公开(公告)号：US20180305722A1

公开(公告)日：2018-10-25

申请号：US15763323

申请日：2016-09-15

Applicant: KANEKA CORPORATION

Inventor： Shingo KOBAYASHI ,  Hitoshi SASHIWA ,  Tetsuya FUJIKI

IPC: C12P7/62 ,  C08G63/06 ,  C12N15/74 ,  C12N1/20

CPC classification number: C12P7/625 ,  C08G63/06 ,  C12N1/20 ,  C12N15/09 ,  C12N15/74 ,  C12P7/62

Abstract: An object of the invention is to improve the crystallization speed of a PHA copolymer which is to be slowly crystallized, and improve the melt workability and productivity. A microorganism is used which has genes encoding two or more different PHA synthases derived from the genus Aeromonas. The genes encoding the PHA synthases derived from the genus Aeromonas preferably include genes encoding at least two PHA synthases which are capable of synthesizing a copolymer PHA including, as monomer unit species, 3-hydroxybutyric acid and 3-hydroxyhexanoic acid, and which are different in substrate specificity toward 3-hydroxyhexanoic acid from each other. When this microorganism is cultured, a PHA mixture can be produced which includes three or more PHA species different in melting point from each other.