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Global site-specific neddylation profiling reveals that NEDDylated cofilin regulates actin dynamics.
Nature Structural & Molecular Biology ( IF 12.5 ) Pub Date : 2020-02-03 , DOI: 10.1038/s41594-019-0370-3
Annette M Vogl 1 , Lilian Phu 2 , Raquel Becerra 3 , Sebastian A Giusti 3 , Erik Verschueren 2 , Trent B Hinkle 2 , Martín D Bordenave 4 , Max Adrian 1 , Amy Heidersbach 5 , Patricio Yankilevich 3 , Fernando D Stefani 4, 6 , Wolfgang Wurst 7, 8, 9, 10 , Casper C Hoogenraad 1 , Donald S Kirkpatrick 2 , Damian Refojo 3 , Morgan Sheng 1
Affiliation  

Neddylation is the post-translational protein modification most closely related to ubiquitination. Whereas the ubiquitin-like protein NEDD8 is well studied for its role in activating cullin-RING E3 ubiquitin ligases, little is known about other substrates. We developed serial NEDD8-ubiquitin substrate profiling (sNUSP), a method that employs NEDD8 R74K knock-in HEK293 cells, allowing discrimination of endogenous NEDD8- and ubiquitin-modification sites by MS after Lys-C digestion and K-εGG-peptide enrichment. Using sNUSP, we identified 607 neddylation sites dynamically regulated by the neddylation inhibitor MLN4924 and the de-neddylating enzyme NEDP1, implying that many non-cullin proteins are neddylated. Among the candidates, we characterized lysine 112 of the actin regulator cofilin as a novel neddylation event. Global inhibition of neddylation in developing neurons leads to cytoskeletal defects, altered actin dynamics and neurite growth impairments, whereas site-specific neddylation of cofilin at K112 regulates neurite outgrowth, suggesting that cofilin neddylation contributes to the regulation of neuronal actin organization.

中文翻译:

全球站点特定的 neddylation 分析表明 NEDDylated cofilin 调节肌动蛋白动力学。

Neddylation 是与泛素化最密切相关的翻译后蛋白质修饰。尽管泛素样蛋白 NEDD8 因其在激活 cullin-RING E3 泛素连接酶中的作用而得到充分研究,但对其他底物知之甚少。我们开发了连续 NEDD8-泛素底物分析 (sNUSP),这是一种使用 NEDD8 R74K 敲入 HEK293 细胞的方法,允许在 Lys-C 消化和 K-εGG-肽富集后通过 MS 区分内源性 NEDD8 和泛素修饰位点。使用 sNUSP,我们确定了 607 个由 neddylation 抑制剂 MLN4924 和去 neddylating 酶 NEDP1 动态调节的 neddylation 位点,这意味着许多非 cullin 蛋白被 neddylated。在候选者中,我们将肌动蛋白调节因子 cofilin 的赖氨酸 112 表征为一种新的 neddylation 事件。
更新日期:2020-02-03
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