CN106282055B - One plant of Lactococcus lactis - Google Patents
One plant of Lactococcus lactis Download PDFInfo
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- CN106282055B CN106282055B CN201610653951.8A CN201610653951A CN106282055B CN 106282055 B CN106282055 B CN 106282055B CN 201610653951 A CN201610653951 A CN 201610653951A CN 106282055 B CN106282055 B CN 106282055B
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- lactococcus lactis
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- 241000194035 Lactococcus lactis Species 0.000 title claims abstract description 35
- 235000014897 Streptococcus lactis Nutrition 0.000 title claims abstract description 35
- 238000004321 preservation Methods 0.000 claims description 5
- 235000021107 fermented food Nutrition 0.000 claims 3
- 235000021110 pickles Nutrition 0.000 claims 1
- 235000013618 yogurt Nutrition 0.000 claims 1
- 238000000855 fermentation Methods 0.000 abstract description 5
- 230000004151 fermentation Effects 0.000 abstract description 5
- 235000013305 food Nutrition 0.000 abstract description 4
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000001963 growth medium Substances 0.000 description 11
- 230000001580 bacterial effect Effects 0.000 description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 6
- 238000009395 breeding Methods 0.000 description 5
- 230000001488 breeding effect Effects 0.000 description 5
- 239000002054 inoculum Substances 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000006518 acidic stress Effects 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 231100000350 mutagenesis Toxicity 0.000 description 4
- 238000002703 mutagenesis Methods 0.000 description 4
- 239000002504 physiological saline solution Substances 0.000 description 4
- 230000004083 survival effect Effects 0.000 description 4
- 230000003698 anagen phase Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000012010 growth Effects 0.000 description 3
- 230000003834 intracellular effect Effects 0.000 description 3
- 235000014655 lactic acid Nutrition 0.000 description 3
- 239000004310 lactic acid Substances 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000219 mutagenic Toxicity 0.000 description 2
- 230000003505 mutagenic effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- CATWCRUATKKAAQ-UHFFFAOYSA-N 2,3-dihydroxypropyl dihydrogen phosphate;sodium Chemical compound [Na].[Na].OCC(O)COP(O)(O)=O CATWCRUATKKAAQ-UHFFFAOYSA-N 0.000 description 1
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 241001052560 Thallis Species 0.000 description 1
- 229930003268 Vitamin C Natural products 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 229940041514 candida albicans extract Drugs 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229940099352 cholate Drugs 0.000 description 1
- BHQCQFFYRZLCQQ-OELDTZBJSA-N cholic acid Chemical compound C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)[C@@H](O)C1 BHQCQFFYRZLCQQ-OELDTZBJSA-N 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- AIUDWMLXCFRVDR-UHFFFAOYSA-N dimethyl 2-(3-ethyl-3-methylpentyl)propanedioate Chemical compound CCC(C)(CC)CCC(C(=O)OC)C(=O)OC AIUDWMLXCFRVDR-UHFFFAOYSA-N 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 239000006041 probiotic Substances 0.000 description 1
- 235000018291 probiotics Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000012137 tryptone Substances 0.000 description 1
- 235000019154 vitamin C Nutrition 0.000 description 1
- 239000011718 vitamin C Substances 0.000 description 1
- 239000012138 yeast extract Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
- C12N1/205—Bacterial isolates
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C9/00—Milk preparations; Milk powder or milk powder preparations
- A23C9/12—Fermented milk preparations; Treatment using microorganisms or enzymes
- A23C9/123—Fermented milk preparations; Treatment using microorganisms or enzymes using only microorganisms of the genus lactobacteriaceae; Yoghurt
- A23C9/1236—Fermented milk preparations; Treatment using microorganisms or enzymes using only microorganisms of the genus lactobacteriaceae; Yoghurt using Leuconostoc, Pediococcus or Streptococcus sp. other than Streptococcus Thermophilus; Artificial sour buttermilk in general
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2400/00—Lactic or propionic acid bacteria
- A23V2400/21—Streptococcus, lactococcus
- A23V2400/231—Lactis
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/46—Streptococcus ; Enterococcus; Lactococcus
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Microbiology (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Genetics & Genomics (AREA)
- Polymers & Plastics (AREA)
- Biomedical Technology (AREA)
- Virology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Medicinal Chemistry (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Food Science & Technology (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
The invention discloses one plant of Lactococcus lactis, belong to technical field of food biotechnology.The isolated Strain Designation of the present invention is Lactococcus lactis WH103 (Lactococcus lactis WH103), has preferable sour tolerance, has huge application value in fields such as food, fermentations.Although the present invention has been described by way of example and in terms of the preferred embodiments; but it is not intended to limit the invention, any person skilled in the art, without departing from the spirit and scope of the present invention; various change and modification can be all done, therefore protection scope of the present invention should subject to the definition of the claims.
Description
Technical field
The present invention relates to one plant of Lactococcus lactis, belong to technical field of food biotechnology.
