JP5398943B2 - ブチノールiエステラーゼ - Google Patents
ブチノールiエステラーゼ Download PDFInfo
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- JP5398943B2 JP5398943B2 JP2002524063A JP2002524063A JP5398943B2 JP 5398943 B2 JP5398943 B2 JP 5398943B2 JP 2002524063 A JP2002524063 A JP 2002524063A JP 2002524063 A JP2002524063 A JP 2002524063A JP 5398943 B2 JP5398943 B2 JP 5398943B2
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- Prior art keywords
- protein
- ester
- esterase
- unsubstituted
- optically active
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- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/14—Hydrolases (3)
- C12N9/16—Hydrolases (3) acting on ester bonds (3.1)
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- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P41/00—Processes using enzymes or microorganisms to separate optical isomers from a racemic mixture
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Description
a) FIETLGLERPVLVGHSLGGAIALAVGLDYPER (配列番号3)
b) IALIAPLTHTETEP (配列番号4)
c) GGGMMGLRPEAFYAASSDLV (配列番号5)
d) AIDAIFAPEPV (配列番号6)
(それぞれはアミノ酸の一文字表記で表され、各配列の最初のアミノ酸がアミノ末端に相当する)
に示されるアミノ酸部分配列を少なくとも1つ含んでなる、ブチノールIエステラーゼ活性を有するタンパク質、ならびに、ブチノールIエステラーゼ活性を有するその機能的等価体を提供することによって達成されることが見出された。
a)式I
R1-COO-R2 (I)
[式中、
R1は、直鎖または分岐鎖の、置換されていない、または一置換もしくは多置換されたC1-C10-アルキル、C2-C10-アルケニル、またはC2-C10-アルキニルであり、
R2は、直鎖または分岐鎖の、置換されていない、または一置換もしくは多置換されたC1-C10-アルキル、C2-C10-アルケニル、C2-C10-アルキニル、C7-C15-アラルキル、あるいは、単核または多核の、置換されていない、または一置換もしくは多置換された芳香族基であり、
R1および/またはR2は少なくとも1個の不斉炭素原子を含むが、
ここにおいて、特に好ましくは、エステル結合の炭素原子に結合したR1由来の炭素原子、またはエステル結合の酸素原子に結合したR2由来の炭素原子が不斉炭素原子である]
で表される光学活性エステルのエナンチオ選択的加水分解反応;および
b)上記式Iのエステルの、式II
R2-OH (II)
[式中、R2は上記意味の一つを有し、適切な場合は、少なくとも1個の不斉炭素原子を含むが、ここにおいて、特に好ましくは、OH基をもつ炭素原子が不斉炭素原子である]
で表される光学活性アルコールによるエナンチオ選択的エステル交換反応。
ブチノールIエステラーゼを発現するPseudomonas glumae突然変異体の選択
このスクリーニングの開始点は、リパーゼ産生株であるPseudomonas (Burkholderia) glumae Lu 8093であった。この菌株から得られたリパーゼにより、いくつかの興味のもてる反応を実施することができる(Balkenhohl, F.ら, J. prakt. Chem. 339, (1997), 381-384)。しかし、乳酸エステル、メチル酪酸エステルおよびフェニル酢酸エステルはこのリパーゼの基質ではなく、この菌株は他のどのような方法でもこれらのエステルを加水分解することができない。
Pseudomonas glumae Lu 2023の発酵
ブチノールIエステラーゼを得るために、Pseudomonas glumae Lu 2023を14Lのスケールで培養し、活性バイオマスを回収した。
温度 28℃
空気の供給 7L/分
攪拌 600rpm
発酵実施時間 約24時間
内臓pHおよびpO2の測定
