JPWO2018110616A1 - 新規宿主細胞及びそれを用いた目的タンパク質の製造方法 - Google Patents
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Abstract
Description
(1)以下の(a)〜(d)のいずれかの遺伝子が不活性化された宿主細胞:
(a)配列番号34に示す塩基配列を含む遺伝子、
(b)配列番号34に示す塩基配列に対して相補的な塩基配列からなる核酸にストリンジェントな条件でハイブリダイズする核酸の塩基配列を含む遺伝子、
(c)配列番号34に示す塩基配列と85%以上の配列同一性を有する塩基配列を含む遺伝子、
(d)配列番号33に示すアミノ酸配列と85%以上の配列同一性を有するアミノ酸配列をコードする遺伝子。
(2)前記(a)〜(d)のいずれかの遺伝子と相同領域を有する塩基配列、前記(a)〜(d)のいずれかの遺伝子のプロモーターと相同領域を有する塩基配列、及び/又は前記(a)〜(d)のいずれかの遺伝子のターミネーターと相同領域を有する塩基配列を含有するベクターで形質転換して得られる(1)に記載の宿主細胞。
(3)前記ベクターが、目的タンパク質をコードする塩基配列を含有する、(2)に記載の宿主細胞。
(4)さらに、目的タンパク質をコードする塩基配列を含有するベクターを含む、(2)に記載の宿主細胞。
(5)親細胞に比してメタノール資化が低下した(1)〜(4)のいずれかに記載の宿主細胞。
(6)以下の(e)〜(h)のいずれかの塩基配列を含むベクターで形質転換することにより得られる(1)〜(5)のいずれか1項に記載の宿主細胞:
(e)配列番号30に示すアミノ酸配列をコードする塩基配列、
(f)前記(e)に示すアミノ酸配列において、1もしくは複数個アミノ酸が置換、欠失、及び/又は付加したアミノ酸配列をコードする塩基配列、
(g)前記(e)に示すアミノ酸配列と85%以上の配列同一性を有するアミノ酸配列をコードする塩基配列、又は
(h)前記(e)に示すアミノ酸配列をコードする塩基配列に対して相補的な塩基配列からなる核酸にストリンジェントな条件でハイブリダイズする核酸の塩基配列。
(7)酵母、細菌、真菌、昆虫細胞、動物細胞、又は植物細胞である、(6)に記載の宿主細胞。
(8)酵母が、メタノール資化性酵母、分裂酵母、又は出芽酵母である、(7)に記載の宿主細胞。
(9)メタノール資化性酵母がコマガタエラ属酵母又はオガタエア属酵母である、(8)に記載の宿主細胞。
(10)(3)〜(9)のいずれかに記載の細胞を培養する工程、及び培養液から目的タンパク質を回収する工程を含む、目的タンパク質の製造方法。
(11)目的タンパク質が異種タンパク質である、(10)に記載の方法。
(12)培養工程において、グルコース、グリセロール、及びメタノールからなる群から選択される一以上の炭素源を含む培養液を用いる、(10)又は(11)に記載の方法。
一態様において、本発明は、以下の(a)〜(d)のいずれかの遺伝子が不活性化された宿主細胞:
(a)配列番号34に示す塩基配列を含む遺伝子、
(b)配列番号34に示す塩基配列に対して相補的な塩基配列からなる核酸にストリンジェントな条件でハイブリダイズする核酸の塩基配列を含む遺伝子、
(c)配列番号34に示す塩基配列と85%以上の配列同一性を有する塩基配列を含む遺伝子、
(d)配列番号33に示すアミノ酸配列と85%以上の配列同一性を有するアミノ酸配列をコードする遺伝子、に関する。
(e)配列番号30に示すアミノ酸配列をコードする塩基配列、
(f)前記(e)に示すアミノ酸配列において、1もしくは複数個のアミノ酸が置換、欠失、及び/又は付加したアミノ酸配列をコードする塩基配列、
(g)前記(e)に示すアミノ酸配列と85%以上の配列同一性を有するアミノ酸配列をコードする塩基配列、又は
(h)前記(e)に示すアミノ酸配列をコードする塩基配列に対して相補的な塩基配列からなる核酸にストリンジェントな条件でハイブリダイズする核酸の塩基配列、に関する。
以下の実施例において用いた組換えDNA技術に関する詳細な操作方法等は、次の成書に記載されている:Molecular Cloning 2nd Edition(Cold Spring Harbor Laboratory Press,1989)、Current Protocolsin Molecular Biology(Greene Publishing Associates and Wiley-Interscience)。
HindIII-BamHI-BglII-XbaI-EcoRIのマルチクローニングサイトをもつ遺伝子断片(配列番号22)を全合成し、これをpUC19(タカラバイオ社製、Code No. 3219)のHindIII-EcoRIサイト間に挿入して、pUC-1を構築した。
HindIII-BamHI-SpeI-XbaI-EcoRIのマルチクローニングサイトをもつ遺伝子断片(配列番号25)を全合成し、これをpUC19(タカラバイオ社製、Code No. 3219)のHindIII-EcoRIサイト間に挿入して、pUC-2を構築した。
また、GAPプロモーター(配列番号4)の両側にBamHI認識配列を付加した核酸断片を、プライマー7(配列番号13)及び8(配列番号14)を用いたPCRにより調製し、BamHI処理後にpUC-2のBamHIサイトに挿入して、pUC-Pgapを構築した。
プロモーターで制御されたG418耐性遺伝子(配列番号20)の両側に形質転換のための相同領域を付加した遺伝子断片を、プライマー19(配列番号31)及びプライマー20(配列番号32)を用いたPCRにより調製した。
