1-(3-Aminopropyl)-3-butylimidazolium bromide for carboxyl group derivatization: potential applications in high sensitivity peptide identification by mass spectrometry
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- 作者：XiaoQiang Qiao (14446) (24446)
Yuan Zhou (14446)
ChunYan Hou (14446)
XiaoDan Zhang (14446)
KaiGuang Yang (14446)
LiHua Zhang (14446)
YuKui Zhang (14446) - 关键词：1 ; (3 ; aminopropyl) ; 3 ; butylimidazolium bromide ; ionization capacity ; peptide ; mass spectrometry analysis ; derivatization
- 刊名：Science China Life Sciences
- 出版年：2013
- 出版时间：March 2013
- 年：2013
- 卷：56
- 期：3
- 页码：240-245
- 全文大小：570KB
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Yuan Zhou (14446)
ChunYan Hou (14446)
XiaoDan Zhang (14446)
KaiGuang Yang (14446)
LiHua Zhang (14446)
YuKui Zhang (14446)
14446. Key Laboratory of Separation Science for Analytical Chemistry, National Chromatographic Research & Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
24446. Key Laboratory of Pharmaceutical Quality Control of Hebei Province & College of Pharmaceutical Sciences, Hebei University, Baoding, 071002, China
文摘
The cationic reagent 1-(3-aminopropyl)-3-butylimidazolium bromide (BAPI) was exploited for the derivatization of carboxyl groups on peptides. Nearly 100% derivatization efficiency was achieved with the synthetic peptide RVYVHPI (RI-7). Furthermore, the peptide derivative was stable in a 0.1% TFA/water solution or a 0.1% (v/v) TFA/acetonitrile/water solution for at least one week. The effect of BAPI derivatization on the ionization of the peptide RI-7 was further investigated, and the detection sensitivity was improved >42-fold via matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), thus outperforming the commercial piperazine derivatization approach. Moreover, the charge states of the peptide were largely increased via BAPI derivatization by electrospray ionization (ESI) MS. The results indicate the potential merits of BAPI derivatization for high sensitivity peptide analysis by MS.