JP2021531036A - ポリウレタンの酵素的分解のための新規なウレタナーゼ - Google Patents
ポリウレタンの酵素的分解のための新規なウレタナーゼ Download PDFInfo
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Abstract
Description
用語「ポリペプチド」は当業者によく知られている。それは、ペプチド結合によって互いに連結された少なくとも50個、好ましくは少なくとも70個のアミノ酸の鎖を指す。ポリペプチドは、天然に存在するアミノ酸及び合成アミノ酸の両方を含み得る。それは、公知のタンパク質原性のアミノ酸を含むことが好ましい。
用語「ウレタナーゼ活性」とは、ウレタン基の切断を酵素的に触媒するポリペプチドの能力を指す。このプロセスでは、各1モルのウレタン基から、1モルのアミン、1モルのアルコール、及び1モルのCO2が生じる。
用語「ウレタン基の酵素的切断」とは、同じ反応条件下において、酵素なしで反応バッファーと共にインキュベートした場合、又は同じ条件下において、不活性ポリペプチドの存在下で反応バッファーと共にインキュベートした場合よりも、ウレタナーゼ活性を有するポリペプチドの存在下で、上記のウレタン基の切断がより迅速に進行することを示す。不活性ポリペプチドの好ましいモデルはウシ血清アルブミンである。もし、それ以外の点では同一であるBSAを用いた対照よりも、試験されるポリペプチドの存在下で、ウレタン基の切断がより迅速に進行する場合には、そのポリペプチドは、本明細書において理解されているようなウレタナーゼ活性を有する。
さらなる実施形態において、本発明は、配列番号3、配列番号2、配列番号4、配列番号5、配列番号6、配列番号8、配列番号10、及びそのポリペプチドのバリアントからなる群から選択されるアミノ酸配列を有するポリペプチド、又は配列番号7における規定されるアミノ酸配列を有するGatA類似ポリペプチド若しくはそのバリアントの使用であって、前記ポリペプチドが、ウレタン結合の酵素的切断においてウレタナーゼ活性を有することを特徴とする、前記使用に関する。
さらなる実施形態において、本発明は、ポリエステル−ポリウレタン(Polyester-Polyurethanen)を低分子量の分解生成物へと分解するためのプロセスであって、
(a)ポリエステル−ポリウレタン中に存在するエステル基を切断するステップ;及び
(b)ウレタナーゼ活性をもつポリペプチドにより、ポリエステル−ポリウレタンに存在するウレタン基を切断するステップ
を含み、
プロセスステップ(a)及び(b)は、順番に、又は並行して実施される、前記プロセスに関する。
(a)ポリエステル−ポリウレタン中に存在するエステル基を切断するステップ;並びに
(b)ウレタナーゼ活性を有し、配列番号1〜配列番号10からなる群から選択されるアミノ酸配列、及び上述の配列と少なくとも90 %の配列同一性を有するアミノ酸配列を有するポリペプチドにより、ポリウレタンを処理するステップ
を含み、
プロセスステップ(a)並びに(b)は、順番に、又は並行して実施される、前記プロセスに関する。
(i)感心あるポリウレタンの生成に使用されるイソシアネートに由来するアミン(例えば、トリレン-2,4-ジイソシアネートの場合、トリレン-2,4-ジアミン);及び
(ii)関心のあるポリウレタンの合成に採用されるポリエステルポリオールの形成のために使用されるアルコール及びカルボン酸
である。
ENPCを用いた酵素活性の試験
0.2 mg/mlのENPCを、「MTS 2/4」プレートシェーカー(IKA社、シュタウフェン)上において、6.25体積%のエタノールを含むpH 7.0の100mM KH2PO4/K2HPO4中で、900 rpm、室温で24時間かけてインキュベートした。
オートサンプラー、及び紫外線と可視光領域を対象としたDAD(ダイオードアレイ検出器)を搭載した、アジレント・テクノロジー社(サンタクララ、米国)1100シリーズの装置を用いて高圧液体クロマトグラフィーを実施した。全ての測定は、粒径3.5μm、寸法4.6×75 mmの「ゾルバックスXDB-C18」カラム(Agilent Technologies社、サンタクララ、米国)を用いて実施した。全ての方法において、試料5μLを40℃に加温したカラムに注入した。流速は概して1.5 ml/minであった。逆相カラムを使用しているため、全ての方法における溶出は、有機溶媒の濃度を増加して行っている。
t[分] AcN
0 5
6.5 85
8.0 5
10.0 5
t[分] % AcN(+5 %(v/v)dd H2O)
0 5
6.5 90
8.0 5
10.0 5
t[分] % メタノール
0 5
2.5 35
8.0 70
8.5 85
10.0 5
12.0 5
試験はENPCについての記載にしたがって実施した。形成されたフェネチルアミンは、上記のようにHPLCによって検出した。
ウレタナーゼの関連性を示す系統樹は、「MegAlign」ソフトウェア(DNASTAR、マディソン、米国)のバージョン10.1.0を用いて作成した。系統樹は、「ClustalW」を用いてデフォルト設定で作成した。
1ステッププロセスでのポリウレタンフォームの生成に通常用いられている加工プロセスにより、以下に挙げる出発物質を反応させた。
100部 デスモフェン(Desmophen)2200B
3部 水
19部 デスモジュール(Desmodur)T80
19部 デスモジュールT65
0.7部 N,N'-ジメチルピペラジン
1部 テゴスタブ(Tegostab)8325
デスモフェン(登録商標)2200B(コベストロドイツAG(Covestro Deutschland AG)社);水酸基価が約60mg KOH/gである、アジピン酸、ジエチレングリコール及び1,1,1-トリメチロールプロパンに基づく分枝ポリエステルポリオール
デスモジュール(登録商標)T80(コベストロドイツAG社);トリレン2,4-及び2-6-ジイソシアネートを約80:20の混合比で含む異性体混合物
デスモジュール(登録商標)T65(コベストロドイツAG社);トリレン2,4-及び2-6-ジイソシアネートを約67:33の混合比で含む異性体混合物
N,N'-ジメチルピペラジン;abcr GmbH社製の触媒
テゴスタブ(登録商標)B 8325;フォーム安定剤、エボニック(Evonik)社製
