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通过UFL1介导的UFMylation对抗IFT88的无化和降解,以维持纤维细胞平衡

Runa Wang¹, Guizhi Guo¹, Renshuai Zhang¹

¹Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, China.

Cell death and differentiation

|November 22, 2025

概括

UFMylation是一种蛋白质修饰,对于纤毛细胞平衡至关重要. UFM1结合酶1 (UFL1) 酶调节肌内运输88 (IFT88) 的稳定性,防止降解并维持各种组织中的纤毛功能.

科学领域:

生物化学生物化学
细胞生物学细胞生物学
分子生物学分子生物学

背景情况:

转化后修饰的UFMylation与人类疾病有关,但其机制尚不清楚.
特定于UFM1的酶1 (UFL1) 是负责催化UFMylation的主要酶.
乳毛在细胞功能中起着至关重要的作用,并与各种人类疾病有关.

研究的目的:

为了研究UFL1在状细胞平衡中的作用.
阐明UFMylation影响纤毛功能的分子机制.
为了确定纤毛病的新型治疗点.

主要方法:

在小鼠中对UFL1进行基因切除.
在各种组织中分析状细胞的结构和功能.
生物化学试验用于研究蛋白质-蛋白质相互作用和翻译后修改.

主要成果:

在小鼠中,UFL1对于维持状细胞结构和功能至关重要.
在氨酸572中,UFMylation的胞内运输88 (IFT88) 阻止了其在PJA2的泛化和蛋白质体降解.
一种突变的IFT88 (K572R) 显示出增强的稳定性,并挽救了UFL1枯竭引起的膜缺陷.

结论:

IFT88的UFMylation是 ciliary homeostasis的一个关键调节机制.
这项研究揭示了UFMylation在防止IFT88降解,影响状功能方面发挥的新作用.
这些发现为病的分子基础和潜在的治疗策略提供了新的见解.

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