文献类型：期刊文献

英文题名：Unexpectedly super strong paramagnetism of aromatic peptides due to cations of divalent metals

作者：Yang, Haijun[1,2]; Mu, Liuhua[2,9]; Zhang, Lei[3]; Wang, Zixin[4]; Sheng, Shiqi[5]; Song, Yongshun[5]; Xiu, Peng[6]; Wang, Jihong[5]; Shi, Guosheng[7]; Hu, Jun[1,2]; Zhang, Xin[3]; Zhang, Feng[4,8]; Fang, Haiping[1,5]

机构：[1] Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, SSRF, ZJLab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China; [2] Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; [3] High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, China; [4] State Key Laboratory of Respiratory Disease, Guangzhou Institute of Oral Disease, Stomatology Hospital, Department of Biomedical Engineering, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, 511436, China; [5] School of Science, East China University of Science and Technology, Shanghai, 200237, China; [6] Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China; [7] Shanghai Applied Radiation Institute, Shanghai University, Shanghai, 200444, China; [8] Biomedical Nanocenter, School of Life Science, Inner Mongolia Agricultural University, 29 East Erdos Street, Hohhot, 010011, China; [9] University of Chinese Academy of Sciences, Beijing, 100049, China

年份：2020

外文期刊名：arXiv

收录：EI(收录号：20210001226)

语种：英文

外文关键词：Aromatic compounds - Aromatization - Biomolecules - Chlorine compounds - Magnetic field effects - Magnetic moments - Magnetic susceptibility - Paramagnetism - Peptides

摘要：The magnetism of most biomolecules has not been characterized, which impedes our understanding of some magnetic field-related phenomena, including magnetoreception and magnetic effects on biological systems. Here we measured the magnetic susceptibility of an aromatic peptide in the presence or absence of divalent metal cations in liquid phase at room temperature, which is very close to the physiological conditions in many living organisms. Unexpectedly, the AYFFF self-assemblies in the chloride solution of various divalent cations (Mg2+, Zn2+, and Cu2+) display super strong paramagnetism, indicating the possible existence of ferromagnetism in living organism. We attribute the observation to the rich aromatic rings in the AYFFF assemblies, on which the cations adsorb via cation–π interactions, display non-divalent behavior and thus possess magnetic moments. The findings not only provide fundamental information for understanding the magnetism of biomolecules, provoke insights for investigating the origin of magnetoreception and bio-effects of magnetic field, but also help developing future magnetic control techniques on aromatic ring-enriched biomolecules and drugs, including their aggregation, dynamics and reactions, in living organisms. ? 2020, CC-BY.