 0.02% (w/v) KCl, 0.144% (w/v) Na 2HPO 4With 0.024% (w/v) KH 2PO 4, pH being transferred to 7.4 with HCl) and the cell of washing and recycling is suspended in it in 0.5 milliliter of same damping fluid for three times then.
With 0.05 milliliter 2, N-methyl-N ' of 000ppm-nitro-N-nitrosoguanidine aqueous solution adds suspension and this mixture was left standstill 10 minutes at 30 ℃.Centrifugal suspension, abandoning supernatant is suspended in 1 milliliter of fresh L substratum with 5 milliliters of same damping fluid washed cells three times and then with it.Suspension is added in 4 milliliters of L substratum, grow a night at 35 ℃.Then, 2.5 milliliter of 50% (mass percent) aqueous glycerin solution added suspension, with pack in bottle low temperature storage and freeze to preserve transformant of its five equilibrium in-135 ℃.
Then, to be 50 with concentration with the aseptic water-reducible transformant of preserving, 000/ flat board places on the Agar Plating, each Agar Plating comprises 5% (w/v) sheep blood, 4% (w/v) glucose and 0.1% (w/v) NB (by Difco Laboratories, Inc. produce) and 0.1% (w/v) yeast extract (Applied Environmental Microbiology, 42 phases: 408-412 page or leaf (1981)) so that obtain about 200 bacterium colony/flat boards.35 ℃ hatch 20 to 48 hours after, observe at the clear zone that the growth periphery of bacterial colonies forms and 50,000 bacterium colonies selecting to form big clear zone.
50,000 bacterium colonies of subtilis SD142 and acquisition are rule on the L plate culture medium, and grow a night at 35 ℃.The 1 ml aliquots substratum branch that will have the following component A test tube of packing into is respectively inoculated the L plate culture medium of a loopful and was hatched 72 hours at 35 ℃ in each test tube.
＜component A＞(quality %)
Soyflour 8
K 2HPO 4 0.5
MgSO 4·7H 2O 0.05
FeSO 4·7H 2O 0.0025
MnSO 4·5H 2O 0.0022
CaCl 2 0.0184
Maltose 6.7
The ion-exchange water balance
Culture is centrifugal, and under following condition, detect iraq subtilis actinomycin A and the homologue thereof that is contained in the supernatant liquor by the HPLC method.
Sample size: 10 microlitres
Post: Shodex Silica C18P4E,, produced by Showa Denko K.K. by 4.6 millimeters * 250 millimeters
Column temperature: 40 ℃
Elutriant: acetonitrile: 10mM ammonium acetate aqueous solution=35: 75 (volume/volume)
Flow velocity: 1.5 ml/min
Detector: UV-detector
Wavelength: 205 nanometers
Measure by standard samples (producing) the drawing standard curve that uses iraq subtilis actinomycin A and homologue thereof by Sigma-AldrichCo..
Acquisition is with the mutant strain (mutant strain 1) of high yield generation iraq subtilis actinomycin A and homologue thereof, and its original strain with subtilis SD142 is compared and shown iraq subtilis actinomycin A and the homologue cumulative concentration thereof that increases.
Be used to obtain the preparation embodiment 2 of the mutant strain of subtilis SD142
The concentration of subtilin surfactin is measured by the HPLC method under following condition in the supernatant liquor of the culture in preparation embodiment 1.
Sample size: 20 microlitres
Volume: Shodex Silica C18P4E,, produced by Showa DenkoK.K. by 4.6 millimeters * 250 millimeters
Column temperature: 40 ℃
Elutriant: acetonitrile: 19mM trifluoroacetic acid solution=80: 20 (volume/volume)
Flow velocity: 1.0 ml/min
Detector: UV-detector
Wavelength: 205 nanometers
Measure by standard samples (producing) the drawing standard curve that uses subtilin surfactin by Sigma-Aldrich Co..
Obtain not produce subtilin surfactin basically, have 50ppm or the mutant strain of the accumulation subtilin surfactin of small concentration (mutant strain 2) more.
Embodiment 1: nitrogenous source is to producing the influence of iraq subtilis actinomycin A and homologue thereof in test tube is cultivated
Subtilis SD142 bacterium is rule on the L plate culture medium, and grow a night at 35 ℃.With the substratum branch with following B component of the 1 ml aliquots test tube of packing into, inoculate a collarium L plate culture medium and hatched 72 hours at 35 ℃ to each test tube.
