JP2004073199A - Monascuspurpureus変異体、および血圧低下活性を有する発酵産物を調製する際のその使用 - Google Patents
Monascuspurpureus変異体、および血圧低下活性を有する発酵産物を調製する際のその使用 Download PDFInfo
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Abstract
【解決手段】 本発明は、Monascus purpureusの変異体を提供し、この変異体は、コメ粉末60g/l、ダイズ粉末30g/lおよびMgSO4・7H2O 5g/lを含む培地中で培養した場合に、1.0ppm未満の量のシトリニンと共に、0.03mg/mlに達するGABA濃度で発酵産物を生成する。1つの実施形態において、Monascus purpureus CCRC 31499の変異体が提供される。
【選択図】 なし
Description
本発明は、Monascus purpureusの新規変異体を提供し、この変異体は、任意のさらなる処理工程なしに、安価な天然原材料を含む固体または液体の培地中で、血圧低下活性を有する発酵産物を生成し、そしてこの産物は、少量のシトリニンを含有する。
本発明は、Monascus purpureusを変異させ、そしてそれらをスクリーニングすることによって得られたMonascus purpureusの変異体を提供する。この変異体は、60g/lのコメ粉末、30g/lのダイズ粉末およびMgSO4・7H2O 5g/lを含む培養培地中でインキュベートされ、発酵産物中のGABAの量が0.03mg/mlまでの場合に、シトリニンの量が1ppm未満、好ましくは0.5ppm未満、そして最も好ましくは0.15ppm未満である。
(1)GABAの定量的分析
この株の発酵液0.6mlと0.6ml LaCl3との混合物を、湯浴中にて60℃で30分間インキュベートした。この混合物を遠心分離し、そして0.1mlの上清を、水850μl中の50μlのKOH(1M)と5分間反応させた。この反応産物を遠心分離し、そして上清を保存した。
以下のHPLC分析手順を使用して、この株の発酵液中のシトリニンの量を決定した。7mlの発酵液を、3.5のpHに調整し、次いで1時間インキュベートした。3mlの酢酸エチルをこの液体に添加し、そして30分後に、酢酸エチル層を回収した。添加工程および酢酸エチル回収工程を、2回繰り返し、次いで、回収した溶液を乾燥した。
Monascus purpureus株CCRC31499を、PDA(ジャガイモ由来の浸剤(infusion)20%、Bacto Dextrose 2%および寒天2%)の傾斜培地上に接種し、そして30℃で7日間インキュベートした。この胞子を、滅菌水で洗浄して除いた。この収集した胞子懸濁物(1ml当たり、1×107を超える胞子を含む)に、UV光を2分間照射した。連続希釈後、希釈した胞子懸濁サンプルを、PDAプレート上に広げ、そして30℃で2〜3日インキュベートした。次いで、コロニーを、コメ粉末60g/l、ダイズ粉末30g/lおよびMgSO4・7H2O 5g/lを含む培地中に接種して、変異体の安定性を試験し、そして生成されたGABAおよびシトリニンの量を決定した。
(CYA培地(スクロース30g/l、NaNO3 3g/l、K2HPO4 1.0g/l、MgSO4 0.5g/l、KCl 0.5g/l、FeSO4 0.01g/l、酵母抽出物 1g/lおよび寒天 15g/lを含有する))
7日間の培養後、コロニーは、黄みがかったオレンジ色を呈し、そして11mm〜14mmの直径を有し、そして気菌糸の色は、白色であった。
7日間の培養後、コロニーは、赤みがかったオレンジ色を呈し、そして28〜30mmの直径を有した。
(CYA培地(スクロース 30g/l、NaNO3 3g/l、K2HPO4 1.0g/l、MgSO4 0.5g/l、KCl 0.5g/l、FeSO4 0.01g/l、酵母抽出物 1g/lおよび寒天 15 g/lを含有する))
7日間の培養後、コロニーは、黄みがかったオレンジ色を呈し、そして13mm〜14mmの直径を有し、そして気菌糸は、短く、小さく、そして非常に少ししか見出されなかった。
7日間の培養後、コロニーは、赤みがかったオレンジ色を呈し、そして29〜30mmの直径を有し、そして気菌糸は、短く、小さく、そして非常に少ししか見出されなかった。
