Methods and systems for producing prescribed unit size azido-poly(3-hydroxyalkanoate) (azido-PHA) polymers and copolymers are provided. The methods and systems can employ recombinant bacteria that are not native producers of PHA or lack enzymes to degrade PHA once synthesized, metabolize short to long chain fatty acids without induction, and express an (R)-specific enoyl-CoA hydratase and a PHA synthase, the (R)-specific enoyl-CoA hydratase and PHA synthase having wide substrate specificities. The recombinant bacteria are fed at least one ω-azidofatty acid substrate that is equal in carbon length to the prescribed or desired unit size of an azido-PHA polymer to be produced. Azido-PHA polymers or azido-PHA co-polymers can be conjugated via copper-catalyzed alkyne-azide cycloaddition (CuAAC) or strain-promoted azide-alkyne cycloaddition (SPAAC) reactions. The prescribed unit size conjugated azido-PHA polymer or orthogonally conjugated azido-PHA co-polymer that is produced is then isolated and/or purified.
提供了生产规定单元大小的偶氮基聚(3-羟基
脂肪酸酯) (azido-PHA)聚合物和共聚物的方法和系统。该方法和系统可以使用
重组细菌,这些细菌不是PHA的天然产生者,或者缺乏合成PHA后降解PHA的酶,可以代谢短至长链
脂肪酸而无需诱导,并表达(R)-特异性烯酰
辅酶A水合酶和PHA合酶,其中(R)-特异性烯酰
辅酶A水合酶和PHA合酶具有广泛的底物特异性。
重组细菌至少被喂养一种ω-偶氮基
脂肪酸底物,该底物的碳长度等于要生产的azido-PHA聚合物的规定或期望单元大小。通过
铜催化的炔-偶氮基环加成(Cu
AAC)或应变促进的偶氮基-炔基环加成(
SPAAC)反应,可以将偶氮基-PHA聚合物或偶氮基-PHA共聚物共轭。然后分离和/或纯化所生产的规定单元大小共轭偶氮基-PHA聚合物或正交共轭偶氮基-PHA共聚物。