Synthesis and evaluation of dihydro-[1,2,4]triazolo[4,3-a]pyridin-2-ium carboxylates as fixed charge fluorescent derivatization reagents for MEKC and MS proteomic analyses

Joanna Fedorowicz, Marek Cebrat, Magdalena Wierzbicka, Paulina Wiśniewska, Aleksandra Jalińska, Szymon Dziomba, Maria Gdaniec, Mariusz Jaremko, Lukasz Jaremko, Kousik Chandra, Zbigniew Szewczuk, Jarosław Sączewski

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3 Scopus citations

Abstract

Proteinogenic amino acids were derivatized via coupling reactions with N-hydroxysuccinimide esters of Safirinium dyes. The obtained compounds were fully characterized by 1H and 13C NMR, IR, and ESI-MS spectral techniques. Elemental analysis, as well as the crystal structure analysis of exemplary compounds, were performed. The absorption and fluorescent properties of the obtained derivatives have been systematically investigated. The optical properties and very good water solubility allowed for the development of a simple method for the determination of exemplary amino acids by means of micellar electrokinetic chromatography. Moreover, a new class of fluorescent peptide building blocks comprising a spiro-conjugated Safirinium-proline system was obtained. Due to the presence of a permanent positive charge, Safirinium-amino acid dervatives are potential candidates for signal enhancers in MS proteomic analysis. The applicability of the examined ionization tags in signal enhancement and peptide sequencing was proved. The obtained results provide an experimental basis for the development of a new approach for trace amino acids, peptides, and proteins detection by means of absorption, fluorescence, and mass spectrometry.
Original languageEnglish (US)
Pages (from-to)128426
JournalJournal of Molecular Structure
Volume1217
DOIs
StatePublished - May 14 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the Polish Ministry of Science and Higher Education (research grant IP2012 055472), KNOW programme and Medical University of Gdańsk subsidies [research grant number 01-0302/08/509], as well as by Wrocław Centre of Biotechnology and programme The Leading National Research Centre (KNOW) for years 2014-2018.

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