WO2006025295A1 - マンナンタンパク質を放出する酵母株およびマンナンタンパク質の製造法 - Google Patents
マンナンタンパク質を放出する酵母株およびマンナンタンパク質の製造法 Download PDFInfo
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- WO2006025295A1 WO2006025295A1 PCT/JP2005/015619 JP2005015619W WO2006025295A1 WO 2006025295 A1 WO2006025295 A1 WO 2006025295A1 JP 2005015619 W JP2005015619 W JP 2005015619W WO 2006025295 A1 WO2006025295 A1 WO 2006025295A1
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- 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
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/1048—Glycosyltransferases (2.4)
- C12N9/1051—Hexosyltransferases (2.4.1)
Definitions
- the present invention relates to a yeast strain that releases a yeast cell wall component, particularly a mannan protein, particularly a mannan protein containing ⁇ -mannan, into a medium, and a mannan protein using this strain, particularly a mannan containing ⁇ -mannan.
- the present invention relates to a method for producing a protein.
- the present invention also relates to a method for producing mannan, particularly ⁇ -mannan.
- yeast has a long history of safety and has been used not only for bread production and fermentation of alcohol such as beer, but also for yeast itself as an extract or as a yeast cell wall.
- the cell wall is mainly composed of insoluble glucan and has been mainly used as dietary fiber.
- Glucan is also known to have functions such as immunostimulation, and has become one of the food materials that attract attention in the recent health food boom.
- water-soluble polysaccharides mainly composed of mannan protein are also present in the cell wall.
- Mannan protein is a general term for substances in which mannan chains are bound to proteins located in the cell wall in a binding mode called ⁇ -glycoside bond or 0-glycoside bond.
- Mannan extraction methods reported in these can be broadly classified into three. (1) Extraction of hot water (including dilute alkali) (Japanese Examined Patent Publication No. 64-3479, Japanese Unexamined Patent Publication No. 58-109423) (2) Autolysis (Japanese Examined Publication No. 58-57153) (3) Digestion with cell wall lytic enzyme ( Shoko 59-40 126).
- the crude extracts obtained by these methods function by appropriately combining a mannan-copper complex to remove copper, deproteinize with hydrochloric acid, alcohol precipitation, ion exchange chromatography, gel filtration chromatography, protease treatment, etc.
- the sex fraction was collected. The purification steps in these methods are complicated, and the amount recovered per liter of medium was about 10 mg.
- Rhodotorula mucilaginosa strain YR-2 is known as a yeast that secretes mannan out of bacteria (Japanese Journal of Nutrition, Food Science Society, 55 ⁇ , 33-39 (2002), JP 2002-095492).
- the mannan secreted by this yeast is a so-called ⁇ -mannan composed of ⁇ 1,3- and ⁇ 1,4-bonds, and is different from ⁇ -mannan contained in the mannan protein which is a cell wall component.
- An object of the present invention is to provide a yeast strain that releases a mannan protein that is as close to the native state of yeast as possible, particularly a mannan protein containing human mannan, and such a mannan protein, particularly a mannan protein containing ⁇ -mannan. It is to provide an efficient manufacturing method.
- Another object of the present invention is to provide a mannan protein, particularly a mannan protein containing ⁇ -mannan, which is produced using the yeast strain and koji of the present invention or the method of the present invention and which is close to the natural state.
- ⁇ -mannan is a polymer of D-mannose composed of ⁇ 1, 6-, ⁇ -1, 2- or a 1, 3-linkage.
- Another object of the present invention is to provide a method for efficiently producing mannan, particularly ⁇ -mannan.
- a further object of the present invention is to provide a mannan close to the natural state, especially ⁇ -mannan, produced using the process of the present invention.
- mannan protein and mannan are yeast-derived mannan protein (yeast mannan protein) and yeast-derived mannan (yeast mannan), respectively.