プロモーターで制御されたZeocin(商標)耐性遺伝子(配列番号19)の両側に形質転換のための相同領域を付加した遺伝子断片を、プライマー21(配列番号35)及びプライマー22(配列番号36)を用いたPCRにより調製した。
製造例2で構築した抗βガラクトシダーゼ一本鎖抗体発現ベクターpUC-PaoxscFvTaoxHIS4を用いて、以下のようにコマガタエラ・パストリスを形質転換した。
製造例4で構築した配列番号34に示す塩基配列からなる遺伝子の不活性化用ベクターを用いて、以下のように抗βガラクトシダーゼ一本鎖抗体発現酵母を形質転換した。
製造例5で構築したAOX1遺伝子、FLD1遺伝子、DAS1遺伝子の不活性化用ベクターを用いて、以下のように抗βガラクトシダーゼ一本鎖抗体発現酵母を形質転換した。
実施例1で得られた配列番号34に示す塩基配列からなる遺伝子が不活性化された抗βガラクトシダーゼ一本鎖抗体発現酵母、ポリペプチドPpMPP1を発現し且つ配列番号34に示す塩基配列からなる遺伝子が不活性化された抗βガラクトシダーゼ一本鎖抗体発現酵母を2mlのBMMY培地(1% yeast extract bacto(Becton Dickinson社製)、2% polypeptone(日本製薬社製)、0.34% yeast nitrogen base Without Amino Acid and Ammonium Sulfate(Becton Dickinson社製)、1% Ammonium Sulfate、0.4mg/l Biotin、100mM リン酸カリウム(pH6.0)、2% Methanol)に接種し、これを30℃、170rpm、72時間振盪培養後、遠心分離(12000rpm、5分、4℃)により培養上清を回収した。菌体濃度はOD600にて測定した。
比較例1で得られた抗βガラクトシダーゼ一本鎖抗体発現酵母、比較例2で得られたAOX1遺伝子が不活性化された抗βガラクトシダーゼ一本鎖抗体発現酵母、FLD1遺伝子が不活性化された抗βガラクトシダーゼ一本鎖抗体発現酵母、DAS1遺伝子及びDAS2遺伝子が不活性化された抗βガラクトシダーゼ一本鎖抗体発現酵母を上記実施例2と同様の方法で培養後、遠心分離(12000rpm、5分、4℃)により培養上清を回収した。菌体濃度はOD600にて測定した。
実施例2で得られた培養上清への抗βガラクトシダーゼ一本鎖抗体生産量は、サンドイッチELISA(Enzyme-Linked Immunosorbent Assay)法により以下に示す方法で行った。
比較例3で得られた培養上清への抗βガラクトシダーゼ一本鎖抗体生産量について、実施例3と同様の方法で測定した。この方法により得られた抗βガラクトシダーゼ一本鎖抗体生産量と各々の菌体濃度(OD600)を表1に示した。
<結果>
Claims (12)
- 以下の(a)〜(d)のいずれかの遺伝子が不活性化された宿主細胞:
(a)配列番号34に示す塩基配列を含む遺伝子、
(b)配列番号34に示す塩基配列に対して相補的な塩基配列からなる核酸にストリンジェントな条件でハイブリダイズする核酸の塩基配列を含む遺伝子、
(c)配列番号34に示す塩基配列と85%以上の配列同一性を有する塩基配列を含む遺伝子、
(d)配列番号33に示すアミノ酸配列と85%以上の配列同一性を有するアミノ酸配列をコードする遺伝子。 - 前記(a)〜(d)のいずれかの遺伝子と相同領域を有する塩基配列、前記(a)〜(d)のいずれかの遺伝子のプロモーターと相同領域を有する塩基配列、及び/又は前記(a)〜(d)のいずれかの遺伝子のターミネーターと相同領域を有する塩基配列を含有するベクターで形質転換して得られる請求項1に記載の宿主細胞。
- 前記ベクターが、目的タンパク質をコードする塩基配列を含有する、請求項2に記載の宿主細胞。
- さらに、目的タンパク質をコードする塩基配列を含有するベクターを含む、請求項2に記載の宿主細胞。
- 親細胞に比してメタノール資化が低下した請求項1〜4のいずれかに記載の宿主細胞。
- 以下の(e)〜(h)のいずれかの塩基配列を含むベクターで形質転換することにより得られる請求項1〜5のいずれか1項に記載の宿主細胞:
(e)配列番号30に示すアミノ酸配列をコードする塩基配列、
(f)前記(e)に示すアミノ酸配列において、1もしくは複数個のアミノ酸が置換、欠失、及び/又は付加したアミノ酸配列をコードする塩基配列、
(g)前記(e)に示すアミノ酸配列と85%以上の配列同一性を有するアミノ酸配列をコードする塩基配列、又は
(h)前記(e)に示すアミノ酸配列をコードする塩基配列に対して相補的な塩基配列にストリンジェントな条件でハイブリダイズする核酸の塩基配列。 - 酵母、細菌、真菌、昆虫細胞、動物細胞、又は植物細胞である、請求項6に記載の宿主細胞。
- 酵母が、メタノール資化性酵母、分裂酵母、又は出芽酵母である、請求項7に記載の宿主細胞。
- メタノール資化性酵母がコマガタエラ属酵母又はオガタエア属酵母である、請求項8に記載の宿主細胞。
- 請求項3〜9のいずれかに記載の細胞を培養する工程、及び培養液から目的タンパク質を回収する工程を含む、目的タンパク質の製造方法。
- 目的タンパク質が異種タンパク質である、請求項10に記載の方法。
- 培養工程において、グルコース、グリセロール、及びメタノールからなる群から選択される一以上の炭素源を含む培養液を用いる、請求項10又は請求項11に記載の方法。
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