Improvement of shotgun proteomics in the negative mode by carbamylation of peptides and ultraviolet photodissociation mass spectrometry.
Improvement of shotgun proteomics in the negative mode by carbamylation of peptides and ultraviolet photodissociation mass spectrometry.
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DOI:
10.1021/ac5035314
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发表时间:
2014-12-16
影响因子:
7.4
通讯作者:
Brodbelt, Jennifer S.
中科院分区:
文献类型:
--
作者:
Greer, Sylvester M.;Cannon, Joe R.;Brodbelt, Jennifer S.
Although acidic peptides compose a substantial portion of many proteomes, their less efficient ionization during positive polarity electrospray ionization (ESI) impedes their detection in bottom-up mass spectrometry workflows. We have implemented a derivatization strategy based on carbamylation which converts basic amine sites (Lys, N-termini) to less basic amides for enhanced analysis in the negative mode. Ultraviolet photodissociation (UVPD) is used to analyze the resulting peptide anions, as demonstrated for tryptic peptides from bovine serum albumin and Halobacterium salinarum in a high throughput liquid chromatography/tandem mass spectrometry (LC/MS/MS) mode. LC/UVPD-MS of a carbamylated H. salinarum digest resulted in 45% more identified peptides and 25% more proteins compared to the unmodified digest analyzed in the negative mode.
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DOI:
10.1074/mcp.m112.023754
发表时间:
2013-06
期刊:
Molecular & cellular proteomics : MCP
影响因子:
--
作者:
Gunaratne J;Schmidt A;Quandt A;Neo SP;Saraç OS;Gracia T;Loguercio S;Ahrné E;Xia RL;Tan KH;Lössner C;Bähler J;Beyer A;Blackstock W;Aebersold R
通讯作者:
Aebersold R
影响因子:
4
作者:
Henderson JC;Fage CD;Cannon JR;Brodbelt JS;Keatinge-Clay AT;Trent MS
通讯作者:
Trent MS
影响因子:
7.4
作者:
Konermann, Lars;Ahadi, Elias;Vahidi, Siavash
通讯作者:
Vahidi, Siavash
影响因子:
3.4
作者:
Madsen, James A.;Kaoud, Tamer S.;Dalby, Kevin N.;Brodbelt, Jennifer S.
通讯作者:
Brodbelt, Jennifer S.
DOI:
10.1007/s13361-012-0424-9
发表时间:
2012-10
影响因子:
3.2
作者:
Shaw, Jared B.;Madsen, James A.;Xu, Hua;Brodbelt, Jennifer S.
通讯作者:
Brodbelt, Jennifer S.