- the present invention is a yeast strain characterized by releasing yeast cell wall components, particularly mannan proteins, particularly mannan proteins containing ⁇ -mannan, into a medium. More specifically, the present invention is a yeast that releases a mannan protein containing human mannan into a medium by having a mutation in a sugar chain synthesis system gene. More specifically, the present invention relates to a yeast strain that releases mannan protein into a culture medium, characterized in that the mutation is in a gene that codes for a protein involved in the mechanism that causes the mannan protein to remain in the cell wall. It is.
- the present invention is a yeast that releases a mannan protein including ⁇ -mannan having a mutation in a gene encoding a 1,2-mannosyltransferase. More specifically, the present invention relates to a yeast strain that releases a mannan protein containing ⁇ -mannan, which has a mutation in the gene encoding ⁇ 1,2-mannosyltransferase, and which comprises the above 1,2-mannosyltransferase.
- nucleic acid capable of hybridizing under stringent conditions with a nucleic acid having the sequence of nucleotide numbers 234 to 2081 of the sequence set forth in SEQ ID NO: 17 (this region encodes GPI10 protein (GpilOp)), Fermentation mother stock.
- the yeast of the present invention is a yeast identified by the accession number FERM BP-10390 or FERM BP-10391.
- the present invention also provides a method for culturing a yeast characterized by releasing cell wall components into a medium, in particular, an enzyme that releases mannan protein, particularly mannan protein containing ⁇ -mannan, into a medium in a liquid medium.
- a method for producing a mannan protein, particularly a mannan protein comprising a mannan protein which comprises recovering a mannan protein released into the medium, particularly a mannan protein comprising ⁇ -mannan.
- the present invention also provides a mannanta naturally produced in the cell wall produced by the above method. It is also an isolated mannan protein that is close to the protein and in a state (close to the natural state), particularly an isolated mannan protein containing ⁇ -mannan.
- the present invention relates to a mannan protein naturally occurring in the cell wall comprising removing a protein moiety obtained from the present invention and / or from a mannan protein of the present invention, in particular a mannan protein comprising ⁇ -mannan.
- a mannan protein comprising ⁇ -mannan.
- yeast that releases cell wall components, particularly mannan protein, into the medium is produced and used.
- Such a yeast can be obtained by mutagenesis treatment of yeast and selecting a yeast strain in which mannan protein can no longer remain on the cell wall.
- the yeast to be mutated is not particularly limited. Sesaccharomyces bayanus, Saccharomyces kudriavzevii, Tanorebeguchi Kluyveromyces lactis, Candida utilis, Candida citis ⁇ , Saccharomyces cerevisiae More preferable Mutagenesis treatment can be performed by general methods such as mutagen treatment such as EMS, UV irradiation, and irradiation. Are well known to those skilled in the art (Ishikawa et al., Microbial Genetics Experimental Methods). Kaiser. C. et al., 1994 Metho ds in east enetics, old bpnng Harbor Laboratory.
- a yeast strain that releases almost no mannan protein such as a wild-type yeast strain
- YPD medium a yeast strain that releases almost no mannan protein
- 4 ml of 2% dalcose Suspend in an appropriate buffer such as 0.2 M phosphate buffer (pH 8.0), and add ethylmethanesulfonate (EMS) at a final concentration of 1% to 5%, preferably about 3%.
- EMS ethylmethanesulfonate
- the concentration of EMS and the treatment time are appropriately adjusted so that the survival rate is 15% to 60%, preferably about 20 to 30%. Can be varied.
- neutralize EMS with 6% sodium thiosulfate solution and apply the cells to an appropriate medium such as YPD medium.
- the yeast of the present invention encodes a 1,2-mannosyltransferase involved in the biosynthesis of a synthesizing enzyme such as a glycosylphosphatidylinositol (GPI) anchor at a site necessary for the mannan protein to remain in the cell wall.
