Effects of Gln102Arg and Cys97Gly mutations on the structural specificity and stereospecificity of the L-lactate dehydrogenase from Bacillus stearothermophilus
作者:Helmut K. W. Kallwass、Marcel A. Luyten、Wendy Parris、Marvin Gold、Cyril M. Kay、J. Bryan Jones
DOI:10.1021/ja00038a016
日期:1992.6
The L-lactatedehydrogenase of Bacillusstearothermophilus (BSLDH) is a thermostable enzyme with considerable potential for applications in asymmetric synthesis. An understanding of the factors controlling its structural specificity and stereospecificity is therefore of interest. In this paper the effects of GIn 102→Arg and Cys97→Gly mutations have been evaluated. In a survey of thirteen 2-keto acids
3-methyl-2-oxobutanoate hydroxymethyltransferase from E. coli (KPHMT) and variants thereof. The 3,3,3-trisubstituted 2-oxoacids thus produced were converted into 2-oxolactones and 3-hydroxy acids and directly to ulosonic acid derivatives, all bearing gem-dialkyl, gem-cycloalkyl, and spirocyclic quaternary centers. In addition, some of these reactions use a single enantiomer from racemic nucleophiles to afford
Fluorinated
<i>S</i>
‐Adenosylmethionine as a Reagent for Enzyme‐Catalyzed Fluoromethylation
作者:Jiaming Peng、Cangsong Liao、Carsten Bauer、Florian P. Seebeck
DOI:10.1002/anie.202108802
日期:2021.12.20
In a biocatalytic approach to the production of fluorinated compounds, halide methyltransferases (HMTs) were found to form fluorinated S-adenosylmethionine (SAM) from S-adenosylhomocysteine and fluoromethyliodide. Although too unstable for isolation, fluorinated SAM was accepted as a substrate by C-, N- and O-specific SAM-dependent methyltransferases (MTs) to enable the fluoromethylation of small molecules
在生产含氟化合物的生物催化方法中,发现卤化物甲基转移酶 (HMT ) 从S-腺苷高半胱氨酸和氟甲基碘形成氟化S-腺苷甲硫氨酸 (SAM) 。虽然对于分离来说太不稳定,但氟化 SAM 被 C、N 和 O 特异性 SAM 依赖性甲基转移酶 (MTs) 接受为底物,以实现小分子的氟甲基化(见方案)。
Heterocyclic compounds
申请人:Carruthers I. Nicholas
公开号:US20050085487A1
公开(公告)日:2005-04-21
Heterocyclic compounds and methods of making them and using them.
杂环化合物及其制备和使用方法。
Method to treat allergic rhinitis
申请人:——
公开号:US20040132715A1
公开(公告)日:2004-07-08
A method to treat allergic rhinitis is disclosed in which patients are administered certain indolyl compounds.