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1.发明申请公开(公告)号：US20200010863A1
公开(公告)日：2020-01-09
申请号：US16503301
申请日：2019-07-03
发明人： Wenbo LIU , Min XU , Chen YANG , Howard CHOU , Xiucai LIU
摘要： The invention relates to a long-chain dibasic acid with low content of monobasic acid impurity and a production method thereof, in particular to the preparation of a long-chain dibasic acid producing strain by means of directed evolution and homologous recombination, and to the production of a long-chain dibasic acid with low content of monobasic acid impurity by fermentation of said strain. The invention relates to a mutated CYP52A12 gene, homologous gene or variant thereof, which, relative to GenBank Accession Number AY230498 and taking the first base upstream of the start codon ATG as −1, comprises a mutation. The invention relates to a strain comprising said mutated CYP52A12 gene, homologous gene or variant thereof wherein when the strain is fermented to produce a long-chain dibasic acid, the content of monobasic acid impurity in the fermentation product is significantly reduced.
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公开(公告)号：US20200010859A1
公开(公告)日：2020-01-09
申请号：US16503309
申请日：2019-07-03
发明人： Wenbo LIU , Min XU , Chen YANG , Howard CHOU , Xiucai LIU
摘要： The present invention relates to a long-chain dibasic acid with low content of long-chain dibasic acid impurity of shorter carbon chain, to the preparation of a long-chain dibasic acid producing strain by directed evolution of POX gene and homologous recombination, and to the production of a long-chain dibasic acid with low content of long-chain dibasic acid impurity of shorter carbon chain by using the strain. The present invention also relates to a strain containing a mutated promoter, wherein, when a long-chain dibasic acid is produced by fermentation of this strain, the content of the acid impurity of shorter carbon chain in the fermentation product is significantly reduced.
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3.发明申请公开(公告)号：US20200010855A1
公开(公告)日：2020-01-09
申请号：US16503304
申请日：2019-07-03
发明人： Wenbo LIU , Min XU , Chen YANG , Howard CHOU , Xiucai LIU
摘要： The present invention relates to a long-chain dibasic acid with low content of hydroxyl acid impurity and a production method thereof, in particular to a method for producing a long-chain dibasic acid with low content of hydroxyl acid impurity by fermenting a long-chain dibasic acid producing strain prepared by homologous recombination method. The present invention relates to a recombinant long-chain dibasic acid producing microorganism, having increased alcohol dehydrogenase activity and optionally decreased acetyl-CoA oxidase activity. The present invention also relates to a method of producing a long-chain dibasic acid by the recombinant long-chain dibasic acid producing microorganism and use thereof.
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公开(公告)号：US20220380816A1
公开(公告)日：2022-12-01
申请号：US17814972
申请日：2022-07-26
发明人： Wenbo LIU , Min XU , Chen YANG , Howard CHOU , Xiucai LIU
摘要： The present invention relates to a long-chain dibasic acid with low content of long-chain dibasic acid impurity of shorter carbon chain, to the preparation of a long-chain dibasic acid producing strain by directed evolution of POX gene and homologous recombination, and to the production of a long-chain dibasic acid with low content of long-chain dibasic acid impurity of shorter carbon chain by using the strain. The present invention also relates to a strain containing a mutated promoter, wherein, when a long-chain dibasic acid is produced by fermentation of this strain, the content of the acid impurity of shorter carbon chain in the fermentation product is significantly reduced.
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5.发明申请公开(公告)号：US20200010862A1
公开(公告)日：2020-01-09
申请号：US16503268
申请日：2019-07-03
发明人： Wenbo LIU , Min XU , Chen YANG , Howard CHOU , Xiucai LIU
摘要： The invention relates to a long-chain dibasic acid with low content of fatty acid impurity and a method of producing it, in particular to the preparation of a long-chain dibasic acid producing strain by using directed evolution and homologous recombination, and to the fermentation production of a long-chain dibasic acid with low content of fatty acid impurity by using said strain. The invention relates to an isolated mutated CPR-b gene, homologous gene or variant thereof, relative to the GenBank Accession Number AY823228, taking the first base upstream of the start codon ATG as −1, comprising a base mutation −322G>A, and taking the first base downstream of the stop codon TAG as 1, comprising mutations 3TUTR.19C>T and 3′UTR.76_77insT. The invention also relates to a strain containing said mutated CPR-b gene, homologous gene or variant thereof, wherein, when the strain is used to produce a long-chain dibasic acid by fermentation, the content of fatty acid impurity in the fermentation product is significantly decreased.
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公开(公告)号：US20240254522A1
公开(公告)日：2024-08-01
申请号：US18638860
申请日：2024-04-18
发明人： Wenbo LIU , Min XU , Chen YANG , Xiucai LIU
CPC分类号： C12P7/44 , C12N15/52 , C12Y103/03006
摘要： The present invention relates to a long-chain dibasic acid with low content of long-chain dibasic acid impurity of shorter carbon chain, to the preparation of a long-chain dibasic acid producing strain by directed evolution of POX gene and homologous recombination, and to the production of a long-chain dibasic acid with low content of long-chain dibasic acid impurity of shorter carbon chain by using the strain. The present invention also relates to a strain containing a mutated promoter, wherein, when a long-chain dibasic acid is produced by fermentation of this strain, the content of the acid impurity of shorter carbon chain in the fermentation product is significantly reduced.
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7.发明申请公开(公告)号：US20200239919A1
公开(公告)日：2020-07-30
申请号：US16826606
申请日：2020-03-23
发明人： Wenbo LIU , Min XU , Chen YANG , Howard CHOU , Xiucai LIU
摘要： The invention relates to a long-chain dibasic acid with low content of monobasic acid impurity and a production method thereof, in particular to the preparation of a long-chain dibasic acid producing strain by means of directed evolution and homologous recombination, and to the production of a long-chain dibasic acid with low content of monobasic acid impurity by fermentation of said strain. The invention relates to a mutated CYP52A12 gene, homologous gene or variant thereof, which, relative to GenBank Accession Number AY230498 and taking the first base upstream of the start codon ATG as −1, comprises a mutation. The invention relates to a strain comprising said mutated CYP52A12 gene, homologous gene or variant thereof wherein when the strain is fermented to produce a long-chain dibasic acid, the content of monobasic acid impurity in the fermentation product is significantly reduced.
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