Enhanced MALDI-TOF MS analysis of phosphopeptides using an optimized DHAP/DAHC matrix.
Enhanced MALDI-TOF MS analysis of phosphopeptides using an optimized DHAP/DAHC matrix.
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使用优化的 DHAP/DAHC 矩阵增强磷酸肽的 MALDI-TOF MS 分析
DOI:
10.1155/2010/759690
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发表时间:
2010
影响因子:
--
通讯作者:
Yang F
中科院分区:
文献类型:
--
作者:
Hou J;Xie Z;Xue P;Cui Z;Chen X;Li J;Cai T;Wu P;Yang F
Selecting an appropriate matrix solution is one of the most effective means of increasing the ionization efficiency of phosphopeptides in matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). In this study, we systematically assessed matrix combinations of 2, 6-dihydroxyacetophenone (DHAP) and diammonium hydrogen citrate (DAHC), and demonstrated that the low ratio DHAP/DAHC matrix was more effective in enhancing the ionization of phosphopeptides. Low femtomole level of phosphopeptides from the tryptic digests of α-casein and β-casein was readily detected by MALDI-TOF-MS in both positive and negative ion mode without desalination or phosphopeptide enrichment. Compared with the DHB/PA matrix, the optimized DHAP/DAHC matrix yielded superior sample homogeneity and higher phosphopeptide measurement sensitivity, particularly when multiple phosphorylated peptides were assessed. Finally, the DHAP/DAHC matrix was applied to identify phosphorylation sites from α-casein and β-casein and to characterize two phosphorylation sites from the human histone H1 treated with Cyclin-Dependent Kinase-1 (CDK1) by MALDI-TOF/TOF MS.
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DOI:
10.1016/1044-0305(95)00675-3
发表时间:
1996-03-01
影响因子:
3.2
作者:
Busman, M;Schey, KL;Knapp, DR
通讯作者:
Knapp, DR
影响因子:
7.4
作者:
Xu, Chong-Feng;Wang, Huaibin;Neubert, Thomas A.
通讯作者:
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DOI:
10.1016/s1044-0305(98)00129-9
发表时间:
1999-01-01
影响因子:
3.2
作者:
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通讯作者:
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影响因子:
4.4
作者:
Khan, M;Takasaki, H;Komatsu, S
通讯作者:
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影响因子:
3.7
作者:
Krintel C;Osmark P;Larsen MR;Resjö S;Logan DT;Holm C
通讯作者:
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