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Ab initio computational study of reaction mechanism of peptide bond formation on HF/6-31G(d,p) level

机译:AB Initio肽键形成反应机制对HF / 6-31G(D,P)水平的反应机理的计算研究

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Peptide plays an important role in modulation of various cell functions. Therefore, formation reaction of the peptide is important for chemical reactions. One way to probe the reaction of peptide synthesis is a computational method. The purpose of this research is to determine the reaction mechanism for peptide bond formation on Ac-PV-NH2 and Ac-VP-NH2 synthesis from amino acid proline and valine by ab initio computational approach. The calculations were carried out by theory and basis set HF/6-3 lG(d,p) for four mechanisms (path 1 to 4) that proposed in this research. The results show that the highest of the rate determining step between reactant and transition state (TS) for path 1, 2, 3, and 4 are 163.06 kJ.mol~(-1), 1868 kJ.mol~(-1), 5685 kJ.mol~(-1), and 1837 kJ.mol~(-1). The calculation shows that the most preferred reaction of Ac-PV-NH2 and Ac-VP-NH2 synthesis from amino acid proline and valine are on the path 1 (initiated with the termination of H~+ in proline amino acid) that produce Ac-PV-NH2.
机译:肽在调制各种细胞功能时起着重要作用。因此,肽的形成反应对于化学反应很重要。探测肽合成反应的一种方法是计算方法。该研究的目的是确定AB Initio计算方法对氨基酸脯氨酸和缬氨酸的AC-PV-NH2和AC-VP-NH2合成的肽键形成的反应机制。根据本研究提出的四种机制(路径1至4),通过理论和基础设定的基础和基础设定的计算结果来进行.PF / 6-3 LG(D,P)。结果表明,用于路径1,2,3和4的反应物和过渡状态(TS)之间的最高速率确定步骤为163.06kJ.mol〜(-1),1868kJ.mol〜(-1), 5685 kj.mol〜(-1)和1837 kj.mol〜(-1)。该计算表明,AC-PV-NH2和AC-VP-NH2合成来自氨基酸脯氨酸和缬氨酸的最优选反应在路径1上(在脯氨酸氨基酸中的终止中引发)产生AC- PV-NH2。

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