Impact of Amidination on Peptide Fragmentation and Identification in Shotgun Proteomics.
Impact of Amidination on Peptide Fragmentation and Identification in Shotgun Proteomics.
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DOI:
10.1021/acs.jproteome.6b00468
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发表时间:
2016-10-07
影响因子:
4.4
通讯作者:
Reilly JP
中科院分区:
文献类型:
--
作者:
Li S;Dabir A;Misal SA;Tang H;Radivojac P;Reilly JP
Peptide amidination labeling using S-methyl thioacetimidate (SMTA) is investigated in an attempt to increase the number and types of peptides that can be detected in a bottom-up proteomics experiment. This derivatization method affects the basicity of lysine residues, and is shown here to significantly impact the idiosyncracies of peptide fragmentation and peptide detectability. The unique and highly reproducible fragmentation properties of SMTA-labeled peptides, such as the strong propensity for forming b1 fragment ions, can be further exploited to modify the scoring of peptide-spectrum pairs and improve peptide identification. To this end, we have developed a supervised post-processing algorithm to exploit these characteristics of peptides labeled by SMTA. Our experiments show that, although the overall number of identifications are similar, the SMTA modification enabled the detection of 16-26% peptides not previously observed in comparable CID/HCD tandem mass spectrometry experiments without SMTA labeling.
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影响因子:
4.4
作者:
Beardsley, RL;Reilly, JP
通讯作者:
Reilly, JP
影响因子:
4.4
作者:
Klammer, AA;MacCoss, MJ
通讯作者:
MacCoss, MJ
影响因子:
4.4
作者:
Li, Yong Fuga;Arnold, Randy J.;Radivojac, Predrag
通讯作者:
Radivojac, Predrag
影响因子:
4.4
作者:
Choudhary, G;Wu, SL;Hancock, WS
通讯作者:
Hancock, WS
DOI:
10.1073/pnas.78.6.3824
发表时间:
1981-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
HOPP, TP;WOODS, KR
通讯作者:
WOODS, KR