WO2011078324A1 - 血圧降下作用を有する醤油及びその製造法 - Google Patents
血圧降下作用を有する醤油及びその製造法 Download PDFInfo
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- WO2011078324A1 WO2011078324A1 PCT/JP2010/073342 JP2010073342W WO2011078324A1 WO 2011078324 A1 WO2011078324 A1 WO 2011078324A1 JP 2010073342 W JP2010073342 W JP 2010073342W WO 2011078324 A1 WO2011078324 A1 WO 2011078324A1
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/17—Amino acids, peptides or proteins
- A23L33/18—Peptides; Protein hydrolysates
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
- A23L27/50—Soya sauce
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/12—Antihypertensives
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- the present invention relates to a soy sauce having no blood pressure lowering agent and having a blood pressure lowering effect. More specifically, the main feature of combining the use of low protease activity soy sauce koji and the warm digestion method of the soy sauce koji is that it contains a significant amount of antihypertensive peptide and has high angiotensin I converting enzyme inhibitory activity, blood pressure The present invention relates to soy sauce having a descending action and a method for producing the same.
- a renin-angiotensin system inhibitor for example, nicotianamine
- a switching nerve inhibitor for example, ⁇ -aminobutyric acid
- a method of adding a nitric oxide production promoting substance for example, isoflavone
- a diuretic substance for example, a vasodilator belonging to a calcium antagonist
- a method for adding a polyphenol for example, Patent Document 2
- a method of adding a peptide having angiotensin I-converting enzyme inhibitory activity see, for example, Patent Document 4
- soybean germ enriched in ⁇ -aminobutyric acid so that A method for generating and accumulating quantities (for example, see Patent Document 5) is known.
- soy sauce is a seasoning mainly composed of amino acids, and it is necessary to decompose proteins to peptides first, and peptides to further sufficiently decompose to amino acids. Therefore, in the soy sauce industry, it is necessary to search for and use koji molds that secrete powerful proteases, or to properly grow koji molds by appropriately processing koji molds to increase the enzyme power as much as possible. Has been paid.
- soy sauce production methods it is known to suppress the secretion of koji mold protease as much as possible during koji making, and to use soy sauce koji with low protease activity for the production of soy sauce having a blood pressure lowering effect.
- soy sauce cake is digested by heating at 45 to 60 ° C. for 3 to 8 hours to shorten the production period of the soy sauce (that is, quickly brew) (see, for example, Patent Document 6).
- soy sauce koji that promotes the production of protease and digesting the koji with heat, the moromi components, particularly proteins, are quickly degraded, and 50% of the total nitrogen is ⁇ -amino nitrogen. It is known to quickly brew excellent soy sauce.
- soy sauce manufacturing method it is not known to increase the peptide content to obtain soy sauce having a blood pressure lowering effect.
- peptides generally have functions such as endogenous opioid action, immunoregulatory action, calcium absorption promoting action, cholesterol elevation inhibiting action, angiotensin I converting enzyme (ACE) inhibitory action, antioxidant action, anticancer action, etc.
- ACE angiotensin I converting enzyme
- low-salt soy sauce containing 48 ⁇ g / ml and 32 ⁇ g / ml of antihypertensive peptides Gly-Tyr and Ser-Tyr, respectively, was continuously ingested by normal high blood pressure and mild hypertensives for 8 weeks. It is known that the systolic blood pressure value and the diastolic blood pressure value can be significantly reduced as compared with the general intake of low-salt soy sauce (see, for example, Non-Patent Document 3).
- soy sauce having a blood pressure lowering effect without adding an antihypertensive agent can be obtained. It is possible to obtain it, and it will be a great contribution to the soy sauce industry, but no such method is known.
- soy sauce koji when soy sauce koji is mixed with saline, the koji enzyme works well, decomposes protein and starch well, resulting in a rather thick and thick thick moromi, and the peptides produced and accumulated in the moromi soup are In the process of ripening moromi, it is further decomposed into amino acids, so that the peptides gradually disappear as moromi ripens.
