CN103436505A - Preparation method of tannase - Google Patents
Preparation method of tannase Download PDFInfo
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- CN103436505A CN103436505A CN2013103502255A CN201310350225A CN103436505A CN 103436505 A CN103436505 A CN 103436505A CN 2013103502255 A CN2013103502255 A CN 2013103502255A CN 201310350225 A CN201310350225 A CN 201310350225A CN 103436505 A CN103436505 A CN 103436505A
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- tannase
- citric acid
- sodium citrate
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Abstract
The invention discloses a preparation method of tannase. The method comprises the following steps: enlarging cultivation is performed on aspergillus ficuum slant strains through a shake flask; the mixture of corn flour and soybean meal or the mixture of bagasse and bran are taken as fermentation medium substrates; a salt solution is added to prepare into fermentation media; aspergillus ficuum suspension is added into the fermentation media; the fermentation media are fermented for 65 h at the constant temperature of 35 DEG C, and a citric acid-sodium citrate buffer solution with the pH value of 5.5 is added; concussion extraction is performed for 90 minutes, and crude enzyme is collected after the fermentation media are filtered by filter paper, tannase freeze-dried powder is prepared after the crude enzyme is purified and freeze-dried.
Description
Technical field
The present invention relates to a kind of method for preparing tannase, belong to the biological fermentation field.
Background technology
Tannase (Tannase EC3.1.1.20), claim again Tannase, is a kind of inducible enzyme, can when the inductors such as Weibull exist, induce synthetic by certain micro-organisms.Tannase can be hydrolyzed ester bond and the contracting phenol carboxylic key in the Nutgalls tannin, generates gallic acid and other compounds.Tannase is widely used in the fields such as beverage, wine brewing, medicine, process hides, makeup, particularly preparing medicinal intermediate gallic acid and Food Antioxidant Propyl Gallate and, processing the aspects such as tealeaves " cream down " and beer precipitation, thering is important using value.
Summary of the invention
The object of the present invention is to provide a kind of method for preparing tannase.
Purpose of the present invention is achieved through the following technical solutions:
A kind of method for preparing tannase comprises the following steps:
(1) seed enlarged culturing: by Fructus Fici aspergillus slant strains access shaking flask enlarged culturing;
(2) configuration fermention medium: make the fermentation culture substrate with Semen Maydis powder, dregs of beans mixture or bagasse, bran mixture, add salts solution, sterilizing, cooling;
(3) tannase fermentation: after substratum is cooling, access 1mL Fructus Fici aspergillus suspension, ferment at constant temperature;
(4) crude enzyme liquid preparation: the fermention medium after finishing toward ferment at constant temperature adds the citric acid-sodium citrate damping fluid of pH5.5, is placed in the shaking table concussion and extracts 90min, filters, and collects crude enzyme liquid;
(5) tannase purifying.
Semen Maydis powder described in step (2), dregs of beans mixture are evenly mixed with the mass ratio of 2 ︰ 1 by Semen Maydis powder, dregs of beans, bagasse, bran mixture are evenly to be mixed with 1 ︰ 1 mass ratio by bagasse, wheat bran, the substratum substrate becomes 6 ︰ 7 mass volume ratio ratios with the salts solution added, every liter of salts solution contains 10gNH
4cl, 1gKCl, 2gK
2hPO
4, 1gMgSO
47H
2o.
Fructus Fici aspergillus suspension described in step (3) is Fructus Fici aspergillus Gim3.6 (being purchased from Guangdong Province DSMZ) suspension, and concentration is 1 * 10
8individual spore/mL, the tannase fermentation condition is 35 ℃ of ferment at constant temperature 65h.
Fermention medium described in step (4) becomes 1 ︰ 10 mass volume ratios with pH5.5 citric acid-sodium citrate damping fluid, shaking table shakes speed for 160r/min.
Tannase purifying described in step (5) comprises three kinds of methods, the tannase purifying comprises three kinds of methods, method one is ammonium sulfate graded precipitation, toward adding saturation ratio in crude enzyme liquid, be 30%~70% ammonium sulfate, collecting precipitation, add the citric acid-sodium citrate damping fluid dissolution precipitation of 5 ℃ that becomes 1 ︰ 1 volume ratio with pH5.5 citric acid-sodium citrate damping fluid in step (4), take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder, method two is acetone precipitation, add-20 ℃ of acetone in crude enzyme liquid, 4 ℃ of standing 3h, 6000r/min centrifugation 20min, collecting precipitation, add the citric acid-sodium citrate damping fluid dissolution precipitation of 5 ℃ that becomes 1 ︰ 1 volume ratio with pH5.5 citric acid-sodium citrate damping fluid in step (4), take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder, method three is reverse micelle extraction methods, using the crude enzyme liquid collected as water, add organic phase 75mmol/LCTAB-isooctane Reversed Micelles solution with 1 ︰ 1 volume ratio, on the 200r/min shaking table, concussion mixes 13min, 4000r/min centrifugation 5min, get organic phase, add strip aqueous 0.5mol/L NaCl solution by the 1:1 volume ratio, on the 200r/min shaking table, concussion mixes 30min, 4000r/min centrifugation 5min, obtain water, concentrated with the polyethylene glycol 6000 embedding, take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder.
