N-磷酸化修饰蛋白质的富集和鉴定方法

蛋白质磷酸化修饰在细胞的信号转导、代谢、发育等生命过程中发挥着重要作用。除了研究较为透彻的发生在丝氨酸、苏氨酸和酪氨酸侧链羟基的O-磷酸化修饰之外，近年来，发生在组氨酸、精氨酸和赖氨酸侧链氨基的N-磷酸化修饰受到了越来越广泛的关注。然而，由于N-磷酸化修饰具有独特的P-N键结构，导致其化学稳定性差。尤其是在O-磷酸化肽段富集常用的酸性条件下，N-磷酸化极易丢失。因此，目前对N-磷酸化蛋白质的研究仍处于初始阶段。该文针对蛋白质N-磷酸化修饰的特点、富集和鉴定方法进行了综述，并对其发展前景进行了展望。

Advancesin enrichment and detection methods for N-phosphorylated proteins

Protein phosphorylation plays an important role in various life processes, such as signaling, metabolism, and growth. In addition to the well-known O-phosphorylation, which occurs on serine, threonine and tyrosine side chains, N-phosphorylation, occurring on histidine, arginine and lysine side chains, has attracted much attention. However, due to the chemical instability of N-phosphorylation, the studies on it are still in the nascent stage. In this review, enrichment and detection methods for protein N-phosphorylation are reviewed, and future research in this field is prospected.