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园艺学报 ›› 2025, Vol. 52 ›› Issue (11): 2846-2860.doi: 10.16420/j.issn.0513-353x.2024-0889

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

葡萄胚珠发育转录因子VvDDF2互作蛋白的筛选与验证

刘苗苗, 姚锦, 邹福艳, 楚言言, 王西平*()   

  1. 西北农林科技大学园艺学院西北农林科技大学作物抗逆与高效生产全国重点实验室,农业部西北地区园艺作物生物学与种质创制重点实验室, 陕西杨凌 712100
  • 收稿日期:2025-03-22 修回日期:2025-07-02 出版日期:2025-11-26 发布日期:2025-11-26
  • 通讯作者:
  • 基金资助:
    NSFC-联合基金重点项目(U1603234); NSFC-联合基金重点项目(陕西省2023年现代种业发展项目); 陕西省重点研发计划项目(2023-YBNY-077)

Screening and Validation of Interacting Proteins of the Grape Ovule Development Transcription Factor VvDDF2

LIU Miaomiao, YAO Jin, ZOU Fuyan, CHU Yanyan, WANG Xiping*()   

  1. State Key Laboratory for Crop Stress Resistance and High-Efficiency ProductionKey Laboratory of Northwest Horticultural Crop Biology and Germplasm Creation,Ministry of Agriculture and Rural Affairs,College of Horticulture,Northwest A & F University,Yangling, Shaanxi 712100, China
  • Received:2025-03-22 Revised:2025-07-02 Published:2025-11-26 Online:2025-11-26

摘要:

为探究葡萄转录因子VvDDF2参与胚珠发育与无核性状形成的调控机制,构建了酵母双杂交诱饵载体pGBKT7-VvDDF2,验证了VvDDF2具有转录自激活活性,且活性区域位于C端。利用酵母双杂交技术,从葡萄胚珠发育cDNA酵母文库中筛选获得VvDDF2的14个候选互作蛋白,包括脂肪酶、胺氧化酶、胞外囊复合体亚基、核糖体大亚基蛋白等多种酶和蛋白,主要参与细胞分裂生长和形态建成、胚胎发育、植物激素信号转导、育性调控以及各类物质的生物合成和代谢反应,在植物种子发育过程中发挥重要的生物学功能。通过酵母双杂交、双分子荧光互补和分裂荧光素酶互补实验进一步验证了VvDDF2与胞外囊复合体亚基VvEXO70A1之间存在互作关系。RT-qPCR分析表明,VvEXO70A1在有核及无核葡萄胚珠发育过程中的表达水平存在显著差异。综上,VvDDF2与VvEXO70A1两者可能通过蛋白相互作用形成复合物协同调控葡萄胚珠发育进程。

关键词: 葡萄, 无核机制, 胚珠发育, VvDDF2, 蛋白互作, VvEXO70A1

Abstract:

In order to investigate the regulatory mechanism of the grape transcription factor VvDDF2 in ovule development and seedless traits formation,the yeast two-hybrid bait vector pGBKT7-VvDDF2 was constructed. It was verified that VvDDF2 had transcriptional self-activation activity and the active region was located at the C terminal. Using yeast two-hybrid system(Y2H),14 candidate interacting proteins of VvDDF2 were screened from the yeast cDNA yeast library related to the development of grape ovule,including lipase,amine oxidase,exocyst complex component,large ribosomal subunit protein and other enzymes and proteins,which are mainly involved in cell division,growth,and morphogenesis,embryonic development,plant hormone signal transduction and fertility regulation,as well as biosynthesis and metabolic reactions of various substances,and play an important biological function in the process of plant seed development. The interaction between VvDDF2 and VvEXO70A1 was further verified by yeast two-hybrid system(Y2H),bimolecular fluorescence complementation(BiFC)and luciferase reporter system(Split-Luc). RT-qPCR analysis showed that the expression level of VvEXO70A1 during the development of grape ovule were significantly different between seeded and seedless grapes. In summary,VvDDF2 and VvEXO70A1 may form a complex through protein interaction to synergistically regulate the development process of grape ovule.

Key words: grape, seedless mechanism, ovule development, VvDDF2, protein interaction, VvEXO70A1