Background technique
As industrialized Microbial cell factories, Lactococcus lactis is widely used to food, the fields such as fermentation.It is opening
It opens up in the fermentation method production process of required industrial products in above-mentioned field, characteristic of lactic acid production becomes the essential composition portion of microorganism
Point.On the one hand metabolism produces acid and can help to promote cellular energy conversion, maintain intraor extracellular osmotic balance, enhance this body cell
Environment is competitive.On the other hand, with the accumulation intracellular for producing acid, the pH for causing microbial cells intracellular is continued to decline, intracellular
It maintains the relevant enzymes activity of cell normal physiological function to be suppressed, and then influences the metabolic activity and its production effect of cell
Rate, and many hidden danger are buried for production cost, Downstream processing and subsequent industrial emissions environmental improvement.Meanwhile as probiotics
One of, the environment-stress such as acid stress, cholate stress are also subject in human gastrointestinal tract.Therefore, microbial strains are improved
Acid stress tolerance, become academia and industrial circle major issue urgently to be resolved.
Summary of the invention
Technical problem to be solved by the invention is to provide one plant of Lactococcus lactis (Lactococcus lactis)
WH103 was preserved in China typical culture collection center (CCTCC) on April 29th, 2016, and deposit number is CCTCC NO:M
2016235, preservation address is Wuhan, China Wuhan University.
It is to set out that the Lactococcus lactis WH103, which is with Lactococcus lactis (Lactococcus lactis NZ9000),
Bacterial strain is obtained by ultraviolet mutagenesis, under conditions of 4.5 pH, OD600Value reaches 0.431, improves 3.3 before the mutagenesis that compares
Times；Coerce 2h, survival rate 5.64% in the lactic acid of pH4.0, survival rate be under same treatment conditions before mutagenesis bacterial strain 5.7
Times.
The Lactococcus lactis WH103 (CCTCC NO:M 2016235) that breeding of the present invention obtains dashes forward under the conditions of lower pH
Becoming bacterial strain WH103 can preferably grow, and starting strain cannot be grown under the conditions of lower pH, and mutant strain WH103 has
Better growth performance and sour tolerance.Selection provided by the invention, operation is simple, and effect is more apparent.
Biomaterial preservation
One plant of Lactococcus lactis (Lactococcus lactis) WH103, is preserved in Chinese Typical Representative on April 29th, 2016
Culture collection (CCTCC), deposit number are CCTCC NO:M 2016235, and preservation address is that Wuhan, China Wuhan is big
It learns.
Specific embodiment
GM17 culture medium are as follows: glucose 5.0g.L-1, tryptone 5.0g.L-1, soy peptone 5.0g.L-1, beef leaching
Cream 5.0g.L-1, yeast extract 2.5g.L-1, vitamin C 0.5g.L-1, magnesium sulfate 0.25g.L-1, phosphoglycerol disodium
19.0g.L-1。
The GM17 culture medium that the pH value that the lactic acid that the GM17 culture medium of pH 5.0 is 25% is adjusted is 5.0.Other pH's
GM17 culture medium in kind obtains.
The selection of 1 Lactococcus lactis of embodiment (CCTCC NO:M 2016235)
With Lactococcus lactis (Lactococcus lactis NZ9000) for starting strain, by it in GM17 culture medium
Culture adjusts bacterial concentration 1*10 to logarithmic growth phase7A/CFU, sampling centrifugation (5000rpm；Supernatant is removed after 10min), is used
0.85% brine is resuspended, and is repeated twice.Identical physiological saline is added to be resuspended in equal volume, then in ultraviolet mutagenesis
The stationary culture 1.5h at 30 DEG C is added after isometric GM17 culture medium is resuspended in centrifugation after carrying out mutagenic treatment 40s in case.
In 96 deep-well plates of 2.2ml be added 1ml GM17 (pH 5.0) culture medium, take it is above-mentioned after cultivate culture solution with
2% inoculum concentration is transferred in 96 deep-well plates, stationary culture 48h at 30 DEG C, investigates life of the mutagenic strain in acid medium
Long situation filters out mutation hybrid bacterial strain according to the size of biomass, then by hybrid bacterial strain through appropriate dilution spread pH 5.0
Plate, picking individual colonies, by single bacterium fall within pH be 5.0 under the conditions of ferment, mutant strain is filtered out according to biomass size, out
Bacterium germination strain OD600Reach 0.076, the OD of mutant strain WH103600Reach 0.504, is preserved in Chinese allusion quotation on April 29th, 2016
Type culture collection, deposit number are CCTCC NO:M 2016235.
Growth performance under the conditions of 2 Lactococcus lactis of embodiment (CCTCC NO:M 2016235) acid stress
By the starting strain Lactococcus lactis being preserved in -80 DEG C of glycerol tubes (Lactococcus lactis NZ9000)
And the Lactococcus lactis (Lactococcus lactis WH103) that breeding is arrived accesses GM17 culture medium with 2% inoculum concentration,
30 DEG C of stationary culture 12h.
Activated Lactococcus lactis NZ9000 and Lactococcus lactis WH103 is taken to be transferred to respectively with 2% inoculum concentration
In GM17 (pH 4.5) culture medium, the stationary culture 48h at 30 DEG C, the bacterium of measurement fermentation liquid is dense after fermentation.In pH 4.5
Under conditions of, mutant strain OD600Value reaches 0.527, and 4.5 times are improved before the breeding that compares.The results are shown in Table 1.