Springer酵母自己分解物質65% 15 g/l
硫酸マグネシウム×7水 1.6 g/l
塩化カルシウム×2水 0.02 g/l
リン酸二水素カリウム 3.5 g/l
リン酸水素二カリウム 3.5 g/l
リン酸水素二アンモニウム 5 g/l
Pluriol P2000消泡剤 6 ml
Pseudomonas glumae Lu 2023からのブチノールIエステラーゼの精製
Pseudomonas glumae Lu 2023細胞(100 ml、湿重量:50 g)を3000rpm、4℃でガラスビーズミル(100mlのガラスビーズ、直径:0.5mm)で溶解した。遠心分離し(10,000rpm、30分)、ガラスビーズを洗浄した後、上清(300ml)を塩化マンガン沈澱(pH7〜7.5;最終濃度:50mM)に付した。もう一回遠心分離した後、上清をpH8.0に調整し、EDTAを50mMの濃度で添加した。この容量をQ-Sepharose(300ml)クロマトグラフィーで精製した。サンプルをアプライした後、カラムを50mM トリス/HClで洗浄した。対象となる画分を集めて、限外濾過(100 kDa)により濃縮した。分子ふるいクロマトグラフィー(直径:5cm、高さ:90cm;材料:S-300)にかけて非特異的エステラーゼからブチノールIエステラーゼを分離した。得られた活性画分は濁っており、再度濃縮した。このエステラーゼは明らかに膜に結合されていた。次いで、膜画分をまずプロテアーゼ(トリプシン、重量比:1:50から1:100)で消化した。これは、SDSポリアクリルアミドゲル電気泳動において2,3のバンドを別にすれば、膜画分から全タンパク質を消失させた。活性は保存されていた。上記バンドを未変性ゲル電気泳動(0.04%のSDS)で互いに分離し、活性アッセイにより未変性ゲル中のエステラーゼを同定した。このエステラーゼをゲルから溶出した後で、変性SDSポリアクリルアミドゲル電気泳動にかけたところ、きれいな1本のバンドとして現れた。
ブチノールIエステラーゼの固定化
固定化のために種々の方法を使用した。
1.ブチノールIエステラーゼは、ケイソウ土(kieselguhr)の存在下にアセトンで沈澱させることにより実質的に不活性化された。25mgのタンパク質を3.5gのケイソウ土(Merck)と混合し、1.4Lのアセトン(-20℃)を10分間添加した。その後、エステラーゼをローディングした担体をG3ガラス吸引フィルターにより分離し、フィルター残留物を冷アセトンで洗浄して、乾燥させた。
Pseudomonas glumae Lu 2023由来のブチノールIエステラーゼを用いたラセミ体分割
手順(標準混合物):
100単位のブチノールIエステラーゼを、リン酸バッファー(200ml、10mM、pH7.4)中で20mmolのブチノール酪酸エステル(酪酸1-メチルプロパ-2-イニル)と攪拌しながら反応させた。pHを絶えず測定して、水酸化ナトリウム溶液の添加により約pH7.4に維持した。サンプルを採取し、メチルt-ブチルエーテル(MTBE)で2回抽出し、有機相をGC(Chiraldex GTA)により分析した。ブチノールIエステラーゼを膜濾過により反応混合物から分離した。
抽出後、水相中の残留エステラーゼ活性はまだ50%ほど残っていた。
エステルの酸成分の大きさおよび疎水性/電荷に対するブチノールIエステラーゼ特異性の依存性
標準方法:
100単位のブチノールIエステラーゼを、リン酸バッファー(200ml、10mM、pH7.4)中で20mmolのブチノールエステルと攪拌しながら反応させた。pHを絶えず測定して、連続滴定により約pH7.0に維持した。サンプルを採取し、メチルt-ブチルエーテル(MTBE)で2回抽出し、有機相をGC(Chiraldex GTA)により分析した。
ラセミ体分割の質および反応速度は、酸成分の大きさおよび疎水性に依存していた。ブチノールIエステラーゼの最良の基質は、ブチノールの酪酸エステルとブチノールのメチル酪酸エステルであった。リパーゼはこれらの基質には不活性である。このことは、n-デカン酸ブチニルのような長鎖エステルにも当てはまる。
ブチノールIエステラーゼを用いる有機媒体中でのエステル交換
10mmolのラセミ体ブチノールと5mmolの酪酸ビニルを50mlのメチルt-ブチルエーテル(MTBE)中に溶解し、ケイソウ土に担持された9単位のブチノールIエステラーゼ(3.3g)と混合した。この混合物を室温で24時間振とうした。濾過後、溶媒を除去し、生成した混合物をGCにより特徴づけた。
メチルイソブチルケトン中では、(R)-ブチノール(16% ee)および(S)-ブチノールの酪酸エステル(52% ee)が43%の変換率で得られた。
表3は、ブチノールIエステラーゼを用いてエステルを交換したときのエナンチオマー過剰率が、交換されるエステルの酸成分に依存することを示している。
Claims (16)
- 配列番号2に示されるアミノ酸配列または少なくとも90%の相同性で配列番号2と相同なアミノ酸配列を含み、3−ブチン−2−オールと酸とのエステルをエナンチオ選択的に加水分解して(S)−3−ブチン−2−オールを生成する能力を有するタンパク質。
