Production method of polyester containing epoxy group in side chain and production method of crosslinked polymer
申请人:CANON KABUSHIKI KAISHA
公开号:EP1188836A2
公开(公告)日:2002-03-20
A method is provided which biosynthesizes a PHA having an epoxy group in a side chain terminal with improved physicochemical properties. Specifically, a method of producing a polyester containing an epoxy group in a side chain thereof using 1-alkene as a raw material is provided which comprises the steps of bringing 1-alkene into contact with a microorganism having an ability to uptake 1-alkene and convert it to a polyester and allowing the microorganism to convert the 1-alkene into a polyester containing an epoxy group in a side chain thereof. Further, a method of producing a crosslinked polymer is provided which comprises reacting the polyester obtained by the above mentioned method with a diamine compound.
METHOD FOR PREPARING POLYLACTATE AND COPOLYMER THEREOF USING A MUTANT MICROORGANISM WITH ENHANCED POLYLACTATE, AND THE COPOLYMER PRODUCING CAPABILITY THEREOF
申请人:LG Chem, Ltd.
公开号:EP2314638A2
公开(公告)日:2011-04-27
Provided is a method of preparing polylactate (PLA) or a copolymer thereof using a mutant microorganism in which a gene participating in a coenzyme A (CoA) donor- and lactate-producing pathway is genetically manipulated to increase the productivity of a CoA donor and lactate. Amounts of the CoA donor and the lactate are simultaneously increased in a microbial metabolic pathway to enable effective biosynthesis of PLA and a hydroxyalkanoate-lactate copolymer having a high content of lactate, which is industrially useful.
PREPARATION METHOD OF LACTATE POLYMERS AND LACTATE COPOLYMERS USING POLYHYDROXYALKANOATE SYNTHASE MUTANTS
申请人:LG Chem, Ltd.
公开号:EP2471910A2
公开(公告)日:2012-07-04
Mutants of various polyhydroxyalkanoate (PHA) synthases capable of synthesizing a lactate polymer (PLA) and a lactate copolymer (PLA copolymer), and a method of preparing a lactate polymer and a lactate copolymer using the same are provided. More specifically, a mutant of polyhydroxyalkanoate synthase set forth in SEQ ID NO: 2, 4, 6, or 8, and a method of preparing lactate polymer and lactate copolymer using the mutant of synthase are provided. The polyhydroxyalkanoate synthase set forth in SEQ ID NO: 2, 4, 6, or 8 can have an activity of synthesizing a lactate polymer and a lactate copolymer by an amino acid sequence mutation affecting an activity of synthesizing a lactate polymer, and can produce a lactate polymer and a copolymer that have different features, respectively, by using the mutants of the synthase.
本发明提供了能够合成乳酸聚合物(聚乳酸)和乳酸共聚物(聚乳酸共聚物)的各种聚羟基烷酸(PHA)合酶的突变体,以及使用这些突变体制备乳酸聚合物和乳酸共聚物的方法。更具体地说,提供了 SEQ ID NO:2、4、6 或 8 所述的聚羟基烷酸合酶突变体,以及使用该合酶突变体制备乳酸聚合物和乳酸共聚物的方法。SEQ ID NO:2、4、6 或 8 所述的聚羟基烷酸合酶可通过影响合成乳酸聚合物活性的氨基酸序列突变而具有合成乳酸聚合物和乳酸共聚物的活性,并可通过使用该合酶的突变体生产分别具有不同特征的乳酸聚合物和共聚物。
Mutant of propionyl-CoA transferase from Clostridium propionicum and preparing method for PLA or PLA copolymer using the same
申请人:LG Chem, Ltd.
公开号:EP2636744A1
公开(公告)日:2013-09-11
Provided is a mutant of propionyl-CoA transferase from Clostridium propionicum that can convert lactate into lactyl-CoA with high efficiency in a method of preparing a polylactate (PLA) or PLA copolymer using microorganisms. Unlike conventional propionyl-CoA transferase which is weakly expressed in E.coli, when a mutant of propiony-CoA transferase from Clostridium propionicum is introduced into recombinant E.coli, lactyl-CoA can be supplied very smoothly, thereby enabling highly efficient preparation of polylactate (PLA) and PLA copolymer.
Preparation method of lactate polymers and lactate copolymers using polyhydroxyalkanoate synthase mutants
申请人:LG Chem, Ltd.
公开号:EP2650372A2
公开(公告)日:2013-10-16
Mutants of various polyhydroxyalkanoate (PHA) synthases capable of synthesizing a lactate polymer (PLA) and a lactate copolymer (PLA copolymer), and a method of preparing a lactate polymer and a lactate copolymer using the same are provided. More specifically, a mutant of polyhydroxyalkanoate synthase set forth in SEQ ID NO: 2, 4, 6, or 8, and a method of preparing lactate polymer and lactate copolymer using the mutant of synthase are provided. The polyhydroxyalkanoate synthase set forth in SEQ ID NO: 2, 4, 6, or 8 can have an activity of synthesizing a lactate polymer and a lactate copolymer by an amino acid sequence mutation affecting an activity of synthesizing a lactate polymer, and can produce a lactate polymer and a copolymer that have different features, respectively, by using the mutants of the synthase.
本发明提供了能够合成乳酸聚合物(聚乳酸)和乳酸共聚物(聚乳酸共聚物)的各种聚羟基烷酸(PHA)合酶的突变体,以及使用这些突变体制备乳酸聚合物和乳酸共聚物的方法。更具体地说,提供了 SEQ ID NO:2、4、6 或 8 所述的聚羟基烷酸合酶突变体,以及使用该合酶突变体制备乳酸聚合物和乳酸共聚物的方法。SEQ ID NO:2、4、6 或 8 所述的聚羟基烷酸合酶可通过影响合成乳酸聚合物活性的氨基酸序列突变而具有合成乳酸聚合物和乳酸共聚物的活性,并可通过使用该合酶的突变体生产分别具有不同特征的乳酸聚合物和共聚物。