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An efficient method for dephosphorylation of phosphopeptides by cerium oxide

机译:氧化铈使磷酸肽脱磷酸的有效方法

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In this article, an effective method for dephosphorylation of phosphopeptides by cerium oxide is described. The dephosphorylation activity of cerium oxide was evaluated by two standard phosphopeptides and the phosphopeptides in digests of phosphoprotein alpha-casein and beta-casein. Results showed that the dephosphorylation of all the phosphopeptides was completed in 10 min, and temperature had little effect on the dephosphorylation, the dephosphorylation could be carried out at 0 degrees C, room temperature and 37 degrees C. The dephosphorylation mediated by cerium oxide can be attributed to Lewis acid and nucleophile activations. Advantages of using cerium oxide as catalyst for the dephosphorylation include: safe, simple, high catalytic activity, and no precise control of the treatment temperature. The method is valid for the phosphorylation of Ser, Thr and Tyr, and can be used for phosphoprotein analysis.
机译:在这篇文章中,描述了一种通过氧化铈使磷酸肽脱磷酸的有效方法。用两种标准的磷酸肽和磷酸化蛋白α-酪蛋白和β-酪蛋白消化物中的磷酸肽评估氧化铈的去磷酸化活性。结果表明,所有磷酸肽的脱磷酸作用均在10min内完成,温度对脱磷酸作用影响不大,可以在0℃,室温和37℃下进行脱磷酸作用。归因于路易斯酸和亲核试剂的活化。使用氧化铈作为催化剂进行脱磷酸作用的优点包括:安全,简单,高催化活性,并且无法精确控制处理温度。该方法对Ser,Thr和Tyr的磷酸化有效,可用于磷蛋白分析。

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