Development of novel guanidino-labelling derivatisation (GLaD) reagents for liquid chromatography/matrix-assisted laser desorption/ionisation analysis.

Development of novel guanidino-labelling derivatisation (GLaD) reagents for liquid chromatography/matrix-assisted laser desorption/ionisation analysis.
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开发用于液相色谱/基质辅助激光解吸/电离分析的新型胍基标记衍生化 (GLaD) 试剂。

DOI:
10.1002/rcm.3176
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发表时间:
2007
期刊:
RCM
影响因子:
--
通讯作者:
Brancia FL
Brancia FL
中科院分区:
--
文献类型:
--
作者:
Brancia FL

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开发了新一代胍基标记(GLaD)试剂,用于使用离线微毛细管液相色谱(LC)基质辅助激光解吸/电离质谱(MALDI-MS)进行定量蛋白质组学。为了减少两种不同标记的肽离子的同位素包膜之间不必要的重叠,描述了一种新的合成路线,用于生产N,O-二甲基异脲的含13 C-和15 N-的同位素异构体。在离线微孔反相LC期间,使用这些类型的同位素对两种差异标记肽的保留时间没有有害影响。此外,在源后衰变分析期间,可以利用掺入4 Da质量差的可能性来生成产物离子谱,其中含有修饰的碎片离子在相应的产物离子谱中显示为双峰,从而便于鉴定C末端碎片离子。版权所有© 2007约翰威利父子有限公司。
A new generation of guanidino‐labelling (GLaD) reagents were developed for quantitative proteomics using offline microcapillary liquid chromatography (LC) matrix‐assisted laser desorption/ionisation mass spectrometry (MALDI‐MS). In order to reduce the unwanted overlapping between the isotopic envelopes of the two differentially labelled peptide ions, a novel synthetic route was described for production of both13C‐ and15N‐containing isotopomers ofN,O‐dimethylisourea. The use of these types of isotopes has no deleterious effect on the retention times of both differentially labelled peptides during offline microbore reversed‐phase LC. In addition, the possibility to incorporate a mass difference of 4 Da can be exploited during post‐source decay analysis to generate product ion spectra in which fragment ions containing the modifications appear as doublets in the corresponding product ion spectra, thus facilitating identification of the C‐terminal fragment ions. Copyright © 2007 John Wiley & Sons, Ltd.
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