- soy sauce cake obtained by squeezing soy sauce moromi contains an angiotensin converting enzyme inhibitory activity (hereinafter sometimes referred to as ACE inhibitory activity).
- ACE inhibitory activity angiotensin converting enzyme inhibitory activity
- peptides particularly antihypertensive peptides Gly-Tyr and Ser-Tyr are produced and accumulated in soy sauce moromi, angiotensin I converting enzyme inhibitory activity is high, and blood pressure lowering action is expected.
- the challenge is to obtain soy sauce.
- soy sauce cake with a protease activity of 20 to 300 U / g koji mixed with saline and digested by heating.
- a soy sauce containing a significant amount of the antihypertensive peptides Gly-Tyr and Ser-Tyr known to have a lowering action and having a high ACE inhibitory activity is obtained.
- this invention is the soy sauce which has the following blood pressure lowering effect
- a blood pressure lowering action obtained by a method comprising a step of preparing soy sauce moromi by mixing soy sauce mash having a protease activity of 20 to 300 U / g ⁇ and saline and a step of heating and digesting the soy sauce moromi. Having soy sauce.
- soy sauce according to (1) or (2) above, wherein the soy sauce having a blood pressure lowering action contains the antihypertensive peptide Gly-Tyr of 78 ⁇ g / ml or more and the antihypertensive peptide Ser-Tyr of 20 ⁇ g / ml or more.
- a food / beverage product having a blood pressure lowering effect comprising the soy sauce according to any one of (1) to (3).
- a soy sauce having a blood pressure lowering effect comprising a step of mixing soy sauce cake having a protease activity of 20 to 300 U / g and a salt solution to prepare soy sauce moromi, and a step of heating and digesting the soy sauce moromi. Manufacturing method.
- soy sauce koji including a step of mixing soy sauce koji with a protease activity of 20 to 300 U / g koji, a raw koji protein raw material, and saline to prepare soy sauce moromi, and a step of heating and digesting the soy sauce moromi And a method for producing soy sauce having blood pressure lowering action.
- step of warm digestion is a step of warm digestion of the soy sauce moromi at a product temperature of 45 to 55 ° C. for 1 to 5 days.
- the present invention is capable of producing and accumulating a large amount of peptides, particularly antihypertensive peptides Gly-Tyr and Ser-Tyr, in soy sauce moromi, without adding an antihypertensive agent, having high angiotensin I converting enzyme inhibitory activity, and an antihypertensive effect. Soy sauce can be easily obtained.
- the soy sauce cake to be used may be a soy sauce cake having a protease activity of 20 to 300 U / g koji obtained by adding a starchy material to a protein material, inoculating seed koji and koji making it.
- any soy sauce cake (generally, the soy sauce cake after the koji making contains 25 to 35% w / w of water) can be used.
- U / g koji refers to protease activity (U) per 1 g (wet weight) of soy sauce koji.
- the koji making time is less than 20 hours, the koji has almost no protease activity, so that the soy sauce raw material, particularly the nitrogen utilization rate is lowered, which is not preferable.
- the protease activity becomes high and the object of the present invention cannot be achieved.
- the above protein raw materials include soybean, defatted soybean, wheat gluten and the like.
- examples of the starchy material include wheat (wheat, barley, bare barley, and wheat) and rice.
- a protein raw material and a starch raw material are mixed to obtain a soy sauce koji raw material, and the mixing ratio is preferably 30:70 to 70:30, more preferably 40:60 to 60:40.
- the moisture is preferably 35 to 50% (w / w), more preferably 40 to 45% (w / w).
- seed meal examples include seed meals by Aspergillus oryzae used for soy sauce brewing such as Aspergillus soya and Aspergillus oryzae.
- salt water is mixed in the soy sauce cake (this may be hereinafter referred to as preparation) to prepare soy sauce moromi.
- the raw koji protein raw material vegetable-derived protein raw materials such as soybean and wheat gluten
- the ratio is preferably 20% (w / w) or less with respect to the soy sauce cake in order to approximate the flavor of the brewed soy sauce.
- the salt solution is calculated so that the salt concentration of the moromi mash is 5 to 20% (w / v), preferably 8 to 16% (w / v). Mix between% and 300% (v / w).