- SDSゲル電気泳動によって測定して40〜42 kDa、特に41.3 kDaの分子量を有するポリペプチド鎖を含む、請求項1に記載のタンパク質。
- 前記タンパク質が寄託番号DSM 13176を有するPseudomonas glumae(イネもみ枯細菌病菌)Lu 2023から得られる、請求項1または2に記載のタンパク質。
- 前記タンパク質が下記の反応の少なくとも1つを触媒する、請求項1〜3のいずれか1項に記載のタンパク質:
a)式I
R1-COO-R2 (I)
[式中、
R1は、直鎖または分岐鎖の、置換されていない、または一置換もしくは多置換されたC1-C10-アルキル、C2-C10-アルケニル、またはC2-C10-アルキニルであり、R2は、直鎖または分岐鎖の、置換されていない、または一置換もしくは多置換されたC1-C10-アルキル、C2-C10-アルケニル、C2-C10-アルキニル、C7-C15-アラルキル、あるいは、単核または多核の、置換されていない、または一置換もしくは多置換された芳香族基であり、R1および/またはR2は少なくとも1個の不斉炭素原子を含む]
で表される光学活性エステルのエナンチオ選択的加水分解反応;および
b)上記式Iのエステルの、式II
R2-OH (II)
[式中、R2は上記意味の一つを有し、適切な場合は、少なくとも1個の不斉炭素原子を含む]
で表される光学活性アルコールによるエナンチオ選択的エステル交換反応。
- 請求項1〜4のいずれか1項に記載のタンパク質をコードするポリヌクレオチド、またはそれに相補的なポリヌクレオチドであって、それぞれの場合に、配列番号1に示される核酸中の少なくとも30個の連続するヌクレオチド残基からなるヌクレオチド配列、または少なくとも30個の連続するヌクレオチド残基からなるそれに相補的なヌクレオチド配列を含む、前記ポリヌクレオチド。
- 少なくとも1つの調節核酸配列と機能的に連結された、少なくとも1つの請求項5に記載のポリヌクレオチドを含む発現カセット。
- 請求項5に記載のポリヌクレオチドまたは請求項6に記載の発現カセットを含む、真核または原核宿主細胞を形質転換するための組換えベクター。
- 請求項1〜4のいずれか1項に記載のタンパク質を生産する方法であって、該タンパク質を内因的に産生するシュードモナス属の微生物、または請求項7に記載のベクターで形質転換された微生物を培養し、該培養物から該タンパク質を単離することを含んでなる、上記方法。
- 前記微生物が寄託番号DSM 13176を有するPseudomonas glumae Lu 2023である、請求項8に記載の方法。
- 請求項8または9に記載の方法により得られる、請求項1〜4のいずれか1項に記載のタンパク質。
- 寄託番号DSM 13176を有するPseudomonas glumae Lu 2023。
- 請求項7に記載のベクターを含む微生物。
- 請求項1〜4のいずれか1項に記載のタンパク質を用いるエナンチオ選択的エステル加水分解法であって、
a)該タンパク質を、式I
R1-COO-R2 (I)
[式中、
R1は、直鎖または分岐鎖の、置換されていない、または一置換もしくは多置換されたC1-C10-アルキル、C2-C10-アルケニル、またはC2-C10-アルキニルであり、R2は、直鎖または分岐鎖の、置換されていない、または一置換もしくは多置換されたC1-C10-アルキル、C2-C10-アルケニル、C2-C10-アルキニル、C7-C15-アラルキル、あるいは、単核または多核の、置換されていない、または一置換もしくは多置換された芳香族基であり、R1および/またはR2は少なくとも1個の不斉炭素原子を含む]
で表される光学活性エステルの立体異性体混合物と接触させ、
b)該立体異性体のいずれかの立体選択的加水分解により生成する光学活性化合物および/または加水分解されないエステルエナンチオマーを反応媒体から取得する、
ことを含んでなる、上記方法。
- エナンチオ選択的エステル交換法であって、
a)式II
R2-OH (II)
[式中、R2は下記の式Iについて定義される意味の一つを有し、適切な場合は、少なくとも1個の不斉炭素原子を含む]
で表される光学活性アルコールの立体異性体混合物を、請求項1〜4のいずれか1項に記載のタンパク質の存在下に、式I
R1-COO-R2 (I)
[式中、
R1は、直鎖または分岐鎖の、置換されていない、または一置換もしくは多置換されたC1-C10-アルキル、C2-C10-アルケニル、またはC2-C10-アルキニルであり、R2は、直鎖または分岐鎖の、置換されていない、または一置換もしくは多置換されたC1-C10-アルキル、C2-C10-アルケニル、C2-C10-アルキニル、C7-C15-アラルキル、あるいは、単核または多核の、置換されていない、または一置換もしくは多置換された芳香族基であり、R1および/またはR2は少なくとも1個の不斉炭素原子を含む]
で表されるエステルと接触させ、未反応のアルコール立体異性体を反応媒体から取得する、または
