The role of copper in cysteine oxidation: study of intra- and inter-molecular reactions in mass spectrometry

文献情報

出版日 2008-12-24
DOI 10.1039/B817061D
インパクトファクター 0
著者

Michel Prudent, Hubert H. Girault



要旨

Cysteine-containing peptide oxidation was studied both by using an inert platinum electrode and a sacrificial electrode (copper or zinc) generating metallic ions in electrospray ionization mass spectrometry (ESI-MS). Using peptides containing one, two and three cysteines, we have compared the different chemical and electrochemical oxidation pathways of cysteine (RS−IIH) to cystine (RS−IS−IR) and to sulfenic, sulfinic and sulfonic acid (RS0OH, RSIIO2H and RSIVO3H, respectively). In the absence of copper ions, intra-molecular reactions were the most abundant, whereas inter-molecular reactions were found to be enhanced by the presence of copper ions. These cations favor the formation of 2 : 1 (peptide : copper) complexes compared to 1 : 1 complexes, thus enhancing the formation of inter-molecular bridges. This study highlights the importance of the position of cysteine inside a peptide during disulfide bridge formation.

掲載誌

Metallomics

Metallomics
CiteScore: 7
自己引用率: 6.9%
年間論文数: 77

Metallomics publishes cutting-edge investigations aimed at elucidating the identification, distribution, dynamics, role and impact of metals and metalloids in biological systems. Studies that address the “what, where, when, how and why” of these inorganic elements in cells, tissues, organisms, and various environmental niches are welcome, especially those employing multidisciplinary approaches drawn from the analytical, bioinorganic, medicinal, environmental, biophysical, cell biology, plant biology and chemical biology communities. We are particularly interested in articles that enhance our chemical and/or physical understanding of the molecular mechanisms of metal-dependent life processes, and those that probe the common space between metallomics and other ‘omics approaches to uncover new insights into biological processes. Metallomics seeks to position itself at the forefront of those advances in analytical chemistry destined to clarify the enormous complexity of biological systems. As such, we particularly welcome those papers that outline cutting-edge analytical technologies, e.g., in the development and application of powerful new imaging, spectroscopic and mass spectrometric modalities. Work that describes new insights into metal speciation, trafficking and dynamics in complex systems or as a function of microenvironment are also strongly encouraged. Studies that examine the interconnectivity of metal-dependent processes with systems level responses relevant to organismal health or disease are also strongly encouraged, for example those that probe the effect of chemical exposure on metal homeostasis or the impact of metal-based drugs on cellular processes.

おすすめサプライヤー

中国enthusiasizehaoゴム化成品قو業有限公司
中国青島玉洲化工有限公司(山东萊西)
中国デジ某种程度天グループ
GRYF HB spol. s.r.o
中国宁波市震雷化学有限公司
中国广州木森薬業有限公司
オーストリアTrenka Industriebedarf Handelsgesellschaft m.b.H
ドイツマシン · メッシャー
中国Jiangsu Ruijia Jidu Shibei Zhi Gongsi
スイスW.Kolb AG博士
免責事項
このページに表示される学術雑誌情報は、参考および研究目的のみを目的としています。当社は雑誌出版社とは提携しておらず、投稿の取り扱いも行っておりません。出版に関するお問い合わせは、各雑誌出版社に直接ご連絡ください。
表示されている情報に誤りがある場合は、[email protected] までご連絡ください。迅速に確認し、対応いたします。