植物独特的蛋白质DRIF1与排序nexin1协调,以调节膜蛋白同质稳定
Ying Zhu1, Qiong Zhao2, Wenhan Cao1,3
1School of Life Sciences, Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong, China.
The Plant cell
|August 30, 2023
概括
研究人员确定了DRIF1,这是植物膜蛋白分类和真空降解的关键蛋白质. DRIF1与FREE1相互作用,调节多胞体的形成和蛋白质的贩运,影响植物的生长.
科学领域:
- 植物细胞生物学 植物细胞生物学
- 分子植物科学 分子植物科学
- 膜贩卖 膜贩卖 膜贩卖
背景情况:
- 膜蛋白平衡对于植物生长和与环境的相互作用至关重要.
- 运输 (ESCRT) 机器所需的内体细胞分类复合体调节了内囊泡 (ILV) 的形成和蛋白质分类到真空孔.
- 植物特异性的ESCRT组件FYVE DOMAIN PROTEIN REQUIRED FOR ENDOSOMAL SORTING1 (FREE1) 在植物中具有多方面的作用,其潜在机制需要阐明.
研究的目的:
- 确定涉及FREE1介导途径的新型组件.
- 描述植物膜蛋白贩运中已识别的抑制剂的功能.
- 阐明控制植物多层细胞体形成和蛋白质降解的分子机制.
主要方法:
- 在Arabidopsis thaliana中对FREE1-RNAi突变进行了抑制选.
- 鉴定和表征了两个抑制突变,sof10和sof641,揭示了AT5G10370 (DRIF1) 中的突变.
- 分析了drif1 drif2双突变体,以评估胚胎发育和多胞体 (MVB) 形态;研究了DRIF1与排序nexin 1的相互作用及其在PIN-FORMED2回收中的作用.
主要成果:
- 确定了DEAH和RING域含有蛋白质的FREE1抑制剂1 (DRIF1) 和其同类DRIF2.
- drif1 drif2 双变异体在球状阶段表现出胚胎停产,其MVBs 扩大,含有增加的ILVs.
- DRIF1是一种与膜相关的蛋白质,它与排序nexin 1相互作用,以调节PIN-FORMED2回收.
结论:
- DRIF1是一种新型的逆转激素相互作用体,对植物膜蛋白质稳态至关重要.
- DRIF1主导着依赖FREE1的ILV形成和膜蛋白的真空分类以进行降解.
- 了解DRIF1的功能,可以了解植物中的ESCRT和逆转激素路径协调.
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