Attempting to rewrite History: Challenges with the analysis of histidine-phosphorylated peptides

M.-B. Gonzalez-Sanchez, F. Lanucara, M. Helm, C.E. Eyers

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

A significant number of proteins in both eukaryotes and prokaryotes are known to be post-translationally modified by the addition of phosphate, serving as a means of rapidly regulating protein function. Phosphorylation of the amino acids serine, threonine and tyrosine are the focus of the vast majority of studies aimed at elucidating the extent and roles of such modification, yet other amino acids, including histidine and aspartate, are also phosphorylated. Although histidine phosphorylation is known to play extensive roles in signalling in eukaryotes, plants and fungi, roles for phosphohistidine are poorly defined in higher eukaryotes. Characterization of histidine phosphorylation aimed at elucidating such information is problematic due to the acid-labile nature of the phosphoramidate bond, essential for many of its biological functions. Although MSbased strategies have proven extremely useful in the analysis of other types of phosphorylated peptides, the chromatographic procedures essential for such approaches promote rapid hydrolysis of phosphohistidinecontaining peptides. Phosphate transfer to non-biologically relevant aspartate residues during MS analysis further complicates the scenario.
Original languageEnglish
Pages (from-to)1089-1095
Number of pages7
JournalBiochemical society transactions
Volume41
Issue number4
DOIs
Publication statusPublished - 01 Aug 2013

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