使用CRISPR-Cas9/蛋白组学来识别/卡尔莫杜林依赖激酶2δ的基质
Euijung Park1, Chin-Rang Yang1, Viswanathan Raghuram1
1Epithelial Systems Biology Laboratory, Systems Biology Center, National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland, USA.
The Journal of biological chemistry
|October 21, 2023
概括
/卡尔莫杜林依赖蛋白激酶2三角酶 (CAMK2D) 调节细胞中的水素-2 (AQP2) 酸化. 删除CAMK2D减少了AQP2酸化,在脏收集管中确定了这种激酶的新直接点.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 身体生理学 身体生理学
背景情况:
- /卡尔莫杜林依赖蛋白激酶2 (CAMK2) 家族蛋白调节细胞过程.
- 在脏中,CAMK2δ (CAMK2D) 参与了血管压素信号传递和水素-2 (AQP2) 调节.
- 了解CAMK2D的目标对于脏生理学至关重要.
研究的目的:
- 在脏收集管细胞中识别CAMK2D标蛋白.
- 研究CAMK2D在AQP2调节中的作用.
- 描述CAMK2D的酸化基因和直接目标.
主要方法:
- CRISPR/Cas9基因编辑以创建CAMK2D淘汰赛 (KO) 的mpkCCD细胞系.
- 基于LC-MS/MS的定量基蛋白质组学,使用TMT标签.
- 对AQP2蛋白丰富度,酸化和贩运的分析.
主要成果:
- 在CAMK2DKO细胞中,AQP2蛋白丰度和酸化在Ser256和Ser269.9的水平下降.
- 定量蛋白组学在CAMK2DKO细胞中发现了169个酸盐的减少和206个酸盐的增加.
- 动机分析显示出一种特定的酸化动机-R/K-X-X-p-S/T-X-D/E,35个位点匹配,可能代表直接的CAMK2D目标.
结论:
- 在脏收集管细胞中,CAMK2D在调节AQP2酸化方面发挥着重要作用.
- 这项研究确定了CAMK2D的新型直接标,扩大了这种激酶已知的基质谱.
- 这些发现提供了关于血管压素信号传递和水平衡调节的分子机制的见解.
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