With Fructus Fici aspergillus fermentative production tannase, fermentation period is short, and zymotechnique is simple, and culturing process is easy to control.The reverse micelle extraction technology is carried out purifying to crude enzyme liquid, economic and practical, easily carries out suitability for industrialized production.
The accompanying drawing explanation
Fig. 1 is tannase preparation technology flow process of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is done to further detailed elaboration, but embodiments of the present invention are not limited to the scope that embodiment means.These embodiment are only for the present invention is described, but not for limiting the scope of the invention.In addition, after reading content of the present invention, those skilled in the art can do various modifications to the present invention, and these equivalent variations fall within appended claims limited range of the present invention equally.
Embodiment 1
Fructus Fici aspergillus Gim3.6 (being purchased from Guangdong Province DSMZ) slant strains is through the shaking flask enlarged culturing.Semen Maydis powder, dregs of beans evenly mix as the fermentation culture substrate by the mass ratio of 2 ︰ 1, and (every liter of salts solution contains 10gNH to add salts solution by 6 ︰ 7 mass volume ratios
4cl, 1gKCl, 2gK
2hPO
4, 1gMgSO
47H
2o.), sterilizing, cooling.Access concentration is 1 * 10
8the Fructus Fici aspergillus suspension 1mL of individual spore/mL, 35 ℃ of ferment at constant temperature 65h.Ferment at constant temperature adds the citric acid-sodium citrate damping fluid of pH5.5 in fermention medium by 1 ︰ 10 mass volume ratios after finishing, and is placed in and shakes concussion extraction 90min on the shaking table that speed is 160r/min, filters, and collects crude enzyme liquid.Toward adding saturation ratio in crude enzyme liquid, be 30% ammonium sulfate, collecting precipitation, add the citric acid-sodium citrate damping fluid dissolution precipitation of 5 ℃ that becomes 1 ︰ 1 volume ratio with pH5.5 citric acid-sodium citrate damping fluid, take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder.
Embodiment 2
Fructus Fici aspergillus Gim3.6 (being purchased from Guangdong Province DSMZ) slant strains is through the shaking flask enlarged culturing.Semen Maydis powder, dregs of beans evenly mix as the fermentation culture substrate by the mass ratio of 2 ︰ 1, and (every liter of salts solution contains 10gNH to add salts solution by 6 ︰ 7 mass volume ratios
4cl, 1gKCl, 2gK
2hPO
4, 1gMgSO
47H
2o.), sterilizing, cooling.Access concentration is 1 * 10
8the Fructus Fici aspergillus suspension 1mL of individual spore/mL, 35 ℃ of ferment at constant temperature 65h.Ferment at constant temperature adds the citric acid-sodium citrate damping fluid of pH5.5 in fermention medium by 1 ︰ 10 mass volume ratios after finishing, and is placed in and shakes concussion extraction 90min on the shaking table that speed is 160r/min, filters, and collects crude enzyme liquid.Toward adding saturation ratio in crude enzyme liquid, be 50% ammonium sulfate, collecting precipitation, add the citric acid-sodium citrate damping fluid dissolution precipitation of 5 ℃ that becomes 1 ︰ 1 volume ratio with pH5.5 citric acid-sodium citrate damping fluid, take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder.
