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Preparation of zirconium arsenate-modified monolithic column for selective enrichment of phosphopeptides.
Qin, Zhang-Na; Chen, Xi; Yu, Qiong-Wei; Ding, Jun; Feng, Yu-Qi.
Afiliação
  • Qin ZN; Department of Chemistry, Wuhan University, Wuhan, P. R. China.
  • Chen X; Wuhan Institute of Biotechnology, Wuhan, P. R. China.
  • Yu QW; Department of Chemistry, Wuhan University, Wuhan, P. R. China.
  • Ding J; Department of Chemistry, Wuhan University, Wuhan, P. R. China.
  • Feng YQ; Department of Chemistry, Wuhan University, Wuhan, P. R. China.
J Sep Sci ; 44(2): 609-617, 2021 Jan.
Article em En | MEDLINE | ID: mdl-33185029
ABSTRACT
Protein phosphorylation is a crucial posttranslational modification for the regulation of many different biological functions. Selective enrichment of phosphopeptides from the complex biological samples is an essential step for the mass spectrometry analysis of protein phosphorylation. In this study, an arsenate functionalized monolithic column was first prepared by a single-step copolymerization of p-methacryloylaminophenylarsonic acid and ethylene dimethacrylate. Then the metal ions Zr4+ were attached onto the prepared monolithic column via metal-chelate complex formation by Zr4+ and arsenate groups. The obtained monolithic column was employed as a new sorbent for the phosphopeptide enrichment via immobilized metal affinity chromatography. Phosphopeptides analysis was realized by polymer monolith microextraction using this monolithic column coupled to both matrix-assisted laser desorption/ionization mass spectrometry and liquid chromatography-electrospray ionization tandem mass spectrometry. The proposed method exhibited a high selectivity for phosphopeptide enrichment in complex matrices, and was applied to the analysis of phosphopeptides in human serum and tryptic digests of rat brain proteins. Four phosphopeptides could be selectively captured from human serum and 2608 endogenous phosphopeptides were identified from the tryptic digests of rat brain proteins, indicating a satisfactory performance of this method for the enrichment of phosphopeptides from complex biological samples.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Fosfopeptídeos / Arseniatos / Zircônio Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Fosfopeptídeos / Arseniatos / Zircônio Idioma: En Ano de publicação: 2021 Tipo de documento: Article