Bio-activation of 4-alkyl analogs of 1,4-dihydropyridine mediated by cytochrome P450 enzymes
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| 024 | 7 | 0 | |a 10.1007/s00775-015-1252-8 |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s00775-015-1252-8 | ||
| 245 | 0 | 0 | |a Bio-activation of 4-alkyl analogs of 1,4-dihydropyridine mediated by cytochrome P450 enzymes |h [Elektronische Daten] |c [Xiao-Xi Li, Xiaoqian Zhang, Qing-Chuan Zheng, Yong Wang] |
| 520 | 3 | |a 4-Alkyl-substituted 1,4-dihydropyridines (DHP) exhibit inhibitory activity toward certain cytochrome P450 enzymes (P450) during their biotransformation by these enzymes, which is called mechanism-based inactivation. Though much experimental evidence had proved the essentiality of alkyl radical for P450 inactivation, the underlying mechanism of such radical formation remains elusive. In the present study, density functional calculations were employed to investigate the dealkylation mechanism of 4-alkyl-substituted DHPs mediated by P450. Interestingly, our results indicate that the initial N-H activation proceeds via a proton-coupled electron transfer process, not via the long presumed hydrogen atom transfer mechanism or the stepwise electron transfer/proton transfer one, to form the amino radical and Cpd II complex. Subsequently, homolytic C-C bond cleavage at the 4-position occurs to afford the product complex involving an alkyl radical, an aromatic pyridine derivative. This C-C cleavage step is rate determining for the whole metabolic reaction, with an energy barrier of 7.9/7.9kcal/mol on the quartet/doublet state, to which aromatization contributes as an essential intrinsic driving force. The 4-substituent groups induce differences in activation energy barriers and in the transition state structures of hydrogen abstraction process. The substrate reactivity correlates well with the stability of the generated alkyl radical as well as the C-C bond dissociation energy. Understanding the metabolic mechanism of DHP analogs is indeed essential for the related design of safer and more efficient drugs. Furthermore, our findings also enrich the mechanistic picture of amine oxidation catalyzed by P450. | |
| 540 | |a SBIC, 2015 | ||
| 690 | 7 | |a Cytochrome P450 enzyme |2 nationallicence | |
| 690 | 7 | |a Density functional calculations |2 nationallicence | |
| 690 | 7 | |a C-C bond cleavage |2 nationallicence | |
| 690 | 7 | |a Bond dissociation energy |2 nationallicence | |
| 690 | 7 | |a Proton-coupled electron transfer |2 nationallicence | |
| 700 | 1 | |a Li |D Xiao-Xi |u International Joint Research Laboratory of Nano-Micro Architecture Chemistry, State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, 130023, Changchun, People's Republic of China |4 aut | |
| 700 | 1 | |a Zhang |D Xiaoqian |u College of Physics and Electronic Engineer, Henan Normal University, 453007, Xinxiang, People's Republic of China |4 aut | |
| 700 | 1 | |a Zheng |D Qing-Chuan |u International Joint Research Laboratory of Nano-Micro Architecture Chemistry, State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, 130023, Changchun, People's Republic of China |4 aut | |
| 700 | 1 | |a Wang |D Yong |u State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, People's Republic of China |4 aut | |
| 773 | 0 | |t JBIC Journal of Biological Inorganic Chemistry |d Springer Berlin Heidelberg |g 20/4(2015-06-01), 665-673 |x 0949-8257 |q 20:4<665 |1 2015 |2 20 |o 775 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s00775-015-1252-8 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s00775-015-1252-8 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Li |D Xiao-Xi |u International Joint Research Laboratory of Nano-Micro Architecture Chemistry, State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, 130023, Changchun, People's Republic of China |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Zhang |D Xiaoqian |u College of Physics and Electronic Engineer, Henan Normal University, 453007, Xinxiang, People's Republic of China |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Zheng |D Qing-Chuan |u International Joint Research Laboratory of Nano-Micro Architecture Chemistry, State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, 130023, Changchun, People's Republic of China |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Wang |D Yong |u State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, People's Republic of China |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t JBIC Journal of Biological Inorganic Chemistry |d Springer Berlin Heidelberg |g 20/4(2015-06-01), 665-673 |x 0949-8257 |q 20:4<665 |1 2015 |2 20 |o 775 | ||