Loss of Elp1 perturbs histone H2A.Z and the Notch signaling pathway.

Loss of Elp1 perturbs histone H2A.Z and the Notch signaling pathway.
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DOI:
10.1242/bio.058979
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发表时间:
2021-09-15
期刊:
影响因子:
2.4
通讯作者:
George L
George L
中科院分区:
生物学4区
文献类型:
--
作者:
Cameron B;Lehrmann E;Chih T;Walters J;Buksch R;Snyder S;Goffena J;Lefcort F;Becker KG;George L

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伸长肌功能障碍越来越被认为是导致多种神经发育和神经退行性疾病的一个原因,包括家族自主神经功能障碍、智力障碍、肌萎缩侧索硬化症和自闭症谱系障碍。尽管许多细胞过程在 Elongator 丢失的情况下受到干扰,但多项研究的综合证据已经确定 Elongator 在细胞中的主要功能是修饰 tRNA 摆动尿苷和密码子偏倚基因的翻译调节。在这里,我们将编码变体 H2a 组蛋白 H2A.Z 的 H2a.z 表征为间接延伸靶标。我们进一步表明,规范的 Notch 信号传导(一条由 H2A.Z 指导的通路)由于 Elp1 丢失而受到干扰。最后,我们证明,在神经发生过程中,通过暴露于组蛋白脱乙酰酶抑制剂曲古抑菌素 A,H2A.Z 和其他组蛋白的超乙酰化可以纠正 Notch3 的表达,并挽救缺乏 Elp1 Elongator 亚基的胚胎中感觉神经元的发育。摘要:Elongator 敲除胚胎中感觉神经元的发育不良与 H2A.Z 升高和 Notch 信号传导紊乱有关,而曲古抑菌素 A 可以挽救这些信号。
Elongator dysfunction is increasingly recognized as a contributor to multiple neurodevelopmental and neurodegenerative disorders including familial dysautonomia, intellectual disability, amyotrophic lateral sclerosis, and autism spectrum disorder. Although numerous cellular processes are perturbed in the context of Elongator loss, converging evidence from multiple studies has resolved Elongator's primary function in the cell to the modification of tRNA wobble uridines and the translational regulation of codon-biased genes. Here we characterize H2a.z, encoding the variant H2a histone H2A.Z, as an indirect Elongator target. We further show that canonical Notch signaling, a pathway directed by H2A.Z, is perturbed as a consequence of Elp1 loss. Finally, we demonstrate that hyperacetylation of H2A.Z and other histones via exposure to the histone deacetylase inhibitor Trichostatin A during neurogenesis corrects the expression of Notch3 and rescues the development of sensory neurons in embryos lacking the Elp1 Elongator subunit. Summary: The maldevelopment of sensory neurons in Elongator knockout embryos is associated with elevated H2A.Z and perturbed Notch signaling that can be rescued by Trichostatin A.
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