Unique Fragmentation of Singly Charged DEST Cross-Linked Peptides

Unique Fragmentation of Singly Charged DEST Cross-Linked Peptides
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单电荷 DEST 交联肽的独特断裂

DOI:
10.1007/s13361-012-0372-4
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发表时间:
2012
影响因子:
3.2
通讯作者:
J. Reilly
J. Reilly
中科院分区:
化学3区
文献类型:
--
作者:
Yi He;M. Lauber;J. Reilly

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先前已经表明,当交联剂辛二硫代亚胺酸二乙酯(DEST)与蛋白质的伯胺反应以产生脒化残基时,伯胺保持其高碱性,并且交联物质可以通过强阳离子交换而富集。现在证明,单电荷DEST交联肽离子的碰撞激活会导致交联位点的优先切割。所得产物离子促进交联肽的检测和鉴定。
It has previously been shown that when cross-linking reagent diethyl suberthioimidate (DEST) reacts with primary amines of proteins to yield amidinated residues, the primary amines retain their high basicity, and cross-linked species can be enriched by strong cation exchange. It is now demonstrated that collisional activation of singly-charged DEST cross-linked peptide ions leads to preferential cleavage at the cross-linked sites. The resulting product ions facilitate the detection and identification of cross-linked peptides.
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