実施例2に記載される方法に従って、異なるpH値の下で、コメ粉末80g/l、酵母抽出物10g/lおよびグルタミン酸10g/lを含有する培地中で培養した変異株の発酵液サンプルのGABAおよびシトリニンの量を分析した。結果を表2に示し、これは、異なるpH条件下で培養した変異株Monascus purpureus M022およびM1033が、非常に少量(0.15ppm未満)のシトリニンと共に、多量のGABAを生成できたことを実証する。
Claims (26)
- Monascus purpureusの変異体であって、コメ粉末60g/l、ダイズ粉末30g/lおよびMgSO4・7H2O 5g/lを含む培地中で培養した場合に、1.0ppm未満の量のシトリニンと共に、0.03mg/mlに達するGABA濃度で発酵産物を生成する、変異体。
- Monascus purpureus CCRC 31499の変異体である、請求項1に記載の変異体。
- 請求項2に記載の変異体であって、American Type Culture Collectionに受託番号PTA−4486で寄託されたMonascus purpureus M022と同一の特徴を有するか、またはAmerican Type Culture Collectionに受託番号PTA−4485で寄託されたMonascus purpureus M1033と同一の特徴を有する、変異体。
- American Type Culture Collectionに受託番号PTA−4486で寄託されたMonascus purpureus M022である、請求項3に記載の変異体。
- American Type Culture Collectionに受託番号PTA−4485で寄託されたMonascus purpureus M1033である、請求項3に記載の変異体。
- 発酵産物を生成するための方法であって、該方法は、請求項1に記載の変異体を適切な条件下で培養することによって特徴付けられ、該発酵産物は、GABAを含み、そして該発酵産物に含まれるシトリニンの量は、1.0ppm未満である、方法。
- 前記発酵産物が、血圧低下活性を有する、請求項6に記載の方法。
- 前記変異体が、固体培地または液体培地において培養される、請求項6に記載の方法。
- 前記培地のpH値が、3〜9の間である、請求項8に記載の方法。
- 前記培地のpH値が、5〜7の間である、請求項9に記載の方法。
- 前記発酵産物中のシトリニンの量が、0.5ppm未満である、請求項6に記載の方法。
- 前記発酵産物中のシトリニンの量が、0.15ppm未満である、請求項11に記載の方法。
- 前記発酵産物が、薬学的組成物の活性成分または食品添加物として使用され得る、請求項7に記載の方法。
- 血圧低下活性を有する前記成分を精製して、精製された成分を得る精製工程をさらに包含する、請求項7に記載の方法。
- 請求項1に記載の変異体によって生成される発酵産物によって調製され、該発酵産物中のシトリニンの量が、1.0ppm未満である、薬学的組成物。
- 血圧を低下させる際の使用のための、請求項15に記載の薬学的組成物。
- 前記発酵産物中のシトリニンの量が、0.5ppm未満である、請求項15に記載の薬学的組成物。
- 前記発酵産物中のシトリニンの量が、0.15ppm未満である、請求項17に記載の薬学的組成物。
- 請求項6に記載の方法によって生成される発酵産物によって調製される、請求項15に記載の薬学的組成物。
- さらに精製された発酵産物により調製される、請求項19に記載の薬学的組成物。
- 請求項1に記載の変異体によって生成される発酵産物によって調製される、食品添加物であって、該発酵産物中のシトリニンの量が、1.0ppm未満である、食品添加物。
- 血圧低下活性を有する、請求項21に記載の食品添加物。
- 前記発酵産物中のシトリニンの量が、0.5ppm未満である、請求項21に記載の食品添加物。
- 前記発酵産物中のシトリニンの量が、0.15ppm未満である、請求項23に記載の食品添加物。
- 請求項6に記載の方法によって生成される発酵産物によって調製される、請求項21に記載の食品添加物。
- さらに精製された発酵産物により調製される、請求項25に記載の食品添加物。
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KR100710497B1 (ko) * | 2005-05-18 | 2007-04-23 | 고려대학교 산학협력단 | 홍국균을 이용한 gaba 생산방법 |
CN110408545B (zh) * | 2019-03-21 | 2021-05-07 | 广东天益生物科技有限公司 | 一种紫红曲菌种及由其制备红曲粉的方法和制品 |
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