- a synthesizing enzyme such as a glycosylphosphatidylinositol (GPI) anchor
- GPI glycosylphosphatidylinositol
- the yeast of the present invention is a yeast that cannot retain the mannan protein in the cell wall while retaining a function essential for force survival having a mutation in GPI10. Therefore, the yeast of the present invention can also be obtained by a site-specific or random mutagenesis method targeting a gene encoding 1,2-mannosyltransferase, for example, GPI10. Such molecular biological techniques are also well known to those skilled in the art.
- the yeast of the present invention has a mutation in the GPI10 gene such that a proline residue at position 498 in the amino acid sequence described in SEQ ID NO: 18 is substituted with a leucine residue. It is.
- the yeast of the present invention comprises a nucleic acid having a sequence of nucleotide numbers 234 to 2081 of the sequence shown in SEQ ID NO: 17 (GpilOp is encoded by this region) and a string.
- the stringent condition means a condition in which a so-called specific hybrid is formed and a non-specific hybrid is not substantially formed.
- DNA having high homology with stringent conditions for example, DNAs having a homology of 70% or more, preferably 80% or more preferentially hybridize, and DNAs having a lower homology are preferentially hybridized.
- DNAs having a homology of 70% or more, preferably 80% or more preferentially hybridize are preferentially hybridized.
- no hybridization, or hybridization at a temperature and salt concentration corresponding to 50 ° C, 2xSSC, 0.1% SDS, preferably lxSSC, 0.1% SDS, more preferably 0.1xSSC, 0.1% SDS is there.
- a polypeptide having a sequence having 40% or more homology with the amino acid sequence shown in SEQ ID NO: 18 can be considered as a 1,2-mannosyltransferase candidate in the present invention.
- a gene encoding a polypeptide can be considered as a gene encoding ⁇ 1,2-mannosyltransferase.
- Nucleic acid or amino acid homology can be found in NCBI (http://www.ncbi.nlm.nih.gov/Genbank/GenbankOver view.html) or DDBJ (http://www.ddbj.nig.ac.jp/Welcome). -j.html) can be calculated by using BL ASTN, BLASTP, FASTA, etc.
- Saccharomyces paradoxus gb AABY01000142.1
- 86% for Saccharomyces mikatae gb: AABZ01000054.1 85% for Saccharomyces bayanus gb: AACG0100048 5.1
- lactose 68% for 49643748, 50% for Neurospora crassa ref-NW-04710.1, Schizosaccharomyces pombe ref-NC—003421.1 "41%, 49% for Candida albicans gb: AACQ 01000012.1
- homology to the amino acid sequence of SEQ ID NO: 18 of SMP3 and ALG9 is 40% and 43%, respectively.
- a protein encoded by an acid and a protein having 40% or more sequence homology with the sequence shown in SEQ ID NO: 18 are generally available (having X 1,2-mannosyltransferase activity.
- the nucleic acid is introduced into an ⁇ 1,2-mannosyltransferase-deficient yeast strain (e.g., Eu roscarf Y24509) along with the appropriate promoter and other sequences required for expression to complement the a1,2-mannosyltransferase of the defective strain. (Especially lethal complementation).
- proteins having a 1,2-mannosyltransferase activity are also collectively referred to as a 1,2-mannosyltransferase.
- the yeast of the present invention comprises a nucleic acid having a sequence of nucleotide numbers 234 to 2081 of the sequence shown in SEQ ID NO: 17 (GpilOp is encoded by this region) and a stringent.
- a proline residue corresponding to the 498th proline residue of the sequence shown in SEQ ID NO: 18 is substituted with a leucine residue.
- This yeast has a mutation.
- the proline residue corresponding to the 498th proline residue in the sequence described in SEQ ID NO: 18 can be determined by aligning amino acid sequences.
