Comparison of Glycopeptide Fragmentation by Collision Induced Dissociation and Ultraviolet Photodissociation.

Comparison of Glycopeptide Fragmentation by Collision Induced Dissociation and Ultraviolet Photodissociation.
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DOI:
10.1016/j.ijms.2014.07.032
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发表时间:
2015-02-01
影响因子:
1.8
通讯作者:
Brodbelt JS
Brodbelt JS
中科院分区:
化学4区
文献类型:
--
作者:
Ko BJ;Brodbelt JS

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比较了碰撞诱导解离(CID)和193nm紫外光解离(UVPD)在线性离子阱中获得的胎儿蛋白和κ-酪蛋白的质子化和去质子化o -链糖肽的断裂途径。采用非特异性pronase酶切、两性离子亲水相互作用液相色谱(ZIC-HILIC)固相萃取(SPE)富集和纳米液相色谱(nano-LC)技术。去质子化糖肽的UVPD通常产生最多的片段离子阵列,从而提供关于糖肽结构和肽序列的最多诊断信息。此外,UVPD产生了独特的片段离子,如脯氨酸n端裂解产生的y型离子。质子化糖肽的CID和UVPD仅由糖肽裂解产生片段离子。
A comparison of the fragmentation pathways of both protonated and deprotonated O-linked glycopeptides from fetuin and κ-casein obtained upon collision induced dissociation (CID) and 193 nm ultraviolet photodissociation (UVPD) in a linear ion trap is presented. A strategy using non-specific pronase digestion, zwitterionic hydrophilic interaction liquid chromatography (ZIC-HILIC) solid phase extraction (SPE) enrichment, and nano-liquid chromatography (nano-LC) is employed. UVPD of deprotonated glycopeptides generally produced the greatest array of fragment ions, thus affording the most diagnostic information about both glycan structure and peptide sequence. In addition, UVPD generated unique fragment ion such as Y-type ions arising from cleavage at the N-terminus of proline. CID and UVPD of protonated glycopeptides produced fragment ions solely from glycan cleavages.
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