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. 2021 Jul 26;8:686086. doi: 10.3389/fmolb.2021.686086

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Copyright © 2021 Chiki, Zhang, Rajasekhar, Abriata, Rostami, Krapp, Boudeffa, Dal Peraro and Lashuel.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Distance distribution of atom pairs in Nt19 with different PTMs. (A) Distance between Cα of M1 and Cα of T3 was lower in pT3 and oxM8/pT3 than in WT. (B) The distance between Cα of L4 and K9 was lowered in oxM8/AcK6 compared to WT and AcK6 due to the bend at M8. (C) A peak below 4 Å was shown in the distribution of the distance between hydrogens of NH₃ ⁺ and oxygens of the pT3 phosphate group, indicating pT3 might promote ionic interaction at this N-terminal end. (D) The distance between the sulfur atom of M8 and the center of the F11 aromatic ring increased in peptides with M8 oxidation, indicating the stabilization by the interaction of sulfur and the aromatic ring was weakened.