A 38 kDa allylic alcohol dehydrogenase from the cultured cells of Nicotiana tabacum
摘要:
An NADP(+)-dependent alcohol dehydrogenase (allyl-ADH) was isolated from the cultured cells of Nicotiana tabacum. The allyl-ADH was found to be efficient for the dehydrogenation of secondary allylic alcohols rather than saturated secondary alcohols and it was specific for the S-stereoisomer of the alcohols. The enzyme catalyzed the reversible reaction whereby the carbonyl group of enones is reduced to the corresponding allylic alcohol or vice versa. Two possible primary structures of the allyl-ADH were deduced by the sequence analyses of full-length cDNAs (ally-ADH1 and ally-ADH2), which were cloned by the PCR method. These analyses indicated that the allyl-ADHs are composed of 343 amino acids having the molecular weights 38 083 and 37 994, respectively, and they showed approximately 70% homology to the NADP(+)-dependent oxidoreductases belonging to a plant zeta -crystallin family. (C) 2000 Elsevier Science Ltd. All rights reserved.
Heterogeneous Hydroxyl-Directed Hydrogenation: Control of Diastereoselectivity through Bimetallic Surface Composition
作者:Alexander J. Shumski、William A. Swann、Nicole J. Escorcia、Christina W. Li
DOI:10.1021/acscatal.1c01434
日期:2021.5.21
surface. In this work, we demonstrate that Pd–Cu bimetallic nanoparticles with both Pd and Cu atoms distributed across the surface are capable of high conversion and diastereoselectivity in the hydroxyl-directed hydrogenation reaction of terpinen-4-ol. We postulate that the OH directing group adsorbs to the more oxophilic Cu atom while the olefin and hydrogen bind to adjacent Pd atoms, thus enabling selective
Enantioselectivity in the Biotransformation of Mono- and Bicyclic Monoterpenoids with the Cultured Cells of<i>Nicotiana tabacum</i>
作者:Hiroki Hamada
DOI:10.1246/bcsj.61.869
日期:1988.3
The biotransformation of the enantiomeric pairs of p-menthane and bicyclo[2.2.1] and [3.1.1]heptane derivatives with the culturedcells of Nicotianatabacum was investigated. It was found that (i) the culturedcells discriminate the enantiomers of p-menthan-2-ol and bicyclo[2.2.1]heptan-2-ol and bicyclo[3.1.1]heptan-3-ol derivatives, and enantioselectively convert these alcohols to the corresponding
Abstract In newly initiated cellsuspension cultures of Nicotianatabacum , (4 R )-(−) and (4 S )(+)-carvoximes and (1 S ,4 R )(+)-dihydrocarvoxime were hydrolysed to the corresponding ketones and then the resultant ketones were reduced to the corresponding alcohols.
摘要 在烟草新开始的细胞悬浮培养中,(4 R )-(-) 和(4 S )(+)-香芹酮肟和(1 S ,4 R )(+)-二氢香芹酮肟被水解成相应的酮,然后生成的酮被还原为相应的醇。
Stereoselectivity of the reduction of carvone and dihydrocarvone by suspension cells of Nicotiana tabacum
作者:Toshifumi Hirata、Hiroki Hamada、Tadashi Aoki、Takayuki Suga
DOI:10.1016/0031-9422(82)85179-0
日期:——
Abstract The biotransformation of foreign substrates with suspensioncells of Nicotianatabacum was tested with (4 R )-(−)- and (4 S )-(+)-carvones, (
摘要 用 (4 R )-(-)- 和 (4 S )-(+)-香芹酮测试了烟草悬浮细胞对外来底物的生物转化,(
Organic reactions in a solid matrix-VII sodium on alumina : A convenient reagent for reduction of ketones, esters and oximes
作者:Satendra Singh、Sukh Dev
DOI:10.1016/s0040-4020(01)80249-0
日期:1993.1
Sodium dispersed on alumina is described and evaluated as a convenient off-the-shelf reagent (in a wax-coated form) for reduction of ketones, esters and oximes. While isopropanol is the preferred proton donor for the reduction of ketones and oximes, t-butanol is the alcohol of choice for the reduction of esters.