Embodiment 3
Fructus Fici aspergillus Gim3.6 (being purchased from Guangdong Province DSMZ) slant strains is through the shaking flask enlarged culturing.Bagasse, wheat bran evenly mix as the fermentation culture substrate by 1 ︰ 1 mass ratio, and (every liter of salts solution contains 10gNH to add salts solution by 6 ︰ 7 mass volume ratios
4cl, 1gKCl, 2gK
2hPO
4, 1gMgSO
47H
2o.), sterilizing, cooling.Access concentration is 1 * 10
8the Fructus Fici aspergillus suspension 1mL of individual spore/mL, 35 ℃ of ferment at constant temperature 65h.Ferment at constant temperature adds the citric acid-sodium citrate damping fluid of pH5.5 in fermention medium by 1 ︰ 10 mass volume ratios after finishing, and is placed in and shakes concussion extraction 90min on the shaking table that speed is 160r/min, filters, and collects crude enzyme liquid.Toward adding saturation ratio in crude enzyme liquid, be 70% ammonium sulfate, collecting precipitation, add the citric acid-sodium citrate damping fluid dissolution precipitation of 5 ℃ that becomes 1 ︰ 1 volume ratio with pH5.5 citric acid-sodium citrate damping fluid, take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder.
Embodiment 4
Fructus Fici aspergillus Gim3.6 (being purchased from Guangdong Province DSMZ) slant strains is through the shaking flask enlarged culturing.Bagasse, wheat bran evenly mix as the fermentation culture substrate by 1 ︰ 1 mass ratio, and (every liter of salts solution contains 10gNH to add salts solution by 6 ︰ 7 mass volume ratios
4cl, 1gKCl, 2gK
2hPO
4, 1gMgSO
47H
2o.), sterilizing, cooling.Access concentration is 1 * 10
8the Fructus Fici aspergillus suspension 1mL of individual spore/mL, 35 ℃ of ferment at constant temperature 65h.After ferment at constant temperature finishes, by 1 ︰ 10 mass volume ratios, the citric acid-sodium citrate damping fluid of pH5.5 is added in fermention medium, be placed in and shake concussion extraction 90min on the shaking table that speed is 160r/min, with double-deck qualitative filter paper, filter, collect crude enzyme liquid, add-20 ℃ of acetone, 4 ℃ of standing 3h, 6000r/min centrifugation 20min, collecting precipitation, add the citric acid-sodium citrate damping fluid dissolution precipitation of 5 ℃ that becomes 1 ︰ 1 volume ratio with pH5.5 citric acid-sodium citrate damping fluid, take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder.
Embodiment 5
Fructus Fici aspergillus Gim3.6 (being purchased from Guangdong Province DSMZ) slant strains is through the shaking flask enlarged culturing.Semen Maydis powder, dregs of beans evenly mix as the fermentation culture substrate by the mass ratio of 2 ︰ 1, and (every liter of salts solution contains 10gNH to add salts solution by 6 ︰ 7 mass volume ratios
4cl, 1gKCl, 2gK
2hPO
4, 1gMgSO
47H
2o.), sterilizing, cooling.Access concentration is 1 * 10
8the Fructus Fici aspergillus suspension 1mL of individual spore/mL, 35 ℃ of ferment at constant temperature 65h.Ferment at constant temperature adds the citric acid-sodium citrate damping fluid of pH5.5 in fermention medium by 1 ︰ 10 mass volume ratios after finishing, and is placed in and shakes concussion extraction 90min on the shaking table that speed is 160r/min, filters, and collects crude enzyme liquid.Using the crude enzyme liquid collected as water, add the CTAB-isooctane Reversed Micelles solution of organic phase 75mmol/L under the condition that is 30 ℃ in temperature by the volume ratio of 1 ︰ 1, on the shaking table that is 200r/min at rotating speed, concussion mixes 13min, 4000r/min rotating speed centrifugation 5min, get organic phase, add the NaCl solution of strip aqueous 0.5mol/L by the volume ratio of 1 ︰ 1, on the shaking table that is 200r/min at rotating speed, concussion mixes 30min, with 4000r/min rotating speed centrifugation 5min, obtain water; With polyethylene glycol 6000, that the water embedding of obtaining is concentrated, take dextrane gel Sephacryl200-HR as chromatography column, loading, wash-out, obtain the tannase refined solution, and lyophilize makes the tannase lyophilized powder.
With Fructus Fici aspergillus fermentative production tannase, fermentation period is short, and zymotechnique is simple, and culturing process is easy to control.The reverse micelle extraction technology is carried out purifying to crude enzyme liquid, economical and practical, easily carries out suitability for industrialized production.
Claims (8)
1. a method for preparing tannase comprises the following steps:
(1) seed enlarged culturing: by Fructus Fici aspergillus slant strains access shaking flask enlarged culturing;
(2) configuration fermention medium: make the fermentation culture substrate with Semen Maydis powder, dregs of beans mixture or bagasse, bran mixture, add salts solution, sterilizing, cooling;
(3) tannase fermentation: after substratum is cooling, access 1mL Fructus Fici aspergillus suspension, ferment at constant temperature;
(4) crude enzyme liquid preparation: the fermention medium after finishing toward ferment at constant temperature adds the citric acid-sodium citrate damping fluid of pH5.5, is placed in the shaking table concussion and extracts 90min, filters, and collects crude enzyme liquid;
(5) tannase purifying.