＜B component＞(quality %)
K 2HPO 4 0.5
MgSO 4·7H 2O 0.05
FeSO 4·7H 2O 0.0025
MnSO 4·5H 2O 0.0022
CaCl 2 0.0184
Maltose 6.7
Nitrogenous source *2.0
The ion-exchange water balance
*Nitrogenous source is selected from soyflour, saltpetre, ammonium nitrate, ammonium sulfate, urea, Sodium Glutamate and peptone.
Culture is centrifugal, and measure the iraq subtilis actinomycin A be contained in the supernatant liquor and the concentration of homologue thereof with the HPLC method.
Cumulative iraq subtilis actinomycin A and homologue concentration thereof are as follows under every kind of nitrogenous source situation of use.
The nitrogenous source iraq subtilis actinomycin A that uses and the concentration of homologue thereof
Soyflour 1.5 grams per liters
Saltpetre 0.03 grams per liter
Ammonium nitrate 0.03 grams per liter
Ammonium sulfate 0.03 grams per liter
Urea 0.03 grams per liter
Sodium Glutamate 0.1 grams per liter
Peptone 0.15 grams per liter
Embodiment 2: soyflour concentration is to producing the influence of iraq subtilis actinomycin A and homologue thereof in test tube is cultivated
Subtilis SD142 bacterial strain is rule on the L plate culture medium, and grow a night at 35 ℃.With the substratum branch that has following component C, D, E respectively of the 1 ml aliquots test tube of packing into, inoculate a collarium L plate culture medium and hatched 72 hours at 35 ℃ to each test tube.
＜component C＞(quality %)
Soyflour 1
K 2HPO 4 0.5
MgSO 4·7H 2O 0.05
FeSO 4·7H 2O 0.0025
MnSO 4·5H 2O 0.0022
CaCl 2 0.0184
Maltose 6.7
The ion-exchange water balance
＜component D＞(quality %)
Soyflour 2
K 2HPO 4 0.5
MgSO 4·7H 2O 0.05
FeSO 4·7H 2O 0.0025
MnSO 4·5H 2O 0.0022
CaCl 2 0.0184
Maltose 6.7
The ion-exchange water balance
＜component E＞(quality %)
Soyflour 8
K 2HPO 4 0.5
MgSO 4·7H 2O 0.05
FeSO 4·7H 2O 0.0025
MnSO 4·5H 2O 0.0022
CaCl 2 0.0184
Maltose 6.7
The ion-exchange water balance
Culture is centrifugal, and measure the iraq subtilis actinomycin A be contained in the supernatant liquor and the concentration of homologue thereof with the HPLC method.
The concentration of cumulative iraq subtilis actinomycin A and homologue thereof is as follows under every kind of substratum situation of use.
The substratum iraq subtilis actinomycin A that uses and the concentration of homologue thereof
Component C:0.3 grams per liter
Component D:1.5 grams per liter
Component E:3.8 grams per liter
Embodiment 3: carbon source is rule subtilis SD142 bacterial strain to the influence that produces iraq subtilis actinomycin A and homologue thereof on the L plate culture medium in test tube is cultivated, and grows a night at 35 ℃.Being added into of 1 ml aliquots substratum branch following carbon source, that have following component F is packed in the test tube, inoculate a collarium L plate culture medium and hatched 72 hours at 35 ℃ to each test tube.
＜component F＞(quality %)
Soyflour 8
K 2HPO 4 0.5
MgSO 4·7H 2O 0.05
FeSO 4·7H 2O 0.0025
MnSO 4·5H 2O 0.0022
CaCl 2 0.0184
Carbon source *6.7
The ion-exchange water balance
*Carbon source is selected from maltose, soluble starch, starch slurry, dextrin, glucose, sucrose and fructose.
Culture is centrifugal, and measure the iraq subtilis actinomycin A be contained in the supernatant liquor and the cumulative concentration of homologue thereof with the HPLC method.The iraq subtilis actinomycin A under every kind of carbon source situation of use and the cumulative concentration of homologue thereof are as follows.
