在PARP9/DTX3L和PARP14中的KH类域协调蛋白-蛋白相互作用以促进癌细胞生存
Hadil Saleh1, Triantafillos Liloglou2, Daniel J Rigden3
1University of Liverpool, Department of Molecular and Clinical Cancer Medicine, 6 West Derby St, Liverpool L7 8TX, UK.
Journal of molecular biology
|January 5, 2024
概括
PARP9-DTX3L-PARP14蛋白质复合体通过相互作用,而不是酶活性,促进头支状细胞癌 (HNSCC) 的癌细胞存活. 这种相互作用对于HNSCC.的支持生存信号至关重要.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- ADP-ribosyltransferase (ARTD或PARP) 酶参与细胞应激反应,并在瘤中被上调调节.
- PARP9,DTX3L和PARP14蛋白水平与头部和部状细胞癌 (HNSCC) 相相关.
研究的目的:
- 研究PARP14.的PARP9/DTX3L调节的机制.
- 描述PARP9-DTX3L-PARP14相互作用在癌细胞存活中的作用.
主要方法:
- 在HNSCC和HeLa细胞系中减少PARP9,DTX3L或PARP14.
- PARP14切断的表达方式.
- 分析涉及KH类域的蛋白质-蛋白质相互作用.
- 在体外ADP-ribosylation测定.
主要成果:
- 削减PARP9,DTX3L或PARP14通过减少增殖和增加亡,降低了HNSCC细胞存活率.
- 在 PARP14 中的一种 KH 类域部分挽救了细胞存活率.
- 在PARP9,DTX3L和PARP14中的KH类域调解蛋白质与蛋白质的相互作用.
- DTX3L结合抑制了PARP14自身ADP-ribosylation,并促进了PARP9和DTX3L的跨ADP-ribosylation.
- PARP14的促生存作用独立于其ADP-ribosyltransferase活性.
结论:
- 在HNSCC细胞中,PARP9-DTX3L-PARP14相互作用对于支持生存的信号传递至关重要.
- 这些相互作用促进癌细胞生存,独立于PARP14的催化活性.
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