Electron Transfer Dissociation of Oligonucleotide Cations.

Electron Transfer Dissociation of Oligonucleotide Cations.
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DOI:
10.1016/j.ijms.2009.02.012
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发表时间:
2009-06-01
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:
Smith SI;Brodbelt JS

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Electron transfer dissociation (ETD) of multi-protonated 6 - 20-mer oligonucleotides and 12- and 14-mer duplexes is compared to collision activated dissociation (CAD). ETD causes efficient charge reduction of the multi-protonated oligonucleotides in addition to limited backbone cleavages to yield sequence ions of low abundance. Subsequent CAD of the charge-reduced oligonucleotides formed upon electron transfer, in a net process termed electron transfer collision activated dissociation (ETcaD), results in rich fragmentation in terms of w, a, z, and d products, with a marked decrease in the abundance of base loss ions and internal fragments. Complete sequencing was possible for nearly all oligonucleotides studied. ETcaD of an oligonucleotide duplex resulted in specific backbone cleavages, with conservation of weaker non-covalent bonds.
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