Maltose 3.8 grams per liters
Soluble starch 3.8 grams per liters
Starch slurry 3.8 grams per liters
Dextrin 3.8 grams per liters
Glucose 2.8 grams per liters
Sucrose 2.2 grams per liters
Fructose 2.3 grams per liters
Embodiment 4: phosphoric acid salt is to producing the influence of iraq subtilis actinomycin A and homologue thereof in test tube is cultivated
Subtilis SD142 bacterial strain is rule on the L plate culture medium, and grow a night at 35 ℃.1 ml aliquots is added into (1) K to (6) concentration 2HPO 4, substratum branch with following component G packs in the test tube, inoculate a collarium L plate culture medium and hatched 72 hours to each test tube at 35 ℃.
＜component G＞(quality %)
Soyflour 8
MgSO 4·7H 2O 0.05
FeSO 4·7H 2O 0.0025
MnSO 4·5H 2O 0.0022
CaCl 2 0.0184
Maltose 6.7
K 2HPO 4Concentration
(1) 0 quality % (not adding)
(2) 0.1 quality %
(3) 0.5 quality %
(4) 1.5 quality %
(5) 3.0 quality %
(6) 4.5 quality %
The ion-exchange water balance
After pH being transferred to 7 with yellow soda ash, culture is centrifugal, and measure the iraq subtilis actinomycin A be contained in the supernatant liquor and the cumulative concentration of homologue thereof with the HPLC method.Has the K of each concentration 2HPO 4The cumulative concentration that is added into iraq subtilis actinomycin A under each situation of substratum and homologue thereof is as follows.
K 2HPO 4The concentration iraq subtilis actinomycin A and the concentration of homologue
(1) 0 quality % 3.8 grams per liters
(2) 0.1 quality % 3.6 grams per liters
(3) 0.5 quality % 3.5 grams per liters
(4) 1.5 quality % 3.0 grams per liters
(5) 3.0 quality % 2.2 grams per liters
(6) 4.5 quality % 1.5 grams per liters
Embodiment 5: produce iraq subtilis actinomycin A and homologue thereof in fermentor tank
Subtilis SD142, mutant strain 1 and mutant strain 2 rule on the L plate culture medium and 35 ℃ of one nights of growth.Inoculation every kind of substratum of one collarium and hatched 8 hours with 150 rev/mins in the band flask with indentation that has added 50 milliliters of L substratum at 35 ℃.Preparation has the substratum of following component H and to the every kind of culture that wherein adds the L plate culture medium in 5 liters of fermentor tanks.When pH being adjusted to 6.5 to 7.5, hatched 150 hours at 35 ℃ with 20% ammoniacal liquor.
＜component H＞
Soyflour 160 grams
MgSO 47H 2O 5 grams
FeSO 47H 2O 0.25 gram
MnSO 45H 2O 0.22 gram
CaCl 21.84 gram
Starch slurry 450 grams
Ion exchanged water 1,383 gram
Culture is centrifugal, and measure iraq subtilis actinomycin A and the homologue thereof be contained in the supernatant liquor with the HPLC method.The amount of iraq subtilis actinomycin A and homologue thereof is as follows.
Subtilis SD142 3.8 grams per liters
Mutant strain 1 6.7 grams per liters
Mutant strain 2 6.7 grams per liters
Find out obviously that from these results in these bacterial strains each can both grow in the presence of 1.5 grams per liters or more iraq subtilis actinomycin As.
Industrial usability
According to the present invention, at multiple industrial circle such as pharmaceuticals, agricultural chemicals, food, change Making up in product and the chemicals all useful iraq subtilis actinomycin A and homologue thereof, can to pass through use cheap Culture medium raw material is produced, and compares with conventional method to have the concentration that increases substantially.
In addition, according to the present invention of energy high concentration generation iraq subtilis actinomycin A and homologue thereof, agricultural Chemicals and plant disease prevent in the field that this culture former state can be employed, and conventional cultivation Thing itself can not be used with culture itself owing to insufficient concentration.

Claims (12)

1. be used to produce the method for iraq subtilis actinomycin A and homologue thereof, its be included in comprise 2% or the liquid nutrient medium of the soyflour of bigger mass percent or its extract in cultivate bacillus micro-organism with the ability that produces iraq subtilis actinomycin A and homologue thereof so that this microorganism accumulates the iraq subtilis actinomycin A and the homologue thereof of 1.5 grams per liters or bigger concentration in substratum.
2. the method that is used to produce iraq subtilis actinomycin A and homologue thereof as claimed in claim 1, wherein, the bacillus micro-organism with the ability that produces iraq subtilis actinomycin A and homologue thereof is the bacillus micro-organism that can grow in the substratum that contains 1.5 grams per liters or more iraq subtilis actinomycin As and homologue thereof.
