Mutants of PHA synthase from Pseudomonas sp.6-19 and method for preparing lactate homopolymer or copolymer using the same슈도모나스 속 619 유래의 PHA 합성효소 변이체 및상기 PHA 합성효소 변이체를 이용한 락테이트 중합체 및락테이트 공중합체의 제조방법
The present invention relates to polyhydroxyalkanoate synthase (PHA synthase) mutant originated from Pseudomonas sp. 6-19 (KCTC 11027BP) which can prepare lactate polymer and/or copolymer by using lactyl-CoA as a substrate. The present invention relates to a method for preparing lactate polymer and/or copolymer with the synthase mutant. The polyhydroxyalkanoate synthase mutants of the present invention originated from Pseudomonas sp. 6-19 can efficiently prepare lactate polymer and/or copolymer by using as a substrate lactyl-CoA which is difficult to be used as a substrate by conventional polyhydroxyalkanoate synthase.