Asymchem Life Science (Tianjin) Co., Ltd

Asymchem Laboratories (Tianjin) Co., Ltd.

Jilin Asymchem Laboratories Co., Ltd.

Asymchem Laboratories (Fuxin) Co., Ltd.

Tianjin Asymchem Pharmaceuticals Co., Ltd.

Tianjin Asymchem Pharmaceutical Co., Ltd.

Asymchem Life Sciences (Tianjin) Co., Ltd.

Asymchem Life Science Co., Ltd.

Na Zhang

Jiangping Lu

Hao Hong

Kejian Zhang

Xuecheng Jiao

Gage James

Yulei Ma

Fang Liu

Wenyan Yu

Yi Xiao

Rui Li

Yibing Cheng

Yiming Yang

Xin Huang

Huiyan Mu

Yu Xuan Zhang

Yanjun Li

James Gage

Ye Liu

Xingfu Xu

Yuxia Cui

Junjie Yan

Juan Gao

Zujian Wang

Junlu Wei

Jiadong Zhao

Junqi Zhao

Feng Gao

Lina Guo

Yu Zhang

Yanyan Gao

Vyasarayani Williams Rajasekar

Mujiao Zhang

Xuewu Dong

Wanming Shi

Xiang Wang

Mingmin Hao

Lihui Liu

Kaihua Sun

Shan Cao

Esterase Mutant and Use thereof

An amino acid sequence of the transaminase mutant is an amino acid sequence obtained by a mutation of an amino acid sequence is shown in SEQ ID NO: 1. The mutation occurred at least one of the following mutation sites: G17V, L36P, Q40H, G69Y, H70T, L73A, V77G, V77S, V77T, A78I, Y130M, Y130V, Y130T, N132I, N132T, K141S, K142S, K142T, R143P, G144F, G144W, G144Y, E145D, E145S, E145G, K146R, L148A, L148I and the like.

Transaminase mutant and use thereof

Provided are a transaminase mutant and use thereof. The transaminase mutant has an amino acid sequence obtained by mutation of an amino acid sequence shown in SEQ ID NO:1, the mutation at least includes one of the following mutation site combinations: T7C+S47C, Q78C+A330C, V137C+G313C, A217C+Y252C and L295C+C328C; or the transaminase mutant has an amino acid sequence which has the mutation sites in the mutated amino acid sequence and has 80% or more identity with the mutated amino acid sequence. The transaminase mutant realizes the change of protein structure and functions, reduces the enzyme amount, increases the enantiomeric excess (ee) value of a product, and reduces the difficulty of post-processing, so that the transaminase mutant may be suitable for industrial production.

Disclosed are a monooxygenase mutant and use thereof. An amino acid sequence of a monooxygenase mutant is an amino acid sequence obtained by mutating an amino acid sequence as shown in SEQ ID NO: 1. Mutation includes at least one of the following mutation sites: site 49, site 60, site 61, site 144, site 145, site 146, site 147, site 167, site 169, site 189, site 246, site 247, site 280, site 284, site 285, site 286, site 287, site 328, site 330, site 332, site 382, site 427, site 428, site 429, site 430, site 431, site 432, site 433, site 434, site 435, site 436, site 438, site 441, site 493, site 494, site 508, site 509, site 510, site 511, site 512, and site 513 sites and the like.

Monooxygenase mutant and use thereof

Provided is a ketoreductase mutant and a method for producing chiral alcohol using the same. The ketoreductase mutant has a sequence with amino acid mutations in the sequence shown in SEQ ID NO:1. The mutation sites include at least one of the following positions: 6th position, 21st position, 42nd position, 58th position, 61st position, 76th position, 87th position, 94th position, 96th position, 108th position, 113th position, 117th position, 144th position, 146th position, 147th position, 149th position, 151st position, 152nd, 156th position, 165th position, 177th position, and 198th position.

Ketoreductase mutant and method for producing chiral alcohols

Provided are a transaminase mutant and a method for producing a chiral amine using the same. An amino acid sequence of the transaminase mutant is an amino acid sequence obtained by mutation occurred in an amino acid sequence as shown in SEQ ID NO: 1, and the mutation includes at least one of the following mutation sites: position 3, position 5, position 8, position 25, position 32, position 45, position 56, position 59, position 60, position 84, position 86, position 164, position 176, position 178, position 180, position 187, position 197, position 206, position 207, position 242, position 245, position 319 and position 324.

Disclosed are a modified epoxy resin immobilized enzyme, a preparation method therefor and an application thereof. Herein, the preparation method includes the following steps: modifying an epoxy resin, adding a polyethyleneimine to a modified epoxy resin for further modification, and then adding an enzyme to be immobilized and a glutaraldehyde for immobilization, to obtain the modified epoxy resin immobilized enzyme. The epoxy resin is modified, the polyethyleneimine is added to the modified epoxy resin for the further modification, and an aldehyde group in the resin and an amino group in the polyethyleneimine are covalently bound to each enzyme, then it is activated by the bifunctional reagent glutaraldehyde.

Modified epoxy resin immobilized enzyme, preparation method therefor and application thereof

An amino acid sequence of the monooxygenase mutant is obtained by mutation of an amino acid sequence shown in SEQ ID NO: 1, and the mutation at least includes one of the following mutation sites: 45-th site, 95-th site, 106-th site, 108-th site, 114-th site, 186-th site, 190-th site, 191-th site, 249-th site, 257-th site, 393-th site, 436-th site, 499-th site, 500-th site, 501-th site, 503-th site, 504-th site, 559-th site, and 560-th site.

Provided are a proline hydroxylase and uses thereof. The proline hydroxylase comprises having the amino acid sequence of SEQ ID NO: 2 with the exception of a mutation of one or more amino acids; wherein the mutation of one or more amino acids must comprises E27K, and the mutation of one or more amino acids selected from the group consisting of: H14R, L16N, T25R, F26L, E27K, D30S, S33N, E34N, E34G, E34L, E34S, E34D, Y35W, Y35K, S37W, S37F, S37E, S37N, S37T, S37C, W40F, K41E, D54G, H55Q, S57L, I58T, I58Y, I58A, I58R, I58V, I58S, I58C, K86P, T91A, F95Y, C97Y, I98V, K106V, K106T, K106Q, F111S, K112E, K112R, S154A, K162E, L166M, I118F, I118V, I118R, H119R, H119F, I120V, K123D, K123N, K123Q, K123S, K123I, K123T, T130N, D134G, V135K, N165H, D173G, K209R, I223V and S225A, and having proline hydroxylase activity.

Proline hydroxylase and uses thereof

The present application relates to the technical field of genetic engineering, and provides a monooxygenase mutant, a preparation method and application thereof. The monooxygenase mutant has any one of the amino acid sequences shown in (I) and (II): (I) an amino acid sequence having at least 80% identity with the amino acid sequence shown in SEQ ID NO. 1; and (II) an amino acid sequence obtained by modifying, substituting, deleting, or adding one or several amino acids to the amino acids at 23 to 508 positions of the amino acid sequence shown in SEQ ID NO. 1, the substituting referring to a substitution of 1 to 34 amino acids, wherein the mutant has the activity of monooxygenase.

Monooxygenase mutant, preparation method and application thereof

Provided is an amino acid dehydrogenase mutant. The amino acid sequence of the mutant is obtained by mutating the amino acid sequence shown in SEQ ID NO:1. The mutation includes at least one of the following mutation sites: 64th, 94th, 133rd, 137th, 148th, 168th, 173rd, 183 rd, 191st, 207th, 229th, 248th, 255th and 282nd sites; or the amino acid sequence of the amino acid dehydrogenase mutant is an amino acid sequence having the mutation sites in the mutated amino acid sequence and having a 80% or more homology with the mutated amino acid sequence. The mutant enzyme activity is more than 50 times higher than that of wild amino acid dehydrogenase, and the enzyme specificity is also correspondingly improved.

Amino acid dehydrogenase mutant and use thereof

Disclosed are transaminase mutants and use thereof. The amino acid sequence of the transaminase mutant is obtained by the mutation of the amino acid sequence as shown in SEQ ID NO: 1, and the mutation at least comprises one of the following mutation sites: the 19-th site, the 41-th site, the 43-th site, the 72-th site, the 76-th site, the 92-th site, the 107-th site, the 125-th site, the 132-th site, the 226-th site, the 292-th site, the 295-th site, the 308-th site, and the 332-th site; and the 19-th site is mutated into a serine, the 41-th site is mutated into a serine, the 43-th site is mutated into an asparagine, a glycine in the 72-th site is mutated into a leucine, etc.; or the amino acid sequence of the transaminase mutant has the mutation sites in the mutanted amino acid sequence, and has more than 80% homology to the mutanted amino acid sequence.

The invention provides a transaminase mutant and application thereof, wherein the amino acid sequence of the transaminase mutant is formed after mutation of the amino acid sequence as shown in SEQ ID NO: 1, and mutated amino acid sites comprise T7C+S47C sites. The transaminase mutant having the mutation sites can be further prepared into an immobilized enzyme through an immobilization technology, the immobilized enzyme has relatively high activity and high stability, can be recycled for multiple times, and is applicable to continuous flow reaction in a packed bed.

Transaminase mutant and application thereof

A ketoreductase mutant and use thereof are provided. The amino acid sequence of the ketoreductase mutant is an amino acid sequence obtained by mutation of the amino acid sequence shown in SEQ ID NO: 1, wherein the mutation at least comprises one of the following mutation sites: position 6, position 94, position 96, position 117, position 144, position 156, position 193, position 205, position 224, position 176, position 85 and position 108; alternatively, the amino acid sequence of the ketoreductase mutant has a mutation site in a mutated amino acid sequence and an amino acid sequence having 80% or more homology with the mutated amino acid sequence.

Ketoreductase mutant and application thereof

Provided are a proline hydroxylase and uses thereof. The proline hydroxylase comprises (a) a protein having the amino acid sequence as shown in SEQ ID NO: 2; (b) a protein having an amino acid sequence of SEQ HD NO: 2 with a mutation of one or more amino acids and having a proline hydroxylase activity; or (c) a protein retaining the mutation of one or more amino acids as in (b), and having the proline hydroxylase activity and having at least 78% homology with the amino acid sequence of the protein in (b). Protein having the amino acid sequence as shown in SEQ HD NO: 2 and mutants obtained by genetically engineering have higher catalytic specificity or significantly increased catalytic activity when compared to proline hydroxylases in prior art.

Growing community of inventors

Tianjin, China

Na Zhang