- the candidate strains are synthesized in an appropriate medium, for example, synthetic; 3 ⁇ 4 ⁇ (Difco dry soil Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17% Glucose (2%, amino acid 0.13%) is cultured at approximately 30 ° C for 2-4 days, and the supernatant is precipitated by adding approximately 2-3 times the amount of ethanol as needed (ethanol precipitation method). It can be analyzed by PAS staining etc. after -PAGE (SDS-polyacrylamide electrophoresis). The medium and culture temperature do not inhibit the growth of the yeast !, and preferably are suitable for the growth of the yeast! Next, a strain that has been confirmed to release more mannan protein into the medium than the parental wild-type strain can be selected and used as the yeast of the present invention.
- 3 ⁇ 4 ⁇ Difco dry soil Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17% Gluco
- yeast of the present invention can be added or removed by backcrossing the yeast of the present invention, or by mating with a mutant yeast strain or a wild-type yeast strain.
- mannan protein release, growth rate and auxotrophy have been improved, or other properties have been imparted or improved
- diploid, mannan protein-releasing yeast can be made.
- Yeast Multiplication methods and conditions are well known to those skilled in the art (Ausubel et al., Current Protocols in Molecular Biology, John Wiley & Sons, Inc. (1994)).
- the present inventors have produced various derivative strains that release mannan protein, particularly a-mannan protein, using MTY9 as a starting material (Fig. 4).
- Typical examples of yeasts that release mannan proteins of the present invention and that can be used in the present invention, particularly mannan proteins including hi-mannan, include the yeasts identified by the following accession numbers:
- the AB9 strain is particularly preferable because it releases a large amount of mannan protein, particularly mannan protein including ⁇ -mannan, has good growth, and has no auxotrophy. Both ⁇ 9 and ⁇ 9 can be used as starting materials for producing yeast that releases mannan proteins, particularly mannan proteins containing ⁇ -mannan.
- the obtained yeast is preferably used in a liquid medium, for example, a synthetic medium (Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17%, Glucose 2%, amino acid 0.13%) at about 30 ° C.
- the culture supernatant is grown under aerobic conditions for 24 hours or longer, more preferably 24 hours to 96 hours, more preferably 24 hours to 72 hours, and the yeast cells are removed by centrifugation and Z or filter filtration.
- Mannan protein can be recovered as a residue collected or filtered through an ultrafiltration membrane or an ethanol Z aqueous solution, for example, a 2: 1 precipitate (ethanol concentration 66.7% (v / v)).
- the ultrafiltration is preferably performed with a molecular weight of about 10,000, preferably about 50,000 as a threshold value.
- the culture medium and culture temperature should not inhibit the growth of the yeast, and are preferably suitable for the growth of the yeast.
- Mannan protein recovered by ultrafiltration may be subjected to a drying step after dilution with an appropriate amount of water.
- the ethanol precipitation collection is dissolved in water and then dried.
- lyophilization or the like may be performed.
- the dried mannan protein obtained by ethanol precipitation is a white, highly water-soluble powder that contains about 10% protein.
- Mannan protein of ⁇ 900 mg / l, preferably 200 mg / l to 880 mg / l can be obtained.
- At least 150 mg / l to 300 mg / l after 24 hours of culture at least 150 mg / l to 900 mg / l, preferably 200 mg / l after 72 hours of culture.
- From 1 to 880 mg / l of mannan protein can be obtained.
- the yeast of the present invention releases mannan protein into the medium as it grows, that is, as cell wall synthesis proceeds, so that the mannan in the culture supernatant is further examined by examining the culture conditions. It is also possible to increase the concentration and total amount of protein
- the mannan protein obtained by such a method is not subjected to any chemical and Z or physical treatment, and is close to mannan protein naturally present in the cell wall. It can be used in the food industry such as beverages.
- mannan protein released by the yeast of the present invention particularly the mannan protein strength protein containing a-mannan
- an isolated mannan close to the natural state can be obtained.
- it is possible to obtain more useful isolated mannan by removing the protein portion having various structures.
- any method known to those skilled in the art may be used to remove the protein portion having the mannan protein strength, but it is particularly preferable to use the method without significantly modifying the structure of the mannan portion.
