2020
DOI: 10.1007/s00894-020-04564-5
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Molecular modeling and computational study of the chiral-dependent structures and properties of the self-assembling diphenylalanine peptide nanotubes, containing water molecules

Abstract: DFT (VASP) and semi-empirical (HyperChem) calculations for the L-and D-chiral diphenylalanine (L-FF and D-FF) nanotube (PNT) structures, empty and filled with water/ice clusters, are presented and analyzed. The results obtained show that after optimization, the dipole moment and polarization of both chiral type L-FF and D-FF PNT and embedded water/ice cluster are enhanced; the water/ice cluster acquire the helix-like structure similar as L-FF and D-FF PNT. Ferroelectric properties of tubular water/ice helix-l… Show more

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Cited by 7 publications
(10 citation statements)
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“…In addition, the water content of the film might induce an additional electrochemical response of films as ions can migrate in a wet state, especially in the low-frequency region, which can lead to the stronger electrical signals. We also found the porphyrin-incorporated FF-based PENGs generated significant output voltages and current densities while the pure FF-based PENG produced negligible noise level output performance after immersion in a PBS solution for >5 min , (Figure S15). The output voltage and current density ratios compared to the initial performance of 0, 1, 2, and 3 mM THPP-incorporated FF based PENGs after immersion for 15 min are 0%, 48%, 63%, and 88% and 0%, 23%, 37%, and 59%, respectively.…”
Section: Resultsmentioning
confidence: 99%
“…In addition, the water content of the film might induce an additional electrochemical response of films as ions can migrate in a wet state, especially in the low-frequency region, which can lead to the stronger electrical signals. We also found the porphyrin-incorporated FF-based PENGs generated significant output voltages and current densities while the pure FF-based PENG produced negligible noise level output performance after immersion in a PBS solution for >5 min , (Figure S15). The output voltage and current density ratios compared to the initial performance of 0, 1, 2, and 3 mM THPP-incorporated FF based PENGs after immersion for 15 min are 0%, 48%, 63%, and 88% and 0%, 23%, 37%, and 59%, respectively.…”
Section: Resultsmentioning
confidence: 99%
“…При Таким образом, имея мономеры различной исходной хиральности при одинаковых внешних воздействиях в процессе самоборки методом МД-манипулярота с определённой и достаточно большой долей вероятности мы получаем спиральные нанотрубки соответствующей хиральности: правые из L-мономеров и левые из Dмономеров. Эти результаты аналогичны также самоорганизации и смене знака хиральности при самосбрке пептидных нанотрубок на основе дифенилаланинов с разной хиральностью [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Таким образом, полученные результаты соответствует общим процессам усложнения структур при самоорганизации биомакромолекул и закону чередования знака хиральности при переходе на более высокий иерархический уровень их структурной организации [9][10][11].…”
Section: анализ и обсуждение результатовunclassified
“…В качестве примера для демонстрации процесса самоорганизации и самосборки сложных биомолекулярных структур рассмотрено формирование спиральной структуры типа нанотрубки на основе фенилаланиновой аминокислоты (F или Phe) [2], которая образует дипептиды (FF или (Phe)2) [17], из которых легко собираются пептидные нанотрубки [18][19][20][21][22][23][24][25][26][27][28][29][30][31].…”
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