Letter: Electron-capture dissociation and collision-induced dissociation fragmentation of the supermetallized complexes of Substance P with potassium, cesium and silver

作者：Kostyukevich Yury; Zherebker Alexander; Kononikhin Alexey; Indeykina Maria; Popov Igor; Nikolaev Eugene

来源：European Journal of Mass Spectrometry, 2016, 22(2): 91-95.

DOI：10.1255/ejms.1411

• metal ions
• metal-peptide complexes
• mass spectrometry
• ESI
• FT-ICR

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.

• 出版日期2016