Suppr超能文献

多肽酰胺I振动中的分子间相互作用效应

Intermolecular interaction effects in the amide I vibrations of polypeptides.

作者信息

Krimm S, Abe Y

出版信息

Proc Natl Acad Sci U S A. 1972 Oct;69(10):2788-92. doi: 10.1073/pnas.69.10.2788.

Abstract

Previous perturbation treatments of the Amide I vibrations of beta polypeptides are inconsistent with a detailed normal coordinate analysis of crystalline polyglycine I. This analysis indicates that the D(10) interaction constant is essentially zero, rather than the large value (about 20 cm(-1)) required by the earlier application of the perturbation theory. It is suggested that the previously neglected D(11) term should be included in the perturbation expression, and it is shown that the physical origin of such a term can be accounted for by transition dipole coupling. This mechanism is shown to give a reasonable explanation of splittings of the C=O stretching vibrations in hydrogenbonded carboxylic acid dimers. Its application to beta polypeptides provides a satisfactory interpretation of splittings in the Amide I modes.

摘要

先前对β多肽酰胺I振动的微扰处理与结晶聚甘氨酸I的详细简正坐标分析不一致。该分析表明,D(10)相互作用常数基本为零,而不是早期微扰理论应用所要求的较大值(约20 cm⁻¹)。有人建议,微扰表达式中应包含先前被忽略的D(11)项,并且表明该项的物理起源可以用跃迁偶极耦合来解释。这种机制被证明可以合理解释氢键合羧酸二聚体中C=O伸缩振动的分裂。将其应用于β多肽可以对酰胺I模式中的分裂给出令人满意的解释。

相似文献

3
Anharmonicity of amide modes.酰胺模式的非谐性。
J Phys Chem B. 2006 Mar 2;110(8):3798-807. doi: 10.1021/jp0530092.
4
Transition dipole coupling in Amide I modes of betapolypeptides.β-多肽酰胺I模式中的跃迁偶极耦合
Proc Natl Acad Sci U S A. 1975 Dec;72(12):4933-5. doi: 10.1073/pnas.72.12.4933.
8
Understanding the Amide-II Vibrations in β-Peptides.了解β-肽中的酰胺II振动。
J Phys Chem B. 2015 Nov 25;119(47):14831-9. doi: 10.1021/acs.jpcb.5b08070. Epub 2015 Nov 12.

引用本文的文献

5
Inconsistent hydrogen bond-mediated vibrational coupling of amide I.酰胺I中氢键介导的振动耦合不一致。
RSC Adv. 2023 Jan 5;13(2):1295-1300. doi: 10.1039/d2ra07177k. eCollection 2023 Jan 3.
7
Ion-Triggered Hydrogels Self-Assembled from Statistical Copolypeptides.离子触发的嵌段共聚物水凝胶自组装。
ACS Macro Lett. 2022 Mar 15;11(3):323-328. doi: 10.1021/acsmacrolett.1c00774. Epub 2022 Feb 16.

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验