- the removal of the protein portion from the mannan protein can be carried out, for example, by partial degradation with a glycosylation enzyme such as endoglycosidase, acid treatment, or alkali treatment.
- Mutagenesis Wild-type yeast strain YNN27 was cultured in YPD medium, collected, suspended in 0.2 M phosphate buffer (pH 8.0) containing 4 ml of 2% glucose, and ethyl sulfonate (3%). Suspended in EMS). It was shaken at 30 ° C for 70 minutes for mutation treatment. After the mutation treatment, EMS was neutralized with 6% sodium thiosulfate solution, and the cells were applied to YPD medium. The 129 yeast strains that had grown were used as candidate strains.
- sample A a culture solution-derived ethanol precipitation sample
- Butoethanol was boiled in a 100 ° C hot water bath for 3 minutes and then used for the test.
- Sample A mixed with sample buffer 10 ⁇ 1 was electrophoresed with TEFCO precast SDS-PAGE gel 4-12% gradient gel (Cat. No. 01 032) at 18 mA per gel for about 2 hours. .
- the acrylamide gel was removed from the assembly, and fixed by shaking in 50% methanol for 1 hour. The methanol water was discarded, the water was renewed and shaken for 20 minutes. After repeating this operation again, the solution was replaced with an acid solution and shaken for 1 hour. After washing again with water twice for 20 minutes each time, the solution was replaced with a coloring solution and shaken for 1 hour to develop color. The result was judged visually.
- Mannan in mannan protein was quantified by DIONEX ion chromatography as follows.
- the culture solution-derived ethanol precipitation sample (sample A) described in 2) was prepared.
- the culture supernatant (sample B) obtained by filtering the culture was also analyzed.
- the mixture was cooled to room temperature, transferred to a 15 ml disposable centrifuge tube, and dried with a centrifugal evaporator. After drying, dissolve in 5 ml of water and pass through a Waters Sep-pak plus C18 (WAT0 20515: equilibrated with 5 ml of methanol and 5 ml of water) and a 0.45 mm sample filter. did.
- Glucose and mannose monosaccharide standard solutions of 20, 40, and 60 ppm were used as standards for quantification V, and when they did not enter the calibration curve, analysis was performed by appropriately diluting.
- the instrument used was an ion chromatography instrument GP-50 manufactured by Dionetas, and the amperometry detector ED-40 was used as the detector.
- the mobile phase is MilliQ water for solution A, 200 mM sodium hydroxide solution for solution D, and A: D is set to 95: 5 for starting analysis up to 30 minutes, from 30 to 45 minutes 0: 100, 45 component force 70 The minutes were set at 95: 5.
- a quantitative value was obtained from a calibration curve using a standard solution, and the content in each sample was calculated.
- the concentration of mannose in the medium was 13.4 mg / l, which was about 4 times the concentration in the culture supernatant of the wild strain.
- YNN27 or AH22 was multiplied, and MT39-6A and MT41-10D were finally obtained.
- These strains were haploid and had strong auxotrophy and good mannan protein release. By multiplying them, a diploid strain AB9 without auxotrophy was produced.
- the AB9 strain is a particularly suitable strain for industrial use, which has good growth without auxotrophy and can stably release mannan protein.
- MTY9 and AB9 which is a homodiploid strain
- MTY9 and AB9 are patent biological deposit centers of the National Institute of Advanced Industrial Science and Technology (1-1-1, Tsukuba Rinto, 1-1-1, Chuo No. 6, Ibaraki Prefecture, Japan). Postal code 305-8566), the deposit numbers are as follows:
- AB9 was originally deposited at the Patent Organism Depositary, National Institute of Advanced Industrial Science and Technology on July 13, 2004, and was assigned the deposit number FERM P-20116. Transferred to international deposit and assigned accession number FERM BP-10390. MTY9 was originally deposited at the Patent Organism Depositary, National Institute of Advanced Industrial Science and Technology on July 13, 2004, and was assigned the deposit number FERM P-20117, and was deposited internationally on August 3, 2005. And was given the accession number FERM BP-10391.
