Peptide probes containing a non-hydrolyzable phosphotyrosine-mimetic residue for enrichment of protein tyrosine phosphatases

Peptide probes containing a non-hydrolyzable phosphotyrosine-mimetic residue for enrichment of protein tyrosine phosphatases
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含有不可水解的磷酸酪氨酸模拟残基的肽探针,用于富集蛋白质酪氨酸磷酸酶

DOI:
10.1002/pmic.202100144
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发表时间:
2021
期刊:
影响因子:
3.4
通讯作者:
Ishihama Y.
Ishihama Y.
中科院分区:
生物学3区
文献类型:
--
作者:
Tsumagari K;Niinae T;Otaka A;Ishihama Y.

文献摘要

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我们开发了含有不可水解的磷酸酪氨酸模拟物4-[二氟(膦酰基)甲基]-L-苯丙氨酸(F2 Pmp)的肽探针,用于富集蛋白酪氨酸磷酸酶(PTP)。我们发现,不同的F2 Pmp探针可以富集不同的PTP,这取决于探针序列。此外,含有Src同源2(SH 2)结构域的蛋白质一起富集。重要的是,含有磷酸酪氨酸而不是F2 Pmp的探针由于下拉步骤中的去磷酸化而未能富集PTP。使用含有F2 Pmp的肽的这种富集方法可以是不使用抗体的酪氨酸磷酸酶体分析的通用工具。
We developed peptide probes containing a non‐hydrolyzable phosphotyrosine mimetic, 4‐[difluoro(phosphono)methyl]‐L‐phenylalanine (F2Pmp) for the enrichment of protein tyrosine phosphatases (PTPs). We found that different F2Pmp probes can enrich different PTPs, depending on the probe sequence. Furthermore, proteins containing a Src homology 2 (SH2) domain were enriched together. Importantly, probes containing phosphotyrosine instead of F2Pmp failed to enrich PTPs due to dephosphorylation during the pulldown step. This enrichment approach using peptides containing F2Pmp could be a generic tool for tyrosine phosphatome analysis without the use of antibodies.