- this mixture is placed in a temperature-controllable container and subjected to warm digestion.
- warm digestion is also important, and when warm digestion is not performed, peptides produced and accumulated in moromi juice, particularly antihypertensive peptides Gly-Tyr and Ser-Tyr, are further added in the process of fermenting ripening of moromi. It is not preferable because it is decomposed into amino acids and gradually disappears.
- the warm digestion of soy sauce moromi is preferably performed at 45 to 55 ° C. for 1 to 5 days.
- the temperature is less than 45 ° C. or the time is short, the peptides produced in the moromi gradually disappear as the aging of the moromi progresses, and the content of the peptide eventually decreases, which is not preferable.
- the temperature exceeds 55 ° C. or if the period exceeds 5 days, the digestive juice (soy sauce) is darkened, and a warm odor (unusual odor) is attached to deteriorate the flavor.
- the hot-digested moromi can be used as it is as a soy sauce-like seasoning (this “soy sauce-like seasoning” is also one of the embodiments of the “soy sauce” of the present invention).
- the hot-digested moromi can be appropriately used as the soy sauce of the present invention after being subjected to compression filtration, burning, ore-drawing (clarification treatment) and the like by conventional methods.
- this warm-digested moromi is prepared by adjusting the salt content so that the salt of the moromi mash juice after fermentation ripening is contained in 12 to 20% (w / v), and then inoculating the moromi with soy lactic acid bacteria. After sufficiently propagating lactic acid bacteria and performing lactic acid fermentation, or inoculating soy sauce yeast on the moromi to sufficiently propagate yeast and performing alcoholic fermentation, or after performing the lactic acid fermentation and alcoholic fermentation in this order, When aging, it is preferable because the flavor is better than immediately after digestion with heating.
- the moromi product temperature is kept at 20 to 30 ° C. and the pH is 4.7 to 5.3, for example, for about 7 to 60 days. Breed and ferment.
- the moromi product temperature is 20 to 35 ° C.
- the alcohol has a sufficient time to be about 0.5 to 4% (v / v), for example, about 7 to 90 days. Allow to ferment and mature.
- the soy sauce obtained in the present invention is soy sauce having an ACE inhibitory activity (IC 50 value) of 3.0 ⁇ l / ml or less.
- IC 50 value ACE inhibitory activity
- the antihypertensive peptide Gly-Tyr contains 78 ⁇ g / ml or more and the antihypertensive peptide Ser-Tyr contains 20 ⁇ g / ml or more, so that an antihypertensive action can be expected.
- the upper limit of the concentration of Gly-Tyr and Ser-Tyr in the soy sauce obtained in the present invention is 300 ⁇ g / ml.
- the soy sauce of the present invention is used as it is (in a liquid state) or freeze-dried, spray-dried, drum-dried or the like by conventional methods to obtain a paste, solid or powder, and then various soups (noodle soup, etc.) ), Sauce (baked meat sauce, etc.), ponds, sauces, dressings, soups and other liquid seasonings, and fishery and livestock meat products (boiled rice, ham, etc.) foods are expected to lower blood pressure You can get those foods and drinks.
- Yamamoto's method Japanese Journal of Thoracic Diseases, 1980, (20) P.297-302, examination of a method for measuring serum angiotensin converting enzyme activity).
- ACE inhibitory activity (IC 50 value) can be measured by the following procedure.
- the soy sauce of the present invention is passed through a solid-phase extractor filled with a reverse-phase solid-phase extractant, washed with a 0.1 (v / v)% trifluoroacetic acid (TFA) aqueous solution, and the nicotianamine fraction is obtained.
- TFA trifluoroacetic acid
- a 60% (v / v) acetonitrile (containing 0.1 (v / v)% TFA) aqueous solution is passed through the solid-phase extractor to elute the peptide;
- the eluate is concentrated to dryness by centrifugation and redissolved with ultrapure water to obtain a sample (peptide fraction);
- the concentration obtained by converting the concentration of the sample giving an ACE inhibition rate of 50% in the enzyme reaction system by ACE into the concentration as soy sauce before the treatment by the solid-phase extractor is defined as the ACE inhibitory activity (IC 50 value) of soy sauce.
