JPWO2015115520A1 - 藍藻においてプラスチック原料を生産する方法 - Google Patents
藍藻においてプラスチック原料を生産する方法 Download PDFInfo
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- UNFWWIHTNXNPBV-WXKVUWSESA-N spectinomycin Chemical compound O([C@@H]1[C@@H](NC)[C@@H](O)[C@H]([C@@H]([C@H]1O1)O)NC)[C@]2(O)[C@H]1O[C@H](C)CC2=O UNFWWIHTNXNPBV-WXKVUWSESA-N 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
- 235000011044 succinic acid Nutrition 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
Description
(1)時計タンパク質遺伝子が過剰発現している藍藻。
(2)時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子である、(1)記載の藍藻。
(3)藍藻が、ポリヒドロキシアルカン酸生産能を有する、(1)または(2)記載の藍藻。
(4)藍藻が、phaAB遺伝子とphaEC遺伝子を有する、(1)〜(3)のいずれかに記載の藍藻。
(5)藍藻が、Synechocystis属に属する、(1)〜(4)のいずれかに記載の藍藻。
(6)有機酸の生産方法であって、時計タンパク質遺伝子が過剰発現している藍藻を培養すること、および有機酸を採取することを含む、前記方法。
(7)有機酸がポリヒドロキシアルカン酸であり、藍藻がポリヒドロキシアルカン酸生産能を有し、時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子である、(6)記載の方法。
(8)藍藻が、phaAB遺伝子とphaEC遺伝子を有する、(7)記載の方法。
(9)ポリヒドロキシアルカン酸が、ポリヒドロキシブタン酸である、(7)または(8)記載の方法。
(10)有機酸がコハク酸または乳酸であり、時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子である、(6)記載の方法。
(11)藍藻が、Synechocystis属に属する、(6)〜(10)のいずれかに記載の方法。
(12)培養を窒素欠乏条件で行う、(6)〜(11)のいずれかに記載の方法。
(13)藍藻において有機酸生産能を増強する方法であって、藍藻において時計タンパク質遺伝子を過剰発現させることを含む、前記方法。
(14)有機酸がポリヒドロキシアルカン酸であり、時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子であり、藍藻がphaAB遺伝子とphaEC遺伝子を有する、(13)記載の方法。
(15)ポリヒドロキシアルカン酸が、ポリヒドロキシブタン酸である、(14)記載の方法。
(16)有機酸がポリヒドロキシアルカン酸であり、時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子である、(13)記載の方法。
(17)藍藻が、Synechocystis属に属する、(13)〜(16)のいずれかに記載の方法。
(18)培養を窒素欠乏条件で行う、(13)〜(17)のいずれかに記載の方法。
単細胞性シアノバクテリア(単細胞性藍藻)、Synechocystis sp.PCC 6803(以下Synechocystis)細胞を用いて、7つの時計タンパク質遺伝子(kaiA、kaiB1、kaiB2、kaiB3、kaiC1、kaiC2、kaiC3)を過剰発現する株を構築した。Synechocystis sp.PCC 6803は、パスツール研究所(フランス)から入手可能である(http://www.pasteur.fr/ip/easysite/pasteur/en/research/collections/crbip/general-informations-concerning-the-collections/iv-the-open-collections/iv-iii-pasteur-culture-collection-of-cyanobacteria)。
実施例1で作製した各時計タンパク質過剰発現株(kaiAox、kaiB1ox、kaiB2ox、kaiB3ox、kaiC1ox、kaiC2ox、kaiC3ox)および野生株(GT)について、ポリヒドロキシブタン酸(PHB)の細胞内蓄積量を測定した。
実施例1で作製した各時計タンパク質過剰発現株(kaiAox、kaiB1ox、kaiB2ox、kaiB3ox、kaiC1ox、kaiC2ox、kaiC3ox)および野生株(GT)について、コハク酸、乳酸および酢酸の生産量を測定した。
