7,13-O,O-diacetyl-2-O-debenzoylbaccatin III 、 2-Furoyl-CoA 在
mutant 2-O-debenzoylbaccatin III 2-O-benzoyltransferase, containing point mutations: Q19P and N23K 作用下,
生成 7,13-O,O-diacetyl-2-O-debenzoyl-2-O-(2-furancarbonyl)baccatin III
参考文献:
名称:
Point Mutations (Q19P and N23K) Increase the Operational Solubility of a 2α-O-Benzoyltransferase that Conveys Various Acyl Groups from CoA to a Taxane Acceptor
摘要:
Two site-directed Mutations within the wild-type 2-O-benzoyltransferase (tbt) cDNA, from Taxus cuspidata plants, yielded air encoded protein containing replacement amino acids at Q19P and N23K that trial) to a solvent-exposed loop region. The likely significant changes in the biophysical properties invoked by these mutations Caused the overexpressed, modified TBT (mTBT) to partition into the Soluble enzyme fraction about 5-fold greater than the wild-type enzyme. Sufficient protein could now be acquired to examine the scope of the substrate specificity of mTBT by incubation with 7,13-O,O-diacetyl-2-O-debenzoylbaceatin III that was mixed individually with various substituted benzoyls, alkanoyls, and (E)-butenoyl CoA donors. The mTBT catalyzed the conversion of each 7,13-O,O-diacetyl-2-O-debenzoylbaccatin III to several 7,13-O,O-diacetyl-2-O-acyl-2-O-debenzoylbaccatin III analogues. The relative catalytic efficiency of mTBT with the 7,13-O,O-diacetyl-2-O-debenzoyl surrogate Substrate and heterole carbonyl CoA substrates was slightly greater than with the natural aroyl substrate benzoyl CoA, While substituted benzoyl CoA thioesters were less productive. Short-chain hydrocarbon carbonyl and cyclohexanoyl CoA thioesters were also productive, where C-4 Substrates were transferred by mTBT with similar to 10- to 17-fold greater catalytic efficiency compared to the transfer of benzoyl. The described broad specificity of mTBT suggests (flat a plethora of 2-O-acyl variants of the antimitotic paclitaxel can be assembled through biocatalytic sequences.
Novel microorganism and its use in lignocellulose detoxification
申请人:Shell Internationale Research Maatschappij B.V.
公开号:EP2295534A1
公开(公告)日:2011-03-16
The present invention relates to an isolated microorganism which is Cupriavidus basilensis strain HMF14 Deposit number DSM 22875, and its use in a process for the in-situ detoxification of lignocelluloses hydrolysate.
Novel microorganism and its use in lignocellulose detoxifixcation
申请人:Shell Internationale Research Maatschappij B.V.
公开号:EP2308959A1
公开(公告)日:2011-04-13
The present invention relates to an isolated microorganism which is Cupriavidus basilensis strain HMF14 Deposit number DSM 22875, and its use in a process for the in-situ detoxification of lignocelluloses hydrolysate
WATER SOLUBLE COMPOSITIONS INCORPORATING ENZYMES, AND METHOD OF MAKING SAME
申请人:Monosol, LLC
公开号:EP3354716A1
公开(公告)日:2018-08-01
Disclosed herein are water soluble compositions, such as films, including a mixture of a first water-soluble resin, an enzyme, and an enzyme stabilizer which comprises a functional substrate for the enzyme, methods of making such compositions, and methods of using such compositions, e.g. to make packets containing functional ingredients. The enzymes can include proteases and mixtures of proteases with other enzymes, and the compositions provide good retention of enzyme function following film processing and storage.
Methods for conducting assays for enzyme activity on protein microarrays
申请人:Zhou X. Fang
公开号:US20050118665A1
公开(公告)日:2005-06-02
The present invention relates to methods of conducting assays for enzymatic activity on microarrays useful for the large-scale study of protein function, screening assays, and high-throughput analysis of enzymatic reactions. The invention relates to methods of using protein chips to assay the presence, amount, activity and/or function of enzymes present in a protein sample on a protein chip. In particular, the methods of the invention relate to conducting enzymatic assays using a microarray wherein a protein and a substance are immobilized on the surface of a solid support and wherein the protein and the substance are in proximity to each other sufficient for the occurrence of an enzymatic reaction between the substance and the protein. The invention also relates to microarrays that have an enzyme and a substrate immobilized on their surface wherein the enzyme and the substrate are in proximity to each other sufficient for the occurrence of an enzymatic reaction between the enzyme and the substrate.
NOVEL MICROORGANISM AND ITS USE IN LIGNOCELLULOSE DETOXIFICATION
申请人:KOOPMAN Frank Wouter
公开号:US20110086395A1
公开(公告)日:2011-04-14
An isolated microorganism is provided which is
Cupriavidus basilensis
strain HMF14 Deposit number DSM 22875, and its use in a process for the in-situ detoxification of lignocelluloses hydrolysate.