- Plasmids containing yeast chromosome fragments that lost mannan-releasing properties in a plasmid-dependent manner were recovered using the Q-BIO gene RPM Yeast Plasmid Isolation Kit (2069-400), and the DNA sequence of the region containing the inserted fragment was determined. Were determined. The nucleotide sequence was analyzed using Prism3100Avant (Applied Biosystems) and Big Dye Terminator Kit ver.3.0 (4390242).
- ORF protein coding region
- GPI10 is involved in the biosynthesis of the GPI anchor, and in the MTY9 strain and its derivatives, the mannan protein cannot remain in the cell wall because the GPI anchor is not sufficiently biosynthesized, and is released into the medium. It was thought to be a spider.
- Mannan protein-releasing strain MT37-2B (strain produced by backcrossing MTY9) and wild type strain GPI10 gene was recovered and mutation sites were identified.
- Rl primer set including 1000 bases upstream and 300 bases downstream of GPI10 ORF
- F2 AATAGATTAATTTGCCCC (SEQ ID NO: 4)
- F6 CATTTACTTGGAGACCCA (SEQ ID NO: 8)
- R1 TTGTTCTGCTCTACGAACTTTTCA (SEQ ID NO: 10)
- R2 GGCTGTATGTTTTACCTG (SEQ ID NO: 11)
- R3 ACAGATTCAACAAGATAG (SEQ ID NO: 12)
- R4 TCAAAAGAGTTGATGAAC (SEQ ID NO: 13)
- R5 CAATGTGCCGGCTCCAAT (SEQ ID NO: 14)
- R6 AGATAAGCTCAAAGAAGA (SEQ ID NO: 15)
- R7 TACTTGCCGAAAGAAACC (SEQ ID NO: 16)
- ⁇ 27 of the parent strain is 100% -mutated with the nucleotide sequence of the GPI10 gene in the database (the sequence of nucleotide numbers 234 to 2081 of SEQ ID NO: 17 (this region encodes GpilOp)), and the mutated yeast strain Nucleotide sequences that differ only in the two were powerful.
- One site was a single base substitution in the ORF upstream 78 base, and the other site was a mutation in the ORF. Therefore, in order to confirm which of these mutations is involved in mannan protein release, the recovered gene was Subcloning and plasmid shuffling were performed. The gene was collected using TOYOBO's KOD + and reacted according to the attached protocol.
- GpilOp is considered to be a membrane protein that transmembranes multiple times in amino acid sequence.
- the mutation of MT Y9 strain was found to be a mutation that replaces proline in the C-terminal domain with leucine (Fig. 3).
- the amino acid sequence of wild type GpilOp is shown in SEQ ID NO: 18.
- the amino acid sequence described in SEQ ID NO: 18 is a sequence encoded by nucleotide numbers 234 to 2081 described in SEQ ID NO: 17.
- Mannan-releasing yeast strain MTY9 in 1 L synthetic medium (Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17%, Glucose 2%, amino acid 0.13%) in an Erlenmeyer flask at 30 ° C for 10 days Rotating culture and sampling over time were conducted, and the release of mannan protein was examined by the SDS S-PAGE method shown in Example 1. Around 40 hours after the start of culture, cell growth entered the stationary phase from the logarithmic growth phase, but it was revealed that the amount of mannan protein increased with cell growth. When quantified using the method described in Example 1, it was shown that about 150 mg of mannan protein was recovered per liter of culture supernatant in terms of mannose after completion of the culture.
- Mannan protein-releasing strain AB9 was cultivated in 2 L synthetic medium (Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17%, Glucose 2%, Amino acid 0.13%) in jar culture (30 ° C, pH 5.5, aeration 1 wm, agitation 200 rpm, 72 hours) and culture fluid power Mannan protein was quantified in the same manner as in Example 3. This indicated that about 230 mg of mannan protein was recovered per liter of culture supernatant in terms of mannose.
