中国农业科学 ›› 2025, Vol. 58 ›› Issue (19): 3799-3813.doi: 10.3864/j.issn.0578-1752.2025.19.001

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

利用酵母双杂交系统筛选与大豆花叶病毒核内含体蛋白互作的大豆寄主因子

于哲(), 周芳雪, 刘润发, 田雅琦, 吉好木哈, 王勇翔, 冯雯蜜, 牟可欣, 井妍(), 李海燕()   

  1. 海南大学热带农林学院/南繁学院(三亚南繁研究院),海南三亚 572025
  • 收稿日期:2025-04-07 接受日期:2025-06-06 出版日期:2025-10-01 发布日期:2025-10-10
  • 通信作者:
    井妍,E-mail:
    李海燕,E-mail:
  • 联系方式: 于哲,E-mail:3314518435@qq.com。
  • 基金资助:
    三亚崖州湾科技城科技专项资助(SCKJ-JYRC-2023-17); 海南省自然科学基金(323RC413); 海南省自然科学基金(324MS013); 国家自然科学基金(32301921); 海南省研究生创新科研课题(Qhys2024-139)

Screening for Soybean Host Factors that Interact with Soybean Mosaic Virus Nuclear Inclusion Proteins Using the Yeast Two-Hybrid System

YU Zhe(), ZHOU FangXue, LIU RunFa, TIAN YaQi, JIHAO MuHa, WANG YongXiang, FENG WenMi, MOU KeXin, JING Yan(), LI HaiYan()   

  1. College of Tropical Agriculture and Forestry, Hainan University/School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Sanya 572025, Hainan
  • Received:2025-04-07 Accepted:2025-06-06 Published:2025-10-01 Online:2025-10-10

摘要:

【目的】由大豆花叶病毒(soybean mosaic virus,SMV)引起的大豆花叶病毒病是大豆最具危害的病毒性病害之一,严重影响大豆的产量和品质。利用酵母文库筛选与SMV核内含体蛋白(NIa-Pro和NIb)互作的寄主蛋白,为深入解析SMV的侵染机制及大豆抗病机制提供理论依据及新思路。【方法】首先,从大豆花叶病毒病株系SMV-HN中分别克隆NIa-ProNIb,将其重组至pGBKT7酵母载体以构建诱饵质粒,通过酵母双杂交文库筛选技术鉴定与2个病毒功能蛋白互作的大豆寄主蛋白。其次,克隆编码外膜孔蛋白16(outer envelope pore protein 16-1,OEP16)的寄主蛋白基因GmOEP16,并通过酵母双杂交(Y2H)和荧光素酶互补试验(LCA)明确GmOEP16与NIa-Pro和NIb的互作关系。再次,利用荧光定量PCR分析GmOEP16在SMV侵染和外源激素诱导下的表达模式。最后,采用病毒诱导的基因瞬时沉默技术(VIGS)对GmOEP16在SMV病程反应中的功能进行验证。【结果】成功构建pGBKT7-NIa-Pro和pGBKT7-NIb诱饵质粒,分别筛选到12个与NIa-Pro和NIb互作的大豆寄主蛋白。利用Y2H试验,验证NIa-Pro与GmOEP16和GmDEG5,以及NIb与GmOEP16、GmZC3H18和GmAHP1存在相互作用;进一步通过LCA试验,明确GmOEP16与NIa-Pro和NIb均可发生相互作用。表达模式分析显示,GmOEP16可以响应SMV的诱导,并可在反应初期快速地响应水杨酸和脱落酸的诱导。VIGS试验表明,有效沉默GmOEP16后,相较于对照组,沉默植株叶片没有出现明显的感病症状,且SMV外壳蛋白(coat protein,CP)基因SMV-CP的表达量显著降低,即大豆增强了对SMV的抗性,说明该基因可负调控大豆对SMV的抗性。【结论】成功构建了pGBKT7-NIa-Pro和pGBKT7-NIb诱饵载体,并各筛选得到12个与它们互作的大豆寄主蛋白。其中,GmOEP16与SMV核内含体蛋白NIa-Pro和NIb存在相互作用;GmOEP16可响应SMV的诱导且负调控SMV抗性,促进SMV的侵染。

关键词: 大豆花叶病毒, 核内含体蛋白, 酵母文库