通过分子建模和对接介导的位点定向突变发生及其对bHLH转录因子SPATULA,HECATE1和INDEHISCENT的蛋白-蛋白相互作用的影响
Pablo López-Gómez1,2, Daniela De La Mora-Franco1, Humberto Herrera-Ubaldo1,3
1Advanced Genomics Unit (UGA-Langebio), Center for Research and Advanced Studies (Cinvestav), Irapuato 36824, Mexico.
Plants (Basel, Switzerland)
|June 27, 2025
概括
预测的蛋白质相互作用部位对于Arabidopsis. gynoecium发育至关重要. 使用计算工具修改这些地点破坏了相互作用,导致植物发育发生变化并降低了种子产量.
科学领域:
- 植物分子生物学 植物分子生物学
- 发展生物学 发展生物学
- 计算生物学 计算生物学
背景情况:
- 基本的螺旋环-螺旋环 (bHLH) 转录因子调节了植物的发育.
- 蛋白与蛋白相互作用 (PPI) 对于Arabidopsis gynoecium发育中的bHLH功能至关重要.
- 识别功能性PPI部位对于理解发育调节至关重要.
研究的目的:
- 调查预测的PPI位点在bHLH转录因子中的生物相关性.
- 评估修改这些相互作用位点对Arabidopsis thaliana的菌体和果实发育的影响.
- 评估用于预测和验证PPI的计算工具的实用性.
主要方法:
- 使用AlphaFold2.2.生成bHLH蛋白的3D蛋白质结构 (SPATULA,HECATE1,INDEHISCENT) 使用AlphaFold2.2.
- 通过使用HawkDock服务器通过分子对接识别了潜在的相互作用站点.
- 使用定位突变和双分子光补充 (BiFC) 试验来测试PPI.
- 在Arabidopsis中进行过度表达研究,以分析发育表型.
主要成果:
- 预测部位的突变取消了SPT-HEC1相互作用,减少了SPT-IND相互作用.
- 在阿拉比多普西斯中,修改后的bHLH基因过度表达导致了显著的菌和水果发育缺陷.
- 特定的修改 (例如35S::SPT-4A,35S::HEC1-2A,35S::IND-3A) 导致种子数量减少,果实更短.
结论:
- 预测的蛋白质-蛋白质相互作用部位对bHLH功能具有生物学相关性.
- 这些相互作用部位的破坏直接影响Arabidopsis gynoecium和水果发育.
- 计算预测工具对于识别和研究功能蛋白相互作用是有效的.
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