Mutational Analysis of Linalool Dehydratase Isomerase Suggests That Alcohol and Alkene Transformations Are Catalyzed Using Noncovalent Mechanisms
Mutational Analysis of Linalool Dehydratase Isomerase Suggests That Alcohol and Alkene Transformations Are Catalyzed Using Noncovalent Mechanisms
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芳樟醇脱水酶异构酶的突变分析表明酒精和烯烃的转化是通过非共价机制催化的
DOI:
10.1021/acscatal.0c02958
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发表时间:
2020
期刊:
影响因子:
12.9
通讯作者:
Cuetos A
中科院分区:
文献类型:
--
作者:
Cuetos A
The interconversion of non-activated alkenes and alcohols, catalyzed by (de)hydratases, has great potential in biotechnology for the generation of fine and bulk chemicals. LinD is a cofactor-independent enzyme that catalyzes the reversible (de)hydration of the tertiary alcohol (S)-linalool to the triene beta-myrcene, and also its isomerization to the primary alcohol geraniol. Structure-informed mutagenesis of LinD, followed by activity studies, confirmed essential roles for residues C171, C180 and H129 in water activation for the hydration of beta-myrcene to linalool. However, no evidence of covalent thioterpene intermediates was found using either X-ray crystallography, mass spectrometry, or QM/MM nudged elastic band simula-tions. Labelling and NMR experiments confirmed a role for residue D39 in (de)protonation of the linalool carbon C10 in the isomerization of linalool to geraniol and also the intermediacy of beta-myrcene in this isomerization reaction. X-ray, molecular dynamics and activity studies also suggested a significant role in catalysis for a mobile methionine residue M125, which exists in substantially altered orientations in different mutant structures.
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影响因子:
--
作者:
C. Wuensch;Johannes Gross;G. Steinkellner;K. Gruber;S. M. Glueck;K. Faber
通讯作者:
K. Faber
影响因子:
12.9
作者:
Stefan E. Payer;Hannah Pollak;S. M. Glueck;K. Faber
通讯作者:
K. Faber
影响因子:
5
作者:
Hiseni A;Otten LG;Arends IWCE
通讯作者:
Arends IWCE
影响因子:
62.1
作者:
Christianson DW
通讯作者:
Christianson DW
DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
P. Kuhn;D. A. Smith
通讯作者:
D. A. Smith