- 2 L synthetic medium Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17%, Glucose 2%, Amino acid 0.13%
- Mannan protein-releasing strain AB9 was jar-cultured in 2 L of synthetic medium (Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.51%, Glucose 6%, amino acid 0.4%) (30 C., pH 5.5, aeration rate 1 wm, agitation 200 rpm, 72 hours) and culture fluid force Mannan protein was quantified in the same manner as in Example 3. This indicated that about 880 mg of mannan protein was recovered per liter of culture supernatant in terms of mannose.
- synthetic medium Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.51%, Glucose 6%, amino acid 0.4%) (30 C., pH 5.5, aeration rate 1 wm, agitation 200 rpm, 72 hours
- culture fluid force Mannan protein was quantified in the same manner as in Example 3. This indicated that about 880 mg of mannan protein was recovered per
- the recovered mannan protein was treated with Endoglycosidase H (EndoH), electrophoresed, and then subjected to PAS staining.
- EndoH Endoglycosidase H
- An ethanol precipitation sample was prepared from the culture medium of MTY9 by the method described in Example 1.
- the ethanol-precipitated sample was enzymatically treated using EndoH (P0702S) from New England Biolabs according to the recommended protocol. That is, 4 L of 10 ⁇ denaturing buffer (5% SDS, 10% j8-ME) was added to 36 L of solution A, and boiled at 100 ° C. for 10 minutes.
- the sample was mixed with 5 ⁇ l of 10 ⁇ G5 buffer (0.5 M sodium citrate pH 5.5) and stirred, and then divided into 25 ⁇ L and 20 L. 25 L was kept at 37 ° C for 1 hour as a negative target.
- Mannan-releasing yeast strain MT36-4D (MATa ura3, see Fig. 4) was cultured in 6L of synthetic medium (Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17%, ulucose 2%, nonacid 0.13%)
- synthetic medium Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17%, ulucose 2%, nonacid 0.13%
- a sample was prepared by drying the aqueous mannan protein solution recovered by ethanol precipitation with a freeze dryer (1.05 g).
- Mannan-releasing strain MT36-4D in 6 L synthetic medium (Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17%, Glucose 2%, amino acid 0.13%) in an Erlenmeyer flask as described in Example 3
- the culture supernatant obtained by culturing and culturing the yeast cells by filtration was used as a sample.
- Mannan-releasing strain MT36-4D (Fig. 4) was prepared in a triangular flask using 6 L of synthetic medium (Difco Yeast Nitrogen Base w / o Amino acid and Ammonium sulfate 0.17%, Glucose 2%, amino acid 0.13%). After culturing as described above, the culture strength was removed by filtration. 10% of the culture supernatant was filtered with 100% ethanol (Wako Pure Chemical Industries, Ltd.) at a final concentration of 33%, 50%, 60%, 6 6.7%, 80%, respectively. (Volume concentration) was adjusted to -30 ° C.
- the present invention provides yeast that releases mannan protein, particularly mannan protein containing ⁇ -mannan, into a culture medium, a method for producing the same, and an isolated mannan protein that is close to the natural state produced by the method. . That is, according to the present invention, 1) yeast that releases mannan protein, particularly mannan protein containing ⁇ -mannan, into the medium, and 2) conventionally, mannan protein has been recovered by physical or chemical treatment, whereas There is provided an efficient method for producing mannan protein, which comprises recovering mannan protein from a medium in which the yeast is cultured.
- a mannan protein particularly a mannan protein containing ⁇ -mannan can also be provided continuously according to the present invention.
- the yeast of the present invention that releases mannan protein into the medium can also be used to breed useful yeast strains.