水;脱イオン水
使用した基質は、トリレンジイソシアネートを用いて生成したポリエステルポリウレタンであった。分解は2つの反応ステップで行われた。まず、フォームをリパーゼと共にインキュベートした。産生されたオリゴマーを中和した後、ウレタナーゼを用いてモノマーに切断した。
Claims (11)
- ポリエステル−ポリウレタンを低分子量の分解生成物へと分解するプロセスであって、
(a)ポリエステル−ポリウレタン中に存在するエステル基を切断するステップ;及び
(b)ウレタナーゼ活性を有するポリペプチドにより、ポリエステル−ポリウレタン中に存在するウレタン基を切断するステップ
を含み、
プロセスステップ(a)及び(b)は、順番に、又は並行して実施される、前記プロセス。 - 前記ウレタナーゼ活性を有するポリペプチドが、配列番号1〜配列番号10及び上記配列と少なくとも90 %の配列同一性を有するアミノ酸配列からなる群から選択されるアミノ酸配列を有する、請求項1に記載のプロセス。
- プロセスステップ(a)が、プロセスステップ(b)の前に実施される、請求項1又は2に記載のプロセス。
- ポリオール、ポリカルボン酸、及びポリアミンがプロセス生成物として形成される、請求項1〜3のいずれか一項に記載のプロセス。
- 4,4'-メチレンジアミン、2,4'-メチレンジアミン、2,2'-メチレンジアミン、1,4-ナフチレンジアミン(Naphthylendiamin)、1,5-ナフチレンジアミン、1,6-ナフチレンジアミン、トリレン-2,4-ジアミン、及びトリレン-2,6-ジアミンからなる群から選択される少なくとも1つのポリアミンが形成される、請求項4に記載のプロセス。
- エチレングリコール、ジエチレングリコール、1,4-ブタンジオール、トリエチレングリコール、プロピレングリコール、1,2-ジプロピレングリコール、ネオペンチルグリコール、グリセロール、1,1,1-トリメチロールプロパン、スクロース、ソルビトール、及びペンタエリトリトールからなる群から選択される少なくとも1つのポリオールが形成される、請求項4に記載のプロセス。
- コハク酸、グルタル酸、アジピン酸、フタル酸、テレフタル酸、ベンゼントリカルボン酸、オレイン酸、及びリシノール酸からなる群から選択される少なくとも1つのポリカルボン酸が形成される、請求項4に記載のプロセス。
- 前記プロセスステップ(a)が、リパーゼを用いて実施される、請求項1〜7のいずれか一項に記載のプロセス。
- 前記リパーゼが、配列番号11若しくは配列番号12のアミノ酸配列、又は配列番号11若しくは配列番号12と少なくとも90 %の配列同一性を有する上記配列のバリアントを有する、請求項8に記載のプロセス。
- 配列番号3、配列番号2、配列番号4、配列番号5、配列番号6、配列番号8、配列番号10及び前記ポリペプチドのバリアントからなる群から選択されるアミノ酸配列を有するポリペプチド、又は配列番号7に記載のアミノ酸配列を有するGatA類似ポリペプチド若しくはそのバリアントの使用であって、前記ポリペプチドが、ウレタン結合の酵素的切断のためのウレタナーゼ活性を有することを特徴とする、前記使用。
- ウレタン基が芳香族的に結合している、請求項10に記載の使用。
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JP2006055005A (ja) * | 2004-08-17 | 2006-03-02 | Japan Science & Technology Agency | 新規ウレタナーゼ遺伝子 |
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JPH09192633A (ja) | 1995-05-15 | 1997-07-29 | Rengo Co Ltd | ウレタン化合物の分解方法および該化合物を分解する菌 |
JP3735918B2 (ja) | 1996-01-24 | 2006-01-18 | スズキ株式会社 | エステラーゼ活性を有するポリウレタン分解用酵素液の調製方法 |
DE19706023A1 (de) | 1997-02-17 | 1998-08-20 | Bayer Ag | Abbau von biologisch abbaubaren Polymeren mit Enzymen |
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- 2019-11-13 KR KR1020217000851A patent/KR20210054501A/ko unknown
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006055005A (ja) * | 2004-08-17 | 2006-03-02 | Japan Science & Technology Agency | 新規ウレタナーゼ遺伝子 |
WO2007029630A1 (ja) * | 2005-09-07 | 2007-03-15 | Japan Science And Technology Agency | 新規なセラミダーゼ及びその利用 |
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US20210269834A1 (en) | 2021-09-02 |
KR20210054501A (ko) | 2021-05-13 |
EP4151727A1 (de) | 2023-03-22 |
EP3587570A1 (de) | 2020-01-01 |
CN113115588A (zh) | 2021-07-13 |
PT3587570T (pt) | 2022-11-21 |
EP3587570B1 (de) | 2022-08-31 |
WO2019243293A1 (de) | 2019-12-26 |
HUE060559T2 (hu) | 2023-03-28 |
EP3810772A1 (de) | 2021-04-28 |
CA3104429A1 (en) | 2019-12-26 |
US20220282287A1 (en) | 2022-09-08 |
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