Microscale synthesis and kinetic isotope effect analysis of (4R)-[Ad-(14)C, 4-(2)H] NADPH and (4R)-[Ad-(3)H,4-(2)H] NADPH.
Microscale synthesis and kinetic isotope effect analysis of (4R)-[Ad-(14)C, 4-(2)H] NADPH and (4R)-[Ad-(3)H,4-(2)H] NADPH.
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DOI:
10.1002/jlcr.1660
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发表时间:
2009-09-15
影响因子:
1.8
通讯作者:
Kohen, Amnon
中科院分区:
文献类型:
--
作者:
Yahashiri, Atsushi;Sen, Arundhuti;Kohen, Amnon
关键词:
We present a one-pot chemo-enzymatic microscale synthesis of NADPH with two different patterns of isotopic labels: (4R)-[Ad-14C,4-2H] NADPH and (4R)-[Ad-3H,4-2H] NADPH. These co-factors are required by an enormous range of enzymes, and isotopically labeled nicotinamides are consequently of significant interest to researchers. In the current procedure, [Ad-14C] NAD+ and [Ad-3H] NAD+ were phosphorylated by NAD+ kinase to produce [Ad-14C] NADP+ and [Ad-3H] NADP+, respectively. Thermoanaerobium brockii alcohol dehydrogenase was then used to stereospecifically transfer deuterium from C2 of isopropanol to the re face of C4 of NADP+. After purification by HPLC, NMR analysis indicated the deuterium content at the 4R position is more than 99.7 %. The labeled cofactors were then used to successfully and sensitively measure kinetic isotope effects for R67 dihydrofolate reductase, providing strong evidence for the utility of this synthetic methodology.
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影响因子:
1.8
作者:
Markham, Kelli A.;Kohen, Amnon
通讯作者:
Kohen, Amnon
影响因子:
2.9
作者:
McCracken, JA;Wang, T;Kohen, A
通讯作者:
Kohen, A
DOI:
10.1073/pnas.0606976103
发表时间:
2006-10-24
影响因子:
11.1
作者:
Wang, Lin;Goodey, Nina M.;Kohen, Amnon
通讯作者:
Kohen, Amnon
影响因子:
2.9
作者:
Yahashiri, Atsushi;Howell, Elizabeth E.;Kohen, Amnon
通讯作者:
Kohen, Amnon
DOI:
10.1098/rstb.2006.1871
发表时间:
2006-08-29
影响因子:
6.3
作者:
Wang, Lin;Goodey, Nina M.;Kohen, Amnon
通讯作者:
Kohen, Amnon