- the yeast of the present invention can be used as a parent strain to produce a new yeast strain that has been further added or removed by backcrossing or mating with a mutant yeast strain or a wild yeast strain. You can also
- an isolated mannan close to the natural state can be provided by removing the protein portion near the natural state obtained by culturing the yeast of the present invention.
- FIG. 1 is a schematic diagram of plasmid YCp50-Chr.VII.
- FIG. 2 shows the chromosomal region used for plasmid shuffling to determine the mutated region involved in mannan protein release, and the rescue results for mannan release.
- FIG. 3 shows the hydrophobic region distribution of GpilOp.
- FIG. 4 is a systematic diagram of various mannan protein-releasing yeast strains that also derive the MTY9 strain.
- SEQ ID NOs: 1 to 16 PCR primers
Abstract
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BRPI0514764-6A BRPI0514764A (pt) | 2004-08-30 | 2005-08-29 | levedura que libera manoproteìnas contendo alfa-manana, e, métodos de produzir uma manoproteìna, e uma alfa-manana |
JP2006532650A JP5007879B2 (ja) | 2004-08-30 | 2005-08-29 | マンナンタンパク質を放出する酵母株およびマンナンタンパク質の製造法 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009075290A1 (ja) * | 2007-12-10 | 2009-06-18 | Oriental Yeast Co., Ltd. | 免疫賦活能を有する酵母、及び、食品又は飼料 |
WO2011118807A1 (ja) | 2010-03-26 | 2011-09-29 | アサヒビール株式会社 | 酵母の培養方法 |
WO2011145525A1 (ja) * | 2010-05-17 | 2011-11-24 | アサヒビール株式会社 | アラニン高含有調味料組成物 |
MD4216C1 (ro) * | 2012-08-15 | 2013-11-30 | Институт Микробиологии И Биотехнологии Академии Наук Молдовы | Tulpină de drojdii Saccharomyces cerevisiae - producătoare de manani |
JP2020509026A (ja) * | 2017-02-28 | 2020-03-26 | フエー・イー・ベー・フエー・ゼツト・ウエー | タンパク質の経口送達のための手段及び方法 |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009075290A1 (ja) * | 2007-12-10 | 2009-06-18 | Oriental Yeast Co., Ltd. | 免疫賦活能を有する酵母、及び、食品又は飼料 |
JP5315255B2 (ja) * | 2007-12-10 | 2013-10-16 | オリエンタル酵母工業株式会社 | 免疫賦活能を有する酵母、及び、食品又は飼料 |
US9127322B2 (en) | 2007-12-10 | 2015-09-08 | Oriental Yeast Co., Ltd. | Yeast having immunopotentiating capability and food or feed |
WO2011118807A1 (ja) | 2010-03-26 | 2011-09-29 | アサヒビール株式会社 | 酵母の培養方法 |
WO2011145525A1 (ja) * | 2010-05-17 | 2011-11-24 | アサヒビール株式会社 | アラニン高含有調味料組成物 |
CN102905556A (zh) * | 2010-05-17 | 2013-01-30 | 朝日集团控股株式会社 | 高含量含有丙胺酸的调味料组合物 |
MD4216C1 (ro) * | 2012-08-15 | 2013-11-30 | Институт Микробиологии И Биотехнологии Академии Наук Молдовы | Tulpină de drojdii Saccharomyces cerevisiae - producătoare de manani |
JP2020509026A (ja) * | 2017-02-28 | 2020-03-26 | フエー・イー・ベー・フエー・ゼツト・ウエー | タンパク質の経口送達のための手段及び方法 |
JP7186401B2 (ja) | 2017-02-28 | 2022-12-09 | フエー・イー・ベー・フエー・ゼツト・ウエー | タンパク質の経口送達のための手段及び方法 |
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JP5007879B2 (ja) | 2012-08-22 |
CN101018852A (zh) | 2007-08-15 |
BRPI0514764A (pt) | 2008-06-24 |
JPWO2006025295A1 (ja) | 2008-05-08 |
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