申请人:Farmer William R.
公开号:US20100168481A1
公开(公告)日:2010-07-01
Recombinant hosts for producing polyhydroxyalkanoates and methods of producing polyhydroxyalkanoates from renewable carbon substrates are provided. Certain recombinant hosts that produce 5 carbon chemicals such as 5-aminopentanoate (5AP), 5-hydroxyvalerate (5HV), glutarate, and 1,5 pentanediol (PDO) are also provided. One embodiment provides a recombinant host expressing a gene encoding a heterologous enzyme selected from the group consisting of a polyhydroxyalkanoate synthase and a 5-hydroxyvalerate-CoA (5HV-CoA) transferase, wherein the host produces a polymer containing 5-hydroxyvalerate. Preferably, the host expresses both a polyhydroxyalkanoate synthase and a 5HV-CoA transferase. The host can be prokaryotic or eukaryotic. A preferred prokaryotic host is
E. coli
. The polymers produced by the recombinant hosts can be homopolymers or copolymers of 5-hydroxyvalerate. A preferred copolymer is poly(3-hydroxybutyrate-co-5-hydroxyvalerate).
本发明提供了用于生产聚羟基脂肪酸酯的重组宿主以及从可再生碳底物生产聚羟基脂肪酸酯的方法。本发明还提供了某些重组宿主,它们可以产生5碳化学品,例如5-氨基戊酸(5AP)、5-羟基戊酸(5HV)、戊二酸和1,5-戊二醇(PDO)。其中一种实施例提供了一种表达编码异源酶的基因的重组宿主,所述异源酶选自聚羟基脂肪酸酯合成酶和5-羟基戊酸-CoA(5HV-CoA)转移酶的群组,其中所述宿主产生含有5-羟基戊酸的聚合物。最好,宿主同时表达聚羟基脂肪酸酯合成酶和5HV-CoA转移酶。宿主可以是原核生物或真核生物。优选的原核生物宿主是大肠杆菌(E. coli)。重组宿主产生的聚合物可以是5-羟基戊酸的同源聚合物或共聚物。优选的共聚物是聚(3-羟基丁酸-5-羟基戊酸)。