IR Study on Stacking Manner of Peptide Nanorings in Peptide Nanotubes
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概要
- 論文の詳細を見る
We here report our theoretical as well as experimental studies on the stacking manner of peptide nanorings (PNRs) in peptide nanotubes (PNTs). We focus on the molecular vibrations of N–H and C=O stretching modes and discuss this subject via their infrared (IR) spectroscopy, because PNTs are formed by the inter-ring H bonds between the adjacent PNRs via –N–H$\cdots$O=C–. Symmetry analysis based on group theory reveals that parallel stacking causes two IR active modes in these molecular vibrations while three modes are active in the antiparallel stacking. This difference in the number of IR active modes is determined only by the stacking manner and not by the number of amino acid residues composing the PNRs. By using two typical PNRs of cyclo[–(l-Gln–d-Ala)3] and cyclo[–(l-Gln–d-Ala)4], we further studied the favorable stacking manners of PNRs via IR observation. Our IR experiments as well as the ab initio energetics show that the former PNRs create a PNT by stacking themselves in parallel while the latter PNRs do so by stacking themselves in an antiparallel manner.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-10-15
著者
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Usui Kenji
Department Of Bioengineering Tokyo Institute Of Technology
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Mihara Hisakazu
Department Of Applied Chemistry Faculty Of Engineering Nagasaki University
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Nagai Yukiko
Department Of Materials Science And Engineering Waseda University
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Okamoto Hajime
Department Of Materials Science And Engineering Waseda University
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Furukawa Yukio
Department Of Chemistry And Biochemistry School Of Advanced Science And Engineering Waseda Universit
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Nakanishi Tsutomu
Department Of Materials Sciences Waseda Universit
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Takeda Kyozaburo
Department of Materials Science and Engineering, Waseda University, Tokyo 169-8555, Japan
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Takeda Kyozaburo
Department of Electrical Engineering and Bioscience, Graduate School of Advanced Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, Japan
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Usui Kenji
Department of Bioengineering, Tokyo Institute of Technology, Yokohama 226-8501, Japan
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Furukawa Yukio
Department of Chemistry, Waseda University, Tokyo 169-8555, Japan
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Nakanishi Tsutomu
Department of Materials Science and Engineering, Waseda University, Tokyo 169-8555, Japan
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