2. according to the described method for preparing tannase of right 1, it is characterized in that: the Semen Maydis powder described in step (2), dregs of beans mixture are evenly mixed with the mass ratio of 2 ︰ 1 by Semen Maydis powder, dregs of beans, bagasse, bran mixture are evenly to be mixed with 1 ︰ 1 mass ratio by bagasse, wheat bran, the substratum substrate becomes 6 ︰ 7 mass volume ratio ratios with the salts solution added, every liter of salts solution contains 10gNH
4cl, 1gKCl, 2gK
2hPO
4, 1gMgSO
47H
2o.
3. according to the described method for preparing tannase of right 1, it is characterized in that: the Fructus Fici aspergillus suspension described in step (3) is Fructus Fici aspergillus Gim3.6 (being purchased from Guangdong Province DSMZ) suspension, and concentration is 1 * 10
8individual spore/mL, the tannase fermentation condition is 35 ℃ of ferment at constant temperature 65h.
4. according to a kind of described method for preparing tannase of right 1, it is characterized in that: the fermention medium described in step (4) becomes 1 ︰ 10 mass volume ratios with pH5.5 citric acid-sodium citrate damping fluid, and shaking table shakes speed for 160r/min.
5. according to the described method for preparing tannase of right 1, it is characterized in that: the tannase purifying comprises three kinds of methods.
6. according to the described tannase purifying of right 1 or 5, it is characterized in that: first method is ammonium sulfate graded precipitation, toward adding saturation ratio in crude enzyme liquid, be 30%~70% ammonium sulfate, collecting precipitation, add the citric acid-sodium citrate damping fluid dissolution precipitation of 5 ℃ that becomes 1 ︰ 1 volume ratio with pH5.5 citric acid-sodium citrate damping fluid in step (4), take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder.
7. according to the described tannase purifying of right 1 or 5, it is characterized in that: second acetone precipitation of tannase purifying, add-20 ℃ of acetone in crude enzyme liquid, 4 ℃ of standing 3h, 6000r/min centrifugation 20min, collecting precipitation, add the citric acid-sodium citrate damping fluid dissolution precipitation of 5 ℃ that becomes 1 ︰ 1 volume ratio with pH5.5 citric acid-sodium citrate damping fluid in step (4), take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder.
8. according to the described tannase purifying of right 1 or 5, it is characterized in that: the 3rd method of tannase purifying is the reverse micelle extraction method, using the crude enzyme liquid collected as water, add organic phase 75mmol/L CTAB-isooctane Reversed Micelles solution with 1 ︰ 1 volume ratio, on the 200r/min shaking table, concussion mixes 13min, 4000r/min centrifugation 5min, get organic phase, add strip aqueous 0.5mol/L NaCl solution by the 1:1 volume ratio, on the 200r/min shaking table, concussion mixes 30min, 4000r/min centrifugation 5min, obtain water, concentrated with the polyethylene glycol 6000 embedding, take dextrane gel Sephacryl200-HR as the chromatography column chromatography, obtain the tannase refined solution, lyophilize makes the tannase lyophilized powder.
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Cited By (4)
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CN104195121A (en) * | 2014-09-05 | 2014-12-10 | 广西大学 | Solid culture medium for cassava leaves as well as preparation method and application of solid culture medium |
CN104263706A (en) * | 2014-10-15 | 2015-01-07 | 广西大学 | Purification method for tannase |
CN104962544A (en) * | 2015-06-17 | 2015-10-07 | 集美大学 | Method for directly immobilizing tannase in fermentation liquor |
CN107904219A (en) * | 2017-12-29 | 2018-04-13 | 集美大学 | A kind of tannase solid-state fermentation culture medium preparation method and applications |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104195121A (en) * | 2014-09-05 | 2014-12-10 | 广西大学 | Solid culture medium for cassava leaves as well as preparation method and application of solid culture medium |
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CN104962544A (en) * | 2015-06-17 | 2015-10-07 | 集美大学 | Method for directly immobilizing tannase in fermentation liquor |
CN104962544B (en) * | 2015-06-17 | 2017-11-03 | 集美大学 | A kind of method of the immobilized tannase directly from zymotic fluid |
CN107904219A (en) * | 2017-12-29 | 2018-04-13 | 集美大学 | A kind of tannase solid-state fermentation culture medium preparation method and applications |
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