摘要:
A process for preparing optically active alkanols of the formula I in which n is an integer from 0 to 5; Cyc is an optionally substituted, mono- or polynuclear, saturated or unsaturated, carbocyclic or heterocyclic ring, and R1 is halogen, SH, OH, NO2, NR2R3 or NR2R3R4+X−, with R2, R3 and R4 independently of one another being hydrogen or a lower alkyl or lower alkoxy radical and X− being a counterion, which process comprises incubating in a medium comprising alkanone of the formula II in which n, Cyc and R1 are as defined above, an enzyme having a polypeptide sequence (i) SEQ ID NO: 1 or (ii) in which, compared to SEQ ID NO:1, up to 25% of the amino acid radicals have been altered by deletion, insertion, substitution or a combination thereof and which retains at least 50% of the enzymic activity of SEQ ID NO:1, with the compound of the formula II being enzymically reduced to give the compound of the formula I, and isolating the product formed.
摘要翻译:一种制备式I的光学活性链烷醇的方法,其中n为0至5的整数; Cyc是任选取代的单或多核饱和或不饱和的碳环或杂环,R1是卤素,SH,OH,NO2,NR2R3或NR2R3R4 + X-,R2,R3和R4彼此独立地是氢 或低级烷基或低级烷氧基,X是抗衡离子,该方法包括在包含式II的烷酮的培养基中孵育,其中n,Cyc和R 1如上定义,具有多肽序列(i)SEQ ID NO: SEQ ID NO:1或(ii)其中与SEQ ID NO:1相比,通过缺失,插入,取代或其组合改变多达25%的氨基酸基团,并且其保留至少50%的 酶活性为SEQ ID NO:1,其中式II化合物被酶还原,得到式I化合物,并分离形成的产物。
摘要:
The present invention relates to enzymic and nonenzymic processes for preparing 3-methylamino-1-(thien-2-yl)propan-1-ol; as well as to enzymes for implementing these processes; and to nucleic acid sequences encoding these enzymes, to expression cassettes containing these nucleic acid sequences, to vectors and to recombinant hosts.
摘要:
A process for preparing optically active alkanols of the formula I in which n is an integer from 0 to 5; Cyc is an optionally substituted, mono- or polynuclear, saturated or unsaturated, carbocyclic or heterocyclic ring, and R1 is halogen, SH, OH, NO2, NR2R3 or NR2R3R4+X−, with R2, R3 and R4 independently of one another being hydrogen or a lower alkyl or lower alkoxy radical and X− being a counterion, which process comprises incubating in a medium comprising alkanone of the formula II in which n, Cyc and R1 are as defined above, an enzyme having a polypeptide sequence (i) SEQ ID NO: 1 or (ii) in which, compared to SEQ ID NO:1, up to 25% of the amino acid radicals have been altered by deletion, insertion, substitution or a combination thereof and which retains at least 50% of the enzymic activity of SEQ ID NO:1, with the compound of the formula II being enzymically reduced to give the compound of the formula I, and isolating the product formed.
摘要翻译:一种制备式I的光学活性链烷醇的方法,其中n为0至5的整数; Cyc是任选取代的单或多核饱和或不饱和的碳环或杂环,R1是卤素,SH,OH,NO2,NR2R3或NR2R3R4 + X-,R2,R3和R4彼此独立地是氢 或低级烷基或低级烷氧基,X是抗衡离子,该方法包括在包含式II的烷酮的培养基中孵育,其中n,Cyc和R 1如上定义,具有多肽序列(i)SEQ ID NO: SEQ ID NO:1或(ii)其中与SEQ ID NO:1相比,通过缺失,插入,取代或其组合改变多达25%的氨基酸基团,并且其保留至少50%的 酶活性为SEQ ID NO:1,其中式II化合物被酶还原,得到式I化合物,并分离形成的产物。
摘要:
The present invention relates to enzymic processes for preparing S-butan-2-ol; and to enzymes for carrying out said processes; to nucleic acid sequences coding for said enzymes, to expression cassettes, vectors and recombinant hosts containing said nucleic acid sequences.
摘要:
The present Invention relates to new nitrilases with modified Substrate acceptance, the method to obtain them and the use of the aforesaid nitrilases. Said nitrilases are encoded by a polypeptide sequence, which at a Position corresponding to Position 296 in wild-type Alcaligenes faecalis comprises an amino acid which is not tyrosine. The Invention further relates to nucleic acid sequences and amino acid sequences encoding Said nitrilases, expression constructs comprising Said nucleic acid sequences, vectors comprising the nucleic acid sequences or the exPression constructs, to organisms, preferably microorganisms, comprising the nucleic acid sequences, expression constructs or vectors. The Invention additionally relates to a method for preparing carboxylic acids, preferably substituted chiral carboxylic acids from racemic nitriles.
摘要:
A method for enzymatic preparation of compounds of the general formula (2) from unsaturated alkene derivatives of the general formula (1) by reducing a compound of the formula (1) in the presence of a reductase, comprising at least one of the polypeptide sequences SEQ ID NO: 1, 2 or 3 or having a functionally equivalent polypeptide sequence which is at least 80% identical to SEQ ID NO: 1, 2 or 3.
摘要翻译:一种通过在还原酶的存在下还原式(1)的化合物,从通式(1)的不饱和烯烃衍生物中酶制备通式(2)的化合物的方法,所述方法包括至少一种多肽序列 具有与SEQ ID NO:1,2或3至少80%相同的功能等同多肽序列的SEQ ID NO:1,2或3。
摘要:
A method for enzymatic preparation of compounds of the general formula (2) from unsaturated alkene derivatives of the general formula (1) by reducing a compound of the formula (1) in the presence of a reductase, comprising at least one of the polypeptide sequences SEQ ID NO: 1, 2 or 3 or having a functionally equivalent polypeptide sequence which is at least 80% identical to SEQ ID NO: 1, 2 or 3.
摘要翻译:一种通过在还原酶的存在下还原式(1)的化合物,从通式(1)的不饱和烯烃衍生物中酶制备通式(2)的化合物的方法,所述方法包括至少一种多肽序列 具有与SEQ ID NO:1,2或3至少80%相同的功能等同多肽序列的SEQ ID NO:1,2或3。
摘要:
The invention relates to novel proteins from Pseudomonas glumae, having esterase activity, in particular butynol I esterase activity, to nucleic acid sequences coding therefor, to expression cassettes, vectors and recombinant microorganisms; to methods for preparing said proteins and to the use thereof for enzymic, in particular enantioselective enzymic, ester hydrolysis or transesterification of organic esters.
摘要:
A method for the enzymatic preparation of amino acids of the general formula (3) or (4) from alpha-dehydroamino acids of the general formula (1) or (2) wherein R1, R2 are independently of one another H, C1-C6 alkyl, C2-C6 alkenyl, an optionally substituted carbo- or heterocyclic, aromatic or nonaromatic radical, or an alkylaryl radical, or a carboxyl radical (—COOR), R3 is H, formyl, acetyl, propionyl, benzyl, benzyloxycarbonyl, BOC, Alloc, R is H, C1-C6 alkyl, aryl, by reducing a compound of the formula (1) or (2) in the presence of a reductase.
摘要:
The invention relates to novel proteins from Pseudomonas glumae, having esterase activity, in particular butynol I esterase activity, to nucleic acid sequences coding therefor, to expression cassettes, vectors and recombinant microorganisms; to methods for preparing said proteins and to the use thereof for enzymic, in particular enantioselective enzymic, ester hydrolysis or transesterification of organic esters.