b)上記式Iで表される光学活性エステルの立体異性体混合物を、請求項1〜4のいずれか1項に記載のタンパク質の存在下に、上記式IIで表されるアルコールと接触させ、該エステルに含まれる光学活性アルコールの立体異性体を反応媒体から取得する、
ことを含んでなる、上記方法。
- エステル交換反応のために、光学活性アルコールのアシル化剤としてビニルエステルを用いる、請求項14に記載の方法。
- 用いる反応媒体が有機溶媒である、請求項13、14または15に記載の方法。
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DE10042892.4 | 2000-08-31 | ||
DE10042892A DE10042892A1 (de) | 2000-08-31 | 2000-08-31 | Butinol I Esterase |
DE10131544A DE10131544A1 (de) | 2001-06-29 | 2001-06-29 | Butinol I Esterase |
DE10131544.9 | 2001-06-29 | ||
PCT/EP2001/010040 WO2002018560A2 (de) | 2000-08-31 | 2001-08-30 | Butinol i esterase |
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US7915085B2 (en) | 2003-09-18 | 2011-03-29 | Cree, Inc. | Molded chip fabrication method |
JP5225090B2 (ja) * | 2005-10-10 | 2013-07-03 | ビーエーエスエフ ソシエタス・ヨーロピア | 新規エステラーゼおよびブチノールエステルの速度論的分割法におけるその使用 |
US8969908B2 (en) | 2006-04-04 | 2015-03-03 | Cree, Inc. | Uniform emission LED package |
WO2008000738A1 (de) * | 2006-06-27 | 2008-01-03 | Basf Se | Proteine mit esterase-aktivität |
US10505083B2 (en) | 2007-07-11 | 2019-12-10 | Cree, Inc. | Coating method utilizing phosphor containment structure and devices fabricated using same |
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JP2542833B2 (ja) * | 1986-11-14 | 1996-10-09 | チッソ株式会社 | 光学活性なアルコ−ルおよびエステルの製造法 |
JP2542838B2 (ja) * | 1987-01-09 | 1996-10-09 | チッソ株式会社 | 光学活性な2級アルコ−ルとエステルの製造法 |
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US20050181472A1 (en) | 2005-08-18 |
CA2419275A1 (en) | 2002-03-07 |
RU2412996C2 (ru) | 2011-02-27 |
WO2002018560A2 (de) | 2002-03-07 |
EP1313860A2 (de) | 2003-05-28 |
EE05498B1 (et) | 2011-12-15 |
US8008051B2 (en) | 2011-08-30 |
ATE445702T1 (de) | 2009-10-15 |
MXPA03001333A (es) | 2003-06-06 |
AU2001284047B2 (en) | 2007-03-29 |
EP1313860B1 (de) | 2009-10-14 |
US20100196970A1 (en) | 2010-08-05 |
RU2008114032A (ru) | 2009-10-20 |
CN100379867C (zh) | 2008-04-09 |
JP2004507268A (ja) | 2004-03-11 |
US7531331B2 (en) | 2009-05-12 |
AU8404701A (en) | 2002-03-13 |
EE200300086A (et) | 2004-12-15 |
DE50115182D1 (de) | 2009-11-26 |
ES2333201T3 (es) | 2010-02-18 |
WO2002018560A3 (de) | 2002-10-31 |
RU2333958C2 (ru) | 2008-09-20 |
CN1449447A (zh) | 2003-10-15 |
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