發明
美國
13/482,422
US 8,859,246 B2
一種使大腸桿菌大量表現丙酸基因與合成聚羥基丁酯-羥基戊酯Method to Produce PHBV by Recombinant Escherichia Coli
元智大學
2014/10/14
本發明揭露使用單一質體,同時攜帶phaCAB基因與prpE基因,在大腸桿菌中表達,生產聚羥基丁酯-羥基戊酯之方法。經由調整培養基中丙酸之濃度,可以得到不同比例之羥基戊酯之高分子聚合物。文獻上曾經使用大腸桿菌生產PHBV,然而需要同時以兩種質體分別攜帶phaCAB基因來產生合成PHB所需要的酵素蛋白以及與丙酸代謝之相關基因prpE。然而利用兩種不同質體建構之重組菌株,在實際生產時會面臨到培養基中須同時添加兩種抗生素,以及無法實際掌控兩種質體存在菌株體內之數目與比例。本發明將重組大腸桿菌所需之所有基因構築於單一質體,包括phaCAB,vgb與prpE等基因。實驗證實了攜帶此一質體的大腸桿菌菌株確實會產生PHBV產物。藉由調控培養基的組成以及所含丙酸之濃度,我們可以利用此菌株生產數種含不同比例之羥基戊酯(約5% - 35%不等)之聚羥基丁酯-羥基戊酯聚合物。 The invention discloses a method for production of polyhydroxybutyrate-co-polyhydroxyvalerate (PHBV) by recombinant Escherichia coli. PHBV can be obtained from the recombinant E. coli cultivated in the medium containing propionic acid. The production of PHBV by recombinant E. coli has been noted before; however all of these strains need to harbor two plasmids to carry phaCAB and prpE, respectively. The culture medium therefore needs to be supplemented with two different kinds of antibiotics. In this patent, we provide a method that integrated genes (i.e. phaCAB, vgb and prpE) required for PHBV production into a single plasmid. The plasmids were then transformed into an E. coli host. Results showed that PHBV can be produced by this recombinant E. coli, and the ration of HV to HB in the co-polymers can be regulated by addition of different concentrations of propionic acid in the medium. The percentage of HV in the co-polymers can be adjusted from about 3% up to more than 35%.
本部(發文號1080011801)同意該校108年2月18日元智研字第1080000159號函申請終止維護專利。
產學合作組
(03)4638800#2286
版權所有 © 國家科學及技術委員會 National Science and Technology Council All Rights Reserved.
建議使用IE 11或以上版本瀏覽器,最佳瀏覽解析度為1024x768以上|政府網站資料開放宣告
主辦單位:國家科學及技術委員會 執行單位:台灣經濟研究院 網站維護:台灣經濟研究院