蛋白质序列编辑SKN-1A/Nrf1通过:N-糖酶控制蛋白质组基因表达
Nicolas J Lehrbach1, Peter C Breen2, Gary Ruvkun1
1Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
Cell
|April 20, 2019
概括
该PNG-1/NGLY1酶编辑SKN-1A蛋白序列,将N-糖化氨酸转化为酸. 这种蛋白序列编辑,而不是脱糖化,对于SKN-1A功能和蛋白质稳定至关重要.
科学领域:
- 分子生物学
- 细胞生物学
- 蛋白质静止
背景情况:
- 蛋白酶分解蛋白质,并通过蛋白质毒性压力进行调节.
- 一个与ER相关的转录因子SKN-1A/Nrf1感知着蛋白质组功能障碍,并对蛋白质组基因进行上调.
- SKN-1A/Nrf1经历了与N结合的糖化.
研究的目的:
- 研究PNG-1/NGLY1在SKN-1A/Nrf1功能中的作用.
- 阐明N结合糖化调节SKN-1A/Nrf1活动的机制.
- 了解这种途径如何促进蛋白质稳定和细胞对蛋白质毒性的抵抗.
主要方法:
- 研究了PNG-1/NGLY1在SKN-1A/Nrf1上的酶活性.
- 利用基因修饰在N-糖化位点引入阿斯巴酸突变.
- 评估了这些修改对SKN-1A/Nrf1功能和蛋白质酶活性的影响.
- 研究了SKN-1A/Nrf1过度激活对抗粉样β毒性的影响.
主要成果:
- 在SKN-1A/Nrf1中,PNG-1/NGLY1将N-糖化氨酸残留物转化为酸.
- 在这些地点引入阿斯巴达酸盐的基因绕过了PNG-1/NGLY1的需求,这表明序列编辑是关键.
- 这种取决于脱糖化的蛋白序列编辑途径对于维持蛋白酶表达和活性至关重要.
- SKN-1A/Nrf1过度激活使得抗人类粉样β蛋白质毒性.
结论:
- 通过脱糖化依赖的蛋白序列编辑,N结合糖化调节SKN-1A/Nrf1功能.
- 这种机制对于维持蛋白质稳定和细胞防御对蛋白质毒性至关重要.
- 该途径解释了SKN-1异型的不同功能,类似于哺乳动物的Nrf1和Nrf2.
关键词:
与N结合的糖化NFE2L1 其他在 NFE2L2没有NGLY1NGLY1 的缺陷没有没有.在PNG-1基因酶SKN-1 其他标签: 美国博尔特佐米布脱糖化葡萄糖生物学神经退行性疾病酸:N-糖酶蛋白质组蛋白质质量控制蛋白质序列编辑蛋白质稳定性更多相关视频
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