Probing the mechanism of 1,4-conjugate elimination reactions catalyzed by terpene synthases.
Probing the mechanism of 1,4-conjugate elimination reactions catalyzed by terpene synthases.
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DOI:
10.1021/ja311022s
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发表时间:
2012-12-26
影响因子:
15
通讯作者:
Allemann, Rudolf K.
中科院分区:
文献类型:
--
作者:
Faraldos, Juan A.;Gonzalez, Veronica;Li, Amang;Yu, Fanglei;Koeksal, Mustafa;Christianson, David W.;Allemann, Rudolf K.
The reaction mechanisms of (E)-β-farnesene synthase (EBFS) and isoprene synthase (ISPS), enzymes that catalyze a formal regioespecific 1,4-conjugate elimination of hydrogen-diphosphate from (E, E)-farnesyl and dimethylallyl diphosphate (FDP and DMADP) to generate the semiochemicals (E)-β-farnesene and isoprene, respectively, were probed with substrate analogs and kinetic measurements. The results support stepwise reaction mechanisms through analogous enzyme-bound allylic cationic intermediates. For EBFS, we demonstrate that the elimination reaction can proceed via the enzyme-bound intermediate trans-nerolidyl diphosphate, while for ISPS the intermediacy of 2-methylbut-3-enyl 2-diphosphate can be inferred from the product outcome when deuterated DMADPs are used as substrates. Possible implications derived from the mechanistic details of the EBFS catalyzed reaction for the evolution of sesquiterpene synthases are discussed.
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影响因子:
2.1
作者:
Dolence, JM;Poulter, CD
通讯作者:
Poulter, CD
影响因子:
1.9
作者:
Francis, F;Vandermoten, S;Haubruge, E
通讯作者:
Haubruge, E
影响因子:
64.8
作者:
EDWARDS, LJ;SIDDALL, JB;KISLOW, CJ
通讯作者:
KISLOW, CJ
DOI:
10.1073/pnas.94.24.12833
发表时间:
1997-11-25
影响因子:
11.1
作者:
Crock, J;Wildung, M;Croteau, R
通讯作者:
Croteau, R
影响因子:
4.1
作者:
Bruce, TJA;Birkett, MA;Wadhams, LJ
通讯作者:
Wadhams, LJ