野生株のコハク酸、乳酸、酢酸の生産量はそれぞれ培養液1Lあたり約20mg、275mg、16mgであった。コハク酸については、kaiB3またはkaiC3の過剰発現によって、培養液1Lあたりの生産量が、それぞれ25mg、30mgに増加することが分かった。乳酸については、kaiB1、kaiB2、またはkaiC1の過剰発現で、それぞれ546mg、447mg、408mgに増加した。また、酢酸は、培養液1Lあたりの生産量が、kaiB3の過剰発現でそれぞれ、21mgに増加した。
野生株のコハク酸、乳酸、酢酸の生産量はそれぞれ培養液1Lあたり約13mg、5mg以下、167mgであった。コハク酸については、kaiB3またはkaiC3の過剰発現によって、培養液1Lあたりの生産量が、それぞれ19mg、26mgに増加することが分かった。乳酸については、kaiB1、kaiB2、またはkaiC1の過剰発現で、それぞれ16mg、10mg、12mgに増加した。また、酢酸は、培養液1Lあたりの生産量が、kaiB3、kaiC3の過剰発現でそれぞれ、266mg、279mgに増加した。
Claims (18)
- 時計タンパク質遺伝子が過剰発現している藍藻。
- 時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子である、請求項1記載の藍藻。
- 藍藻が、ポリヒドロキシアルカン酸生産能を有する、請求項1または2記載の藍藻。
- 藍藻が、phaAB遺伝子とphaEC遺伝子を有する、請求項1〜3のいずれかに記載の藍藻。
- 藍藻が、Synechocystis属に属する、請求項1〜4のいずれかに記載の藍藻。
- 有機酸の生産方法であって、時計タンパク質遺伝子が過剰発現している藍藻を培養すること、および有機酸を採取することを含む、前記方法。
- 有機酸がポリヒドロキシアルカン酸であり、藍藻がポリヒドロキシアルカン酸生産能を有し、時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子である、請求項6記載の方法。
- 藍藻が、phaAB遺伝子とphaEC遺伝子を有する、請求項7記載の方法。
- ポリヒドロキシアルカン酸が、ポリヒドロキシブタン酸である、請求項7または8記載の方法。
- 有機酸がコハク酸または乳酸であり、時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子である、請求項6記載の方法。
- 藍藻が、Synechocystis属に属する、請求項6〜10のいずれかに記載の方法。
- 培養を窒素欠乏条件で行う、請求項6〜11のいずれかに記載の方法。
- 藍藻において有機酸生産能を増強する方法であって、藍藻において時計タンパク質遺伝子を過剰発現させることを含む、前記方法。
- 有機酸がポリヒドロキシアルカン酸であり、時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子であり、藍藻がphaAB遺伝子とphaEC遺伝子を有する、請求項13記載の方法。
- ポリヒドロキシアルカン酸が、ポリヒドロキシブタン酸である、請求項14記載の方法。
- 有機酸がポリヒドロキシアルカン酸であり、時計タンパク質遺伝子がkaiB遺伝子またはkaiC遺伝子である、請求項13記載の方法。
- 藍藻が、Synechocystis属に属する、請求項13〜16のいずれかに記載の方法。
- 培養を窒素欠乏条件で行う、請求項13〜17のいずれかに記載の方法。
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NIPPON NOGEIKAGAKU KAISHI, vol. Vol. 72, No. 4, JPN6017016017, 1998, pages pp. 528-531 * |
PNAS, vol. Vol. 101, No. 3, JPN6017016016, 2004, pages pp. 881-885 * |
WANG, J., ET AL.: "RNA-seq based identification and mutant validation of gene targets related to ethanol resistance in", BIOTECHNOLOGY FOR BIOFUELS, vol. 5:89, JPN6015014616, 2012 * |
小山内 崇ら: "シグマ因子SigE 過剰発現によるシアノバクテリアバイオプラスチックの増産", 第64回日本生物工学会大会(創立90周年記念大会)トピックス集, JPN6015014613, 2 November 2012 (2012-11-02), pages 16 - 17 * |
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