摘要:
A method including the steps a) providing a primary alcohol of the formula HO—(CH2)x—R1, where R1 is —OH, —SH, —NH2 or —COOR2; x is at least 3; and R2 is H, alkyl or aryl, b) oxidizing the primary alcohol by contacting it with an NAD(P)+-dependent alcohol dehydrogenase, and c) contacting the oxidation product of step a) with a transaminase, where the NAD(P)+-alcohol dehydrogenase and/or the transaminase is a recombinant or isolated enzyme. A whole cell catalyst for carrying out the method. The use of such a whole cell catalyst for oxidizing a primary alcohol.
摘要:
The invention describes a process for preparing acetone starting from acetyl-coenzyme A comprising process steps A. enzymatic conversion of acetyl-CoA into acetoacetyl-CoA B. enzymatic conversion of acetoacetyl-CoA into acetoacetate and CoA and C. decarboxylation of acetoacetate to acetone and CO2, which is characterized in that the coenzyme A is not transferred in process step B to an acceptor molecule. In addition, process step B is surprisingly catalyzed by enzymes of the classes of acyl-CoA thioesterase, acyl-CoA synthetase or acyl-CoA thiokinase.A completely novel metabolic pathway is concerned, because the enzymatic hydrolysis of acetoacetyl-CoA without simultaneous transfer of CoA to a receptor molecule has never previously been described for any microbial enzyme.
摘要翻译:本发明描述了从乙酰辅酶A开始制备丙酮的方法,包括方法步骤A.将乙酰辅酶A酶促转化为乙酰乙酰辅酶A.将乙酰乙酰辅酶A酶促转化为乙酰乙酸酯,并将乙酰乙酸酯脱羧至丙酮, CO 2,其特征在于辅酶A在工艺步骤B中不转移到受体分子。 此外,方法步骤B令人惊奇地由酰基-CoA硫酯酶,酰基辅酶A合成酶或酰基辅酶A硫代激酶类的酶催化。 关注一个完全新颖的代谢途径,因为乙酰乙酰辅酶A的酶水解而不会同时转移CoA到受体分子,从未以前没有描述任何微生物酶。
摘要:
The present invention relates to a method comprising the steps a) providing a secondary alcohol, b) oxidizing the secondary alcohol by contacting it with an NAD(P)+-dependent alcohol dehydrogenase and c) contacting the oxidation product of step a) with a transaminase, wherein the NAD(P)+-dependent alcohol dehydrogenase and/or the transaminase is a recombinant or isolated enzyme, to a whole cell catalyst for carrying out the method, and to the use of such a whole cell catalyst for oxidizing a secondary alcohol.
摘要:
The present invention relates to a method comprising the steps a) providing a primary alcohol of the formula HO—(CH2)x—R1, wherein R1 is selected from the group consisting of —OH, —SH, —NH2 and —COOR2, x is at least 3 and R2 is selected from the group consisting of H, alkyl and aryl, b) oxidizing the primary alcohol by contacting it with an NAD(P)+-dependent alcohol dehydrogenase, and c) contacting the oxidation product of step a) with a transaminase, wherein the NAD(P)+-alcohol dehydrogenase and/or the transaminase is a recombinant or isolated enzyme, to a whole cell catalyst for carrying out the method, and to the use of such a whole cell catalyst for oxidizing a primary alcohol.
摘要:
The invention relates to genetically modified Pichia ciferrii cells, to the use thereof and to a method of producing sphingoid bases and sphingolipids.
摘要:
A microbial cell is used for producing at least one fatty acid ester, wherein the cell is genetically modified to contain (i) at least one first genetic mutation that enables the cell to produce at least one fatty acid and/or acyl coenzyme A (CoA) thereof by increased enzymatic activity in the cell relative to the wild type cell of malonyl-CoA dependent and malonyl-ACP independent fatty acyl-CoA metabolic pathway, wherein the fatty acid contains at least 5 carbon atoms; and (ii) a second genetic mutation that increases the activity of at least one wax ester synthase in the cell relative to the wild type cell and the wax ester synthase has sequence identity of at least 50% to a polypeptide of SEQ ID NO: 1-8 and combinations thereof or to a functional fragment of any of the polypeptides for catalyzing the conversion of fatty acid and/or acyl coenzyme A thereof to the fatty acid ester.
摘要翻译:微生物细胞用于生产至少一种脂肪酸酯,其中所述细胞被遗传修饰以包含(i)至少一种能使细胞产生至少一种脂肪酸和/或酰基辅酶A(CoA)的第一遗传突变 ),其相对于丙二酰辅酶A依赖性和丙二酰-ACP无关脂肪酰基辅酶A代谢途径的野生型细胞增加细胞中的酶活性,其中所述脂肪酸含有至少5个碳原子; 和(ii)增加细胞中至少一种蜡酯合酶相对于野生型细胞的活性的第二种遗传突变,并且蜡酯合成酶与SEQ ID NO:1的多肽具有至少50%的序列同一性 -8及其组合或任何多肽的功能片段,用于催化脂肪酸和/或其酰基辅酶A转化为脂肪酸酯。
摘要:
The invention relates to a method comprising the steps a) providing isobutyric acid, b) bringing isobutyric acid into contact with the combination of isobutyrate kinase and phosphotransisobutyrylase and/or isobutyryl-coenzyme A synthetase/ligase and/or isobutyrate-coenzyme A transferase, c) bringing the product from step a) into contact with isobutyryl-coenzyme A dehydrogenase, d) bringing the product from step b) into contact with methacrylyl-coenzyme A hydratase, and e) hydrolyzing the product from step d) to form 3-hydroxyisobutyric acid, where at least one of the enzymes is used in the form of a cell which, compared to its wildtype, comprises a reduced activity of a 3-hydroxyisobutyric acid dehydrogenase or a variant thereof, a cell which has at least one enzyme from the group comprising isobutyryl-coenzyme A synthetase/ligase, isobutyrate-coenzyme A transferase, isobutyrate kinase, phosphotransisobutyrylase, isobutyryl-coenzyme A dehydrogenase, methacrylyl-coenzyme A hydratase and 3-hydroxyisobutyryl-coenzyme A hydrolase and, compared to its wildtype, a reduced activity of a 3-hydroxyisobutyric acid dehydrogenase or a variant thereof, wherein the cell preferably has, in addition, a monooxygenase, more preferably a monooxygenase of the alkBGT type or a variant thereof and the use of such a cell for preparing 3-hydroxyisobutyric acid.
摘要:
The invention relates to genetically engineered Candida tropicalis cells, use thereof and a method of production of ω-hydroxycarboxylic acids and ω-hydroxycarboxylic acid esters.