Improved sequence tag generation method for peptide identification in tandem mass spectrometry.
Improved sequence tag generation method for peptide identification in tandem mass spectrometry.
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DOI:
10.1021/pr800400q
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发表时间:
2008-10
影响因子:
4.4
通讯作者:
Nesvizhskii, Alexey I.
中科院分区:
文献类型:
--
作者:
Cao, Xia;Nesvizhskii, Alexey I.
关键词:
The sequence tag-based peptide identification methods are a promising alternative to the traditional database search approach. However, a more comprehensive analysis, optimization, and comparison with established methods are necessary before these methods can gain widespread use in the proteomics community. Using the InsPecT open source code base (Tanner et al., Anal Chem. 2005, 77:4626–39), we present an improved sequence tag generation method that directly incorporates multi-charged fragment ion peaks present in many tandem mass spectra of higher charge states. We also investigate the performance of sequence tagging under different settings using control datasets generated on five different types of mass spectrometers, as well as using a complex phosphopeptide-enriched sample. We also demonstrate that additional modeling of InsPecT search scores using a semi-parametric approach incorporating the accuracy of the precursor ion mass measurement provides additional improvement in the ability to discriminate between correct and incorrect peptide identifications. The overall superior performance of the sequence tag-based peptide identification method is demonstrated by comparison with a commonly used SEQUEST/PeptideProphet approach.
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DOI:
10.1142/s021972000600248x
发表时间:
2006-12-01
影响因子:
1
作者:
Chong, Ket Fah;Ning, Kang;Pevzner, Pavel
通讯作者:
Pevzner, Pavel
影响因子:
2
作者:
Ma, B;Zhang, KZ;Lajoie, G
通讯作者:
Lajoie, G
影响因子:
7.4
作者:
Huang, YY;Triscari, JM;Wysocki, VH
通讯作者:
Wysocki, VH
影响因子:
3.4
作者:
Colinge, J;Magnin, J;Masselot, A
通讯作者:
Masselot, A
影响因子:
7.4
作者:
Frank, A;Pevzner, P
通讯作者:
Pevzner, P