3. the method that is used to produce iraq subtilis actinomycin A and homologue thereof as claimed in claim 1 or 2, wherein, the bacillus micro-organism with the ability that produces iraq subtilis actinomycin A and homologue thereof is the bacillus micro-organism that can not produce subtilin surfactin basically.
4. the method that is used to produce iraq subtilis actinomycin A and homologue thereof as claimed in claim 1, wherein, will be with regard to K 2HPO 4And opinion is in the phosphoric acid salt adding liquid nutrient medium of 0 to 3% mass percent.
5. as each described method that is used to produce iraq subtilis actinomycin A and homologue thereof in the claim 1 to 3, wherein, microorganism is subtilis (Bacillus subtilis).
6. as each described method that is used to produce iraq subtilis actinomycin A and homologue thereof in the claim 1 to 3, wherein, microorganism is subtilis SD142 (FERM BP-08427).
7. as each described method that is used to produce iraq subtilis actinomycin A and homologue thereof in the claim 1 to 3, wherein, microorganism is the mutant strain of subtilis SD142 (FERM BP-08427).
8. the method that is used to produce iraq subtilis actinomycin A and homologue thereof as claimed in claim 1, wherein, comprise 2% or the liquid nutrient medium of the soyflour of bigger mass percent or its extract comprise and be selected from least a in maltose, starch slurry, soluble starch, dextrin, glucose, sucrose and the fructose.
9. comprise the culture that contains iraq subtilis actinomycin A and homologue thereof that obtains by as each described method in the claim 1 to 8, wherein, iraq subtilis actinomycin A and homologue thereof are accumulated in substratum.
10. the solid matter that comprises iraq subtilis actinomycin A and homologue thereof, it obtains by dry culture as claimed in claim 9.
11. be used to prevent the reagent of Plant diseases, described reagent comprises as claim 9 or the 10 described culture of iraq subtilis actinomycin A and homologue thereof or the solid matters of this culture of containing.
12. be used to prevent the method for Plant diseases, it comprises with purified form not and using as claim 9 or the 10 described culture of iraq subtilis actinomycin A and homologue thereof or the solid matters of this culture of containing.
CNB03822707XA 2002-09-24 2003-09-22 Production method for iturin A and its homologues Expired - Fee Related CN100357448C (en)

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CN102286080A (en) * 2010-06-18 2011-12-21 中国科学院成都生物研究所 Preparation method of iturin A
CN101724014B (en) * 2009-07-13 2012-09-12 江苏省农业科学院 Antibacterial lipopeptide of endophytic Bacillus subtilis and separation and purification method
CN103773712A (en) * 2013-12-06 2014-05-07 天津大学 Antifungal peptide high-yield strain and method for preparing antibacterial peptide
CN104694601A (en) * 2013-12-30 2015-06-10 中国科学院成都生物研究所 High-efficiency preparation method of Iturin A and homologue of Iturin A
CN111961701A (en) * 2020-01-21 2020-11-20 吉林农业大学 Fermentation liquor for producing extracellular bacteriostatic protein by bacillus amyloliquefaciens SZ-60 and fermentation method thereof
CN113563425A (en) * 2021-07-23 2021-10-29 广州百仕肽生物科技有限公司 Iturin9 and preparation method and application thereof

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CN101724014B (en) * 2009-07-13 2012-09-12 江苏省农业科学院 Antibacterial lipopeptide of endophytic Bacillus subtilis and separation and purification method
CN102286080A (en) * 2010-06-18 2011-12-21 中国科学院成都生物研究所 Preparation method of iturin A
CN103773712A (en) * 2013-12-06 2014-05-07 天津大学 Antifungal peptide high-yield strain and method for preparing antibacterial peptide
CN104694601A (en) * 2013-12-30 2015-06-10 中国科学院成都生物研究所 High-efficiency preparation method of Iturin A and homologue of Iturin A
CN111961701A (en) * 2020-01-21 2020-11-20 吉林农业大学 Fermentation liquor for producing extracellular bacteriostatic protein by bacillus amyloliquefaciens SZ-60 and fermentation method thereof
CN113563425A (en) * 2021-07-23 2021-10-29 广州百仕肽生物科技有限公司 Iturin9 and preparation method and application thereof

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