Thalli growth performance under the conditions of 1 acid stress of table
| Bacterial strain | LactococcuslactisNZ9000 | LactococcuslactisWH103 |
| OD600 | 0.081 | 0.431 |
The sour tolerance test of embodiment 3
By the starting strain Lactococcus lactis being preserved in -80 DEG C of glycerol tubes (Lactococcus lactis NZ9000)
And the Lactococcus lactis (Lactococcus lactis WH103) that breeding is arrived accesses GM17 culture medium with 2% inoculum concentration,
30 DEG C of stationary culture 12h.
Activated Lactococcus lactis NZ9000 and Lactococcus lactis WH103 to GM17 is taken to train respectively with 2% inoculum concentration
It supports in base, 30 DEG C of stationary cultures to logarithmic growth phase.
The cell of logarithmic growth phase, through 5000rpm centrifugation 10min collect thallus, thallus through 0.85% physiological saline
After washing centrifugation 2 times, it is resuspended in GM17 (pH 4.0) culture medium in equal volume and coerces different time samplings, again with identical
Physiological saline centrifuge washing cell 2 times, and be resuspended in isometric physiological saline, take the bacterium solution of 100 μ l after suitably diluting
Spread plate for 24 hours in 30 DEG C of stationary cultures calculates separately survival rate size (as shown in table 2).Cream of the mutant strain in pH 4.0
Coerce 1h, 2h, 3h in acid respectively, survival rate is 1.1 times of bacterial strain before the lower breeding of same treatment conditions respectively, 5.7 times, 1.9
Times.
The sour tolerance test of table 2
Claims (4)
1. one plant of Lactococcus lactis (Lactococcus lactis) WH103, which is characterized in that in preservation on April 29 in 2016
In China typical culture collection center, deposit number is CCTCC NO:M 2016235, and preservation address is Wuhan, China Wuhan
University.
2. Lactococcus lactis (Lactococcus lactis) WH103 described in claim 1 is preparing answering in fermented food
With.
3. application according to claim 2, which is characterized in that the fermented food is pickles.
4. application according to claim 2, which is characterized in that the fermented food is Yoghourt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610653951.8A CN106282055B (en) | 2016-08-10 | 2016-08-10 | One plant of Lactococcus lactis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610653951.8A CN106282055B (en) | 2016-08-10 | 2016-08-10 | One plant of Lactococcus lactis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106282055A CN106282055A (en) | 2017-01-04 |
| CN106282055B true CN106282055B (en) | 2019-06-21 |
Family
ID=57668305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610653951.8A Active CN106282055B (en) | 2016-08-10 | 2016-08-10 | One plant of Lactococcus lactis |
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| Country | Link |
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| CN (1) | CN106282055B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093962A (en) * | 2009-08-28 | 2011-06-15 | 吉林大学 | Lactococcus lactis induced strain and breeding method thereof |
| CN104212858A (en) * | 2013-11-06 | 2014-12-17 | 西藏天虹科技股份有限责任公司 | Adsorption separation coupling fermentation process with high nisin yield, |
| CN104593311A (en) * | 2015-01-16 | 2015-05-06 | 江南大学 | Recombinant lactobacillus with improved acid stress resistance as well as construction method and application of recombinant lactobacillus |
| CN104894030A (en) * | 2015-06-18 | 2015-09-09 | 郑州大学 | Lactococcus lactis subsp.lactis and application of lactococcus lactis subsp.lactis in low-temperature silage |
| CN105624076A (en) * | 2016-04-08 | 2016-06-01 | 山东康地得生物开发有限公司 | Acid-resistant denitrifying Bacillus subtilis strain, and composite microbial inoculant and preparation method thereof |
-
2016
- 2016-08-10 CN CN201610653951.8A patent/CN106282055B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093962A (en) * | 2009-08-28 | 2011-06-15 | 吉林大学 | Lactococcus lactis induced strain and breeding method thereof |
| CN104212858A (en) * | 2013-11-06 | 2014-12-17 | 西藏天虹科技股份有限责任公司 | Adsorption separation coupling fermentation process with high nisin yield, |
| CN104593311A (en) * | 2015-01-16 | 2015-05-06 | 江南大学 | Recombinant lactobacillus with improved acid stress resistance as well as construction method and application of recombinant lactobacillus |
| CN104894030A (en) * | 2015-06-18 | 2015-09-09 | 郑州大学 | Lactococcus lactis subsp.lactis and application of lactococcus lactis subsp.lactis in low-temperature silage |
| CN105624076A (en) * | 2016-04-08 | 2016-06-01 | 山东康地得生物开发有限公司 | Acid-resistant denitrifying Bacillus subtilis strain, and composite microbial inoculant and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN106282055A (en) | 2017-01-04 |
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