Assigning Peptide Disulfide Linkage Pattern Among Regio-Isomers via Methoxy Addition to Disulfide and Tandem Mass Spectrometry
作者:Kirt L. Durand、Lei Tan、Craig A. Stinson、Chasity B. Love-Nkansah、Xiaoxiao Ma、Yu Xia
DOI:10.1007/s13361-017-1595-1
日期:2017.6.1
Herein, we report a method based on coupling online disulfide modification and tandem massspectrometry (MS/MS) to distinguish peptide disulfide regio-isomers. Such a method relies on a new disulfide bond cleavage reaction in solution, involving methanol as a reactant and 254 nm ultraviolet (UV) irradiation. This reaction leads to selective cleavage of a disulfide bond and formation of sulfenic methyl ester