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阿尔夫激活器GBF1的特定位点酸化差异性调节了戈尔吉恒温和分泌与细胞动因学中的GBF1功能
Kendall Walton1, Tomasz J Nawara2, Allyson R Angermeier2
1Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, MCLM 668, Birmingham, AL, 35233-2008, USA. kwalton1@uab.edu.
Scientific reports
|August 21, 2023
概括
瓜核酸交换因子GBF1的酸化差异性调节其在戈尔吉恒温和细胞分裂中的作用. 特定的酸化部位控制GBF1的发生.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 关氨酸核酸交换因子GBF1对于各种细胞过程至关重要,包括膜流通,脂质稳态和细胞运动.
- 调节GBF1的特定细胞功能仍然在很大程度上是未知的.
研究的目的:
- 研究酸化如何调节GBF1在戈尔吉恒温和细胞运动中的独特作用.
- 确定GBF1上的特定酸化位点,以差异控制其功能.
主要方法:
- 局部定向突变生成以产生模仿GBF1酸化的和非酸化的突变物.
- 功能性测试来评估戈尔吉架构和分泌通路功能.
- 在表达GBF1突变的细胞中分析细胞分裂,包括线粒分裂和细胞运动.
主要成果:
- 在S233,S371,Y377和Y515中模仿酸化的GBF1突变,或非酸化的S233A突变,保持戈尔吉平衡和分泌.
- 这些相同的GBF1突变损害了细胞动力学,导致多核化和线性进展和细胞动力学桥梁分辨率的缺陷.
- GBF1集成到不同的细胞网络中,用于戈尔吉功能与细胞运动.
结论:
- 在GBF1的N端域中酸化特定的氨酸和氨酸残留物对其功能有差异性调节.
- GBF1在戈尔吉平衡和分泌中的参与与其在细胞动力学中的作用不同.
- 通过酸化的差异调节控制GBF1的集成到特定的细胞交互网络.
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