- soy sauce yeast (Chigosaccharomyces rouxii) was added to 5 ⁇ 10 5 pieces / g moromi, and aerated at a moromi product temperature of 25 ° C. in a timely manner, followed by fermentation ripening for 1 month.
- this matured moromi is squeezed and filtered, and the resulting deep-fried soy sauce is soaked at 80 ° C. for 30 minutes, placed in a clarification tank and clarified for 3 days. Obtained.
- the nitrogen utilization rate, component analysis value, antihypertensive peptide and ACE inhibitory activity (IC 50 value) of the soy sauce obtained were measured according to the following method. The results are shown in Table 1 and FIG.
- soy sauce contains nicotianamine as a ACE inhibitor in addition to peptides. Therefore, the ACE inhibitory activity (IC 50 value) measurement method is a solid phase packed with a reversed-phase solid-phase extraction agent (for example, octadecylsilylated silica gel) in order to accurately measure the ACE inhibitory activity caused by the soy sauce peptide.
- a reversed-phase solid-phase extraction agent for example, octadecylsilylated silica gel
- Pretreatment using an extractor for example, a reverse-phase solid-phase extraction cartridge column (such as Sep-Pak Plus C18 manufactured by Waters) was performed, the nicotianamine fraction was removed from soy sauce, and the removed solution was subjected to analysis. Thereby, the ACE inhibitory activity resulting from this peptide of soy sauce can be analyzed accurately.
- Nitrogen utilization rate measurement method of soy sauce It was measured with reference to the soy sauce test method (Japan Soy Sauce Research Institute, issued on March 1, 1985) and the moromi nitrogen dissolution utilization rate.
- the reaction is carried out at a pH of 7.0 using milk casein as a substrate, the produced non-protein substance is measured by the Folin color method, and the amount of enzyme that releases the non-protein substance corresponding to 1 ⁇ g of tyrosine per minute is set to 1 Unit. And calculated as per g of soy sauce cake.
- NaCl was measured according to the soy sauce test method (Japan Soy Sauce Research Institute, issued on March 1, 1985).
- step (b) 5 ml of a 60% (v / v) acetonitrile (containing 0.1 (v / v)% TFA) aqueous solution was flowed through the column to elute the peptide, and the eluate was concentrated by concentration to dryness, and then 1 ml of ultrapure water.
- the sample (peptide fraction) was redissolved in step (b).
- ACE Color Kit manufactured by Fujirebio Inc.
- ACE inhibition rate is expressed by the following equation.
- ACE inhibition rate (%) [1 ⁇ (OD S ⁇ OD Sb ) / (OD C ⁇ OD Cb )] ⁇ 100
- OD S 505 nm is measured as described above at this time
- OD Sb is the absorbance at the time of addition of 200mM borate buffer pH8.3 instead of the enzyme solution, instead of OD C Sample solution Ultra Absorbance when pure water is added
- ODCb is the absorbance when 200 mM borate buffer pH 8.3 is added instead of the enzyme solution, and ultrapure water is added instead of the sample solution.
- the concentration of the stock solution ( ⁇ l / ml) giving a 50% enzyme activity inhibition rate is the IC 50 value, and the concentration of the undiluted solution before the treatment with the Sep-Pak column. Expressed in terms of conversion.
- soy sauce cake with 20 to 300 U / g koji has (1) a nitrogen utilization rate of 65 to 86%, and (2) antihypertensive peptide Gly-Tyr of 78 ⁇ g / ml or more.
- Soy sauce containing Ser-Tyr of 20 ⁇ g / ml or more is obtained, and (3) ACE inhibitory activity (IC 50 value) is 3.0 ⁇ l / ml or less, that of commercial low-salt soy sauce (6.7 ⁇ l / ml).
- a soy sauce having a very strong ACE inhibitory activity can be obtained.
- This moromi was pressed and filtered as it was (without performing lactic acid fermentation and yeast fermentation aging), and fired and clarified to obtain the heated digested soy sauce of the present invention 8 and the present invention 9.
- soy sauce koji having high protease activity that is, having a value of 650 U / g koji
- moromi ingredients, particularly proteins are rapidly decomposed, and soy sauce ingredients are quickly produced.
- the utilization rate, particularly the nitrogen utilization rate can be improved to about 85%, and the production period of soy sauce can be shortened (ie, quickly brewed), but it contains a significant amount of antihypertensive peptides Gly-Tyr and Ser-Tyr, It can be seen that soy sauce with high ACE inhibitory activity cannot be obtained.
- soy sauce cake with low protease activity that is, having a value of 80 U / g 2 or 235 U / g ⁇ ⁇
- the nitrogen utilization rate is A soy sauce of about 70 to 75% can be obtained in a short time, and it contains a significant amount of antihypertensive peptides Gly-Tyr and Ser-Tyr, which are conventionally known to have a blood pressure lowering action, and has a high ACE inhibitory activity.
- Experimental example 1 (Test for confirming the effect of soy sauce lees on protease activity and the presence or absence of warm digestion on soy sauce peptide growth) About three types of soy sauces obtained by the following soy sauce manufacturing method, nitrogen utilization rate, component analysis value, antihypertensive peptide and ACE inhibitory activity were measured by the method described in Example 1. The results are shown in Table 3.
- Example 2 the saline activity was adjusted so that the protease concentration prepared in Example 1 was 0.8 kg of soy sauce cake with 130 U / g ⁇ (test group 6) and the final moromi soup had a salt concentration of 15.5% (w / v). About 1.2 liters was mixed, 1 ⁇ 10 5 lactic acid bacteria (Tetragenococcus halophyllus) per 1 g of moromi were added, and lactic acid fermentation was carried out at 20 ° C. for 1.5 months to obtain soy sauce moromi having a pH of about 5.2. .
- salt-resistant soy sauce yeast (Tigo Saccharomyces rouxi) was added to 5 ⁇ 10 5 pieces / g moromi, and aerated at a moromi product temperature of 25 ° C. in a timely manner as usual. went. Subsequently, this moromi was squeezed and filtered, fired according to a conventional method, and clarified to obtain a soy sauce of Comparative Example 5 having a good flavor.
- Soy sauce was produced using a high protease soy sauce koji without performing thermal digestion.
- soy sauce koji with a protease activity of 650 U / g ⁇ (test section 10) prepared in Example 1 and a saline solution so that the salt concentration of the final moromi mash is 15.5% (w / v).
- a saline solution so that the salt concentration of the final moromi mash is 15.5% (w / v).
- About 1.2 liters was mixed, 1 ⁇ 10 5 lactic acid bacteria (Tetragenococcus halophyllus) per 1 g of moromi were added, and lactic acid fermentation was carried out at 20 ° C. for 1.5 months to obtain soy sauce moromi having a pH of about 5.2. .
- salt-resistant soy sauce yeast (Tigo Saccharomyces rouxi) was added to 5 ⁇ 10 5 pieces / g moromi, and aerated at a moromi product temperature of 25 ° C. in a timely manner as usual. went.
- this moromi was squeezed and filtered, fired according to a conventional method, and clarified to obtain a soy sauce of Comparative Example 6 having good flavor (hereinafter referred to as a soy sauce obtained by a conventional method).
- GY means the antihypertensive peptide Gly-Tyr
- SY means the antihypertensive peptide Ser-Tyr
- soy sauce cake with low protease activity is used and digested at a high temperature. Therefore, peptides produced and accumulated in soy sauce moromi mash, particularly antihypertensive peptides Gly-Tyr and Ser-Tyr. Can be retained in the moromi soup until it reaches the final moromi through lactic acid fermentation and yeast fermentation aging.
- Experimental example 2 Comparison of peptide content of soy sauce of the present invention 3 and soy sauce obtained by a conventional method
- the soy sauce of the present invention 3 see Example 1
- the soy sauce obtained by a conventional method see the soy sauce of Comparative Example 6 obtained in Experimental Example 1
- HPLC high performance liquid chromatography
- Detection was an absorbance at 220 nm.
- FIGS. 2 and 3 The measurement results of the peptide content of the soy sauce of the present invention 3 and the soy sauce obtained by a conventional method are shown in FIGS. 2 and 3, respectively.
- FIGS. 2 and 3 large peaks at 14 minutes, 18 minutes, and 27 minutes are It was confirmed that the amino acids were Tyr, Phe, and Trp, respectively. It was also confirmed that the other amino acids were hardly retained in this column and eluted in 5 minutes or less. Therefore, most of the peaks observed other than the large peaks at 14 minutes, 18 minutes, and 27 minutes are presumed to be derived from peptides.
- the soy sauce of the present invention 3 has a larger number of peptides and their amounts than the soy sauce obtained by a conventional method.
- the antihypertensive peptides Gly-Tyr and Ser-Tyr are much more than the soy sauce obtained by the conventional method.
- soy sauce yeast (Chigosaccharomyces rouxii) was added to 5 ⁇ 10 5 pieces / g moromi, aerated at a moromi product temperature of 25 ° C. in a timely manner, and fermented for 1 month.
- soy sauce yeast (Chigosaccharomyces rouxii) was added to 5 ⁇ 10 5 pieces / g moromi, and aerated at a moromi product temperature of 25 ° C. in a timely manner, followed by fermentation ripening for 1 month.
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Abstract
Description
次いで前記固相抽出器に60%(v/v)アセトニトリル(0.1(v/v)%TFA含有)水溶液を通液させ、ペプチドを溶出させる;
溶出液を遠心濃縮乾固し、超純水で再溶解してサンプル(ペプチド画分)を得る;
ACEによる酵素反応系において50%のACE阻害率を与える前記サンプルの濃度を、前記固相抽出器による処理前の醤油としての濃度に換算した濃度を、醤油のACE阻害活性(IC50値)とする。
脱脂加工大豆14kgに80℃の温水を130%(w/w)撒水し、これを飽和水蒸気により蒸煮圧力2kg/cm2(ゲージ圧力)で20分間加圧加熱蒸煮し、蒸煮脱脂大豆を得た。
醤油試験法(財団法人 日本醤油研究所、昭和60年3月1日発行)、諸味の窒素溶解利用率を参照にして測定した。
醤油試験法(財団法人 日本醤油研究所、昭和60年3月1日発行)、酵素活性測定法(全プロテアーゼ)を参照にして測定した。
可溶性総窒素(TN)はケルテックオートサンプラーシステム1035(アクタック社製)を用い、常法に従って測定した。
LC-MS/MSシステム2695-QuattroMicro API(Waters社製)を用い、添加検量線法により求めた。
サンプル100μlをSep-Pak (登録商標) Plus C18 Environmental Cartridges(Waters社製)に供し、0.1(v/v)%トリフルオロ酢酸(TFA)水溶液4mlで洗浄し、ニコチアナミン画分を除去した。
なお、このときのODSは上記のとおり測定した505nmの吸光度、ODSbは酵素溶液の代わりに200mMホウ酸バッファーpH8.3を加えたときの吸光度であり、ODCはサンプル溶液の代わりに超純水を加えたときの吸光度、ODCbは酵素溶液の代わりに200mMホウ酸バッファーpH8.3、サンプル溶液の代わりに超純水を加えたときの吸光度である。
実施例1で調製したプロテアーゼ活性が80U/g麹(試験区4)及び235U/g麹(試験区7)の醤油麹0.8kgに、消化後の諸味液汁の食塩濃度が13.0%(w/v)となるように食塩水約1.2リットルを混合し、適宜撹拌しつつ諸味品温50℃で72時間消化し、消化諸味を得た。
(醤油麹のプロテアーゼ活性と、加温消化の有無が及ぼす、醤油ペプチド消長への影響確認試験)
下記醤油の製造法により得られた3種類の醤油について、窒素利用率、成分分析値、降圧ペプチド及びACE阻害活性を、実施例1に記載の方法で測定した。その結果を表3に示す。
(2)比較例5の醤油の製造法
低プロテアーゼ醤油麹を用い、加温消化を行うことなく醤油を製造した。
高プロテアーゼ醤油麹を用い、加温消化を行うことなく醤油を製造した。
(本発明3の醤油と、常法により得た醤油のペプチド含量の比較)
本発明3の醤油(実施例1参照)と、常法により得た醤油(実験例1で得られた比較例6の醤油参照)とを、それぞれCAPCELL PAK C18 MGIIIカラム(4.6×250mm、資生堂社製)を接続した高速液体クロマトグラフィー(以下HPLCと略す、島津製作所社製)で分析した。
上記実施例1で調製したプロテアーゼ活性が235U/g麹の醤油麹(試験区7)0.8kgに、消化後の諸味液汁の食塩濃度が13.0%(w/v)となるように食塩水約1.2リットルを混合して醤油諸味を調製した。
実施例1で調製したプロテアーゼ活性が80U/g麹の醤油麹(試験区4)0.8kgに、消化後の諸味液汁の食塩濃度が13.0%(w/v)となるように食塩水約1.2リットルを混合し、適宜撹拌しつつ諸味品温50℃で72時間消化し、消化諸味を得た。
以上のことから、本発明によれば高温消化後、乳酸発酵を行っても、降圧ペプチドを高濃度に含有し、風味良好な醤油が得られることが判る。
実施例1で調製したプロテアーゼ活性が80U/g麹の醤油麹(試験区4)0.8kgに、消化後の諸味液汁の食塩濃度が13.0%(w/v)となるように食塩水約1.2リットルを混合し、適宜撹拌しつつ諸味品温50℃で72時間消化し、消化諸味を得た。
以上のことから、本発明によれば高温消化後、酵母発酵を行っても、降圧ペプチドを高濃度に含有し、風味良好な醤油が得られることが判る。
実施例1で調製したプロテアーゼ活性が235U/g麹の醤油麹(試験区7)0.8kgに、蒸煮脱脂大豆0.16kg(醤油麹に対して20%w/wに相当)を添加し、また消化後の諸味液汁の食塩濃度が13.0%(w/v)となるように食塩水約1.4リットルを混合し、適宜撹拌しつつ諸味品温50℃で72時間消化し、消化諸味を得た。
本明細書で引用した全ての刊行物、特許および特許出願をそのまま参考として本明細書にとり入れるものとする。また本明細書は本願の優先権の基礎である日本国特許出願2009-295466号の明細書および/または図面に記載される内容を包含する。
Claims (8)
- プロテアーゼ活性が20~300U/g麹の醤油麹と食塩水とを混和し醤油諸味を調製する工程と、
前記醤油諸味を加温消化する工程と
を含む方法により得られる、血圧降下作用を有する醤油。 - アンジオテンシンI変換酵素(ACE)阻害活性(IC50値)が3.0μl/ml以下である、請求項1に記載の醤油。
- 降圧ペプチドGly-Tyrを78μg/ml以上、降圧ペプチドSer-Tyrを20μg/ml以上含有する請求項1又は請求項2に記載の醤油。
- 請求項1~請求項3のいずれかに記載の醤油を含有する飲食品。
- プロテアーゼ活性が20~300U/g麹の醤油麹と食塩水とを混和し醤油諸味を調製する工程と、
前記醤油諸味を加温消化する工程と
を含む、血圧降下作用を有する醤油の製造法。 - プロテアーゼ活性が20~300U/g麹の醤油麹と、未製麹蛋白質原料と、食塩水とを混和し醤油諸味を調製する工程と、
前記醤油諸味を加温消化する工程と
を含む、血圧降下作用を有する醤油の製造法。 - 加温消化する工程が、前記醤油諸味を品温45~55℃で、1~5日間加温消化を行う工程である、請求項5又は6に記載の醤油の製造法。
- 加温消化する工程によって加温消化された醤油諸味に醤油乳酸菌及び/又は醤油酵母を添加し、発酵熟成を行なう工程を更に含む、請求項5~請求項7のいずれかに記載の醤油の製造法。
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