首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Modeling Competitive Interactions in Proteins:Vibrational Spectroscopy of M~+(n-methylacetamide)1(H2O)_(n=0-3),M=Na and K,in the 3 mu m Region
【24h】

Modeling Competitive Interactions in Proteins:Vibrational Spectroscopy of M~+(n-methylacetamide)1(H2O)_(n=0-3),M=Na and K,in the 3 mu m Region

机译:模拟蛋白质中的竞争相互作用:3μm区域中的M〜+(n-甲基乙酰胺)1(H2O)_(n = 0-3),M = Na和K的振动光谱

获取原文
获取原文并翻译 | 示例
           

摘要

To properly understand the preferred structures and biological properties of proteins,it is important to understand how they are influenced by their immediate environment.Competitive intrapeptide,peptide…water,ion-water,and ion…peptide interactions,such as hydrogen bonding,play a key role in determining the structures,properties,and functionality of proteins.The primary types of hydrogen bonding involving proteins are intramolecular amide-amide(N-H…O=C)and intermolecular amide-water(O-H…O=C and H-O…H-N).n-Methylacetamide(NMA)is a convenient model for investigating these competitive interactions.An analysis of the IR photodissociation(IRPD)spectra of M~+(n-methylacetamide)1(H2O)_(n=0-3)(M=Na and K)in the O…H and N-H spectral regions is presented.Ab initio calculations(MP2/cc-pVDZ)are used as a guide in identifying both the type and location of hydrogen bonds present.In larger clusters,where several structural isomers may be present in the molecular beam,ab initio calculations are also used to suggest assignments for the observed spectral features.The results presented offer insight to the nature of ion…NMA interactions in an aqueous environment and reveal how different ion…ligand pairwise interactions direct the extent of water-water and water…NMA hydrogen bonding observed.
机译:为了正确理解蛋白质的优选结构和生物学特性,重要的是要了解它们如何受到其直接环境的影响。竞争性肽,肽……水,离子水和离子……肽的相互作用(例如氢键)起着重要的作用。在决定蛋白质的结构,性质和功能方面起着关键作用。涉及蛋白质的氢键作用的主要类型是分子内酰胺-酰胺(NH…O = C)和分子间酰胺水(OH…O = C和HO…HN) n-甲基乙酰胺(NMA)是研究这些竞争相互作用的便捷模型.M〜+(n-甲基乙酰胺)1(H2O)_(n = 0-3)(M)的红外光解离(IRPD)光谱分析给出了O…H和NH光谱区域中的Na和K。从头算(MP2 / cc-pVDZ)可以作为识别存在的氢键类型和位置的指南。在较大的簇中,有几个分子束中可能存在结构异构体,从头算也是sed建议对观察到的光谱特征进行指配。所提供的结果提供了对离子…NMA相互作用在水环境中的性质的了解,并揭示了不同的离子…配体对相互作用如何指导水-水和水的程度…观察到的NMA氢键。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号