title: Letter: Electron-capture dissociation and collision-induced dissociation fragmentation of the supermetallized complexes of Substance P with potassium, cesium and silver.
abstract: We report the investigation of the collision-induced dissociation (CID) and electron-capture dissociation (ECD) product fragmentations of the supermetallized complexes of Substance P and several monovalent metals. The supermetallization is the phenomenon of the formation of the complex ion peptide-metals in the gas phase when the peptide accepts an unexpectedly large number of metals. We have obtained and investigated complexes with the incorporation of up to four cesium (Cs), up to five potassium (K) and up to six silver (Ag) atoms. The current research reveals crucial changes in the complex behavior in the cases of different metals. It was observed that in CID spectra of complexes with Cs and K is dominated by the peak corresponding to the loss of metal cation while ECD gives a rich fragmentation. In the case of complexes with Ag, the loss of Ag(+) occurs in ECD while the CID shows a good fragmentation.
authors.affiliation: Skolkovo Institute of Science and Technology Novaya St., 100, Skolkovo 143025 Russian Federation. Institute for Energy Problems of Chemical Physics Russian Academy of Sciences Leninskij pr. 38 k.2, 119334 Moscow, Russian Federation. Emanuel Institute for Biochemical Physics Russian Academy of Sciences Kosygina st. 4, 119334 Moscow, Russian Federation. Moscow Institute of Physics and Technology, 141700 Dolgoprudnyi, Moscow Region, Russian Federation.. yura542@gmail.com.
authors.forename: Yury
authors.initials: Y
authors.lastname: Kostyukevich
authors.affiliation: Skolkovo Institute of Science and Technology Novaya St., 100, Skolkovo 143025 Russian Federation. Institute for Energy Problems of Chemical Physics Russian Academy of Sciences Leninskij pr. 38 k.2, 119334 Moscow, Russian Federation. Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory 1-3, 119991 Moscow, Russian Federation.. zherebker@gmail.com.
authors.forename: Alexander
authors.initials: A
authors.lastname: Zherebker
authors.affiliation: Institute for Energy Problems of Chemical Physics Russian Academy of Sciences Leninskij pr. 38 k.2, 119334 Moscow, Russian Federation. Moscow Institute of Physics and Technology, 141700 Dolgoprudnyi, Moscow Region, Russian Federation. konoleha@yandex.ru.
authors.forename: Alexey
authors.initials: A
authors.lastname: Kononikhin
authors.affiliation: Institute for Energy Problems of Chemical Physics Russian Academy of Sciences Leninskij pr. 38 k.2, 119334 Moscow, Russian Federation. Emanuel Institute for Biochemical Physics Russian Academy of Sciences Kosygina st. 4, 119334 Moscow, Russian Federation. Moscow Institute of Physics and Technology, 141700 Dolgoprudnyi, Moscow Region, Russian Federation. mariind@yandex.ru.
authors.forename: Maria
authors.initials: M
authors.lastname: Indeykina
authors.affiliation: Emanuel Institute for Biochemical Physics Russian Academy of Sciences Kosygina st. 4, 119334 Moscow, Russian Federation. Moscow Institute of Physics and Technology, 141700 Dolgoprudnyi, Moscow Region, Russian Federation. hexapole@gmail.com.
authors.forename: Igor
authors.initials: I
authors.lastname: Popov
authors.affiliation: Skolkovo Institute of Science and Technology Novaya St., 100, Skolkovo 143025 Russian Federation. Institute for Energy Problems of Chemical Physics Russian Academy of Sciences Leninskij pr. 38 k.2, 119334 Moscow, Russian Federation. Emanuel Institute for Biochemical Physics Russian Academy of Sciences Kosygina st. 4, 119334 Moscow, Russian Federation. Moscow Institute of Physics and Technology, 141700 Dolgoprudnyi, Moscow Region, Russian Federation.. ennikolaev@rambler.ru.
authors.forename: Eugene
authors.initials: E
authors.lastname: Nikolaev
mesh_terms: D002586:Cesium; D004583:Electrons; D011188:Potassium; D012834:Silver; D013373:Substance P
chemical_list: D002586:Cesium; D013373:Substance P; D012834:Silver; D011188:Potassium