Abstract：
: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 postprocessing 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.
journal_name
J Proteome Resjournal_title
Journal of proteome researchauthors
Li S,Dabir A,Misal SA,Tang H,Radivojac P,Reilly JPdoi
10.1021/acs.jproteome.6b00468subject
Has Abstractpub_date
2016-10-07 00:00:00pages
3656-3665issue
10eissn
1535-3893issn
1535-3907journal_volume
15pub_type
杂志文章abstract：:Metabolic profiling technology, a massive information provider, has promoted the understanding of the metabolism of multicomponent medicines and its interactions with endogenous metabolites, which was previously a challenge in clarification. In this study, an untargeted GC/MS-based approach was employed to investigate...
journal_title：Journal of proteome research
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journal_title：Journal of proteome research
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journal_title：Journal of proteome research
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更新日期：2013-02-01 00:00:00
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journal_title：Journal of proteome research
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doi：10.1021/pr500491r
更新日期：2014-10-03 00:00:00
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journal_title：Journal of proteome research
pub_type： 杂志文章
doi：10.1021/acs.jproteome.8b00118
更新日期：2018-08-03 00:00:00
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journal_title：Journal of proteome research
pub_type： 杂志文章
doi：10.1021/pr1000253
更新日期：2010-04-05 00:00:00
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journal_title：Journal of proteome research
pub_type： 杂志文章
doi：10.1021/pr200697x
更新日期：2011-12-02 00:00:00
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journal_title：Journal of proteome research
pub_type： 杂志文章
doi：10.1021/acs.jproteome.8b00323
更新日期：2018-10-05 00:00:00
abstract：:The gut microbiota plays a critical role in the pathogenesis of nonalcoholic fatty liver disease (NAFLD). Increased fructose consumption and inadequate copper intake are two critical risk factors in the development of NAFLD. To gain insight into the role of gut microbiota, fecal metabolites, obtained from rats exposed...
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更新日期：2007-03-01 00:00:00
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