Lysine peroxycarbamates: Free radical-promoted peptide cleavage

被引：82

作者：

Masterson, DS ^{[1
]}

Yin, HY ^{[1
]}

Chacon, A ^{[1
]}

Hachey, DL ^{[1
]}

Norris, JL ^{[1
]}

Porter, NA ^{[1
]}

机构：

[1] Vanderbilt Univ, Dept Chem, Nashville, TN 37235 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 03期

关键词：

D O I：

10.1021/ja038615u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Strategies are reported that combine in one step a predictable chemical-based protein digestion with mass spectrometry. Lysine residue amino groups in peptides and proteins are modified by reaction with a peroxycarbonate derived from p-nitrophenol, and tert-butyl hydroperoxide. The peroxycarbonate reacts with lysine residues in peptides and proteins, and the resulting lysine peroxycarbamates undergo homolytic fragmentation under conditions of low-energy collision-induced dissociation (CID). Observed fragmentation of the peptides involves apparent free radical processes including Hofmann-Löffler-type rearrangements that lead to peptide chain fragmentation. Strategies for directed cleavage of peptides by free radical promoted processes are feasible, and such strategies may well simplify schemes for protein analysis. Copyright © 2004 American Chemical Society.

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页码：720 / 721

页数：2

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