Discovery and Redesign of a Family VIII Carboxylesterase with High (<i>S</i>)-Selectivity toward Chiral <i>sec</i>-Alcohols
作者:Areum Park、Seongsoon Park
DOI:10.1021/acscatal.1c05410
日期:2022.2.18
Furthermore, the (S)-selectivity of PBE has been significantly improved by rationalredesign based on molecular modeling. Molecular modeling identified a binding pocket composed of Ser381, Ala383, and Arg408 for the methyl substituent of (R)-1-phenylethyl acetate and suggested that larger residues may increase the enantioselectivity by interfering with the binding of the slow-reacting enantiomer. As predicted
高度对映选择性脂肪酶已广泛用于通过动力学或动态动力学拆分制备通用的对映纯手性仲醇。脂肪酶本质上是( R )-选择性的,很难获得( S )-选择性脂肪酶。VIII 族羧酸酯酶的最新晶体结构表明,其催化三联体的空间阵列是脂肪酶的镜像,但催化三联体不同于脂肪酶。因此,我们假设 VIII 族羧酸酯酶可能对类似于 ( S ) 的仲醇表现出( S )-对映选择性。)-选择性丝氨酸蛋白酶,其催化三联体也在空间上排列为它的镜像。在这项研究中,制备了一种已知家族 VIII 羧酸酯酶(pdb 代码:4IVK)的同源酶(来自变形杆菌SG_bin9 的羧酸酯酶,PBE),该酶不仅对3-丁炔等仲醇具有中等的 ( S )-选择性。-2-醇和1-苯乙醇以及( R )-对所探索的底物中特定仲醇的选择性。此外,(S)-PBE 的选择性已通过基于分子模型的合理重新设计显着提高。分子模型确定了一个由 Ser381、Ala383
Enhancing enantioselectivity of Candida antarctica lipase B towards chiral sec-alcohols bearing small substituents through hijacking sequence of A homolog
作者:Seonghyeon Yi、Seongsoon Park
DOI:10.1016/j.tetlet.2021.153186
日期:2021.7
Candidaantarctica lipase B (CAL-B) exhibits extraordinary enantioselectivitytowards most chiral sec-alcohols but not towards sec-alcohols bearing substituents smaller than a propyl group (i.e., (±)-but-3-yn-2-ol (E = 4) and (±)-butan-2-ol (E = 7)). Previously, we reported a homologous enzyme (lipase from Pseudozyma brasiliensis GHG001, PBL) of CAL-B, which exhibited high enantioselectivity of CAL-B
南极假丝酵母脂肪酶 B (CAL-B) 对大多数手性仲醇表现出非凡的对映选择性,但对带有小于丙基取代基的仲醇(即(±)-but-3-yn-2-ol ( E = 4) 和 (±)-butan-2-ol ( E = 7))。此前,我们报道了CAL-B 的一种同源酶(来自巴西假酵母 GHG001 的脂肪酶,PBL),其对 CAL-B 对 (±)-but-3-yn-2-ol ( E > 200)。基于该结果,我们假设它们的局部序列或结构的比较将为增强CAL-B的对映选择性提供线索。在本文中,我们报告了通过用 CAL-B 的局部序列替换 CAL-B 的局部序列来增强 CAL-B 对 (±)-but-3-yn-2-ol 和 (±)-butan-2-ol 的对映选择性PBL。CAL-B 的序列取代突变体对 (±)-but-3-yn-2-ol ( E > 200) 和 (±)-butan-2-ol (
Levodopa dimethyl-substituted diester prodrugs compositions, and methods of use
申请人:Xiang Jia-Ning
公开号:US20080214663A1
公开(公告)日:2008-09-04
Levodopa dimethyl-substituted diester prodrugs pharmaceutical, compositions comprising levodopa dimethyl-substituted diester prodrugs, and methods of using such prodrugs and pharmaceutical compositions for treating diseases such as Parkinson's disease are provided.
LEVODOPA DIMETHYL-SUBSTITUTED DIESTER PRODRUGS, COMPOSITIONS, AND METHODS OF USE
申请人:Xiang Jia-Ning
公开号:US20100173992A1
公开(公告)日:2010-07-08
Levodopa dimethyl-substituted diester prodrugs pharmaceutical, compositions comprising levodopa dimethyl-substituted diester prodrugs, and methods of using such prodrugs and pharmaceutical compositions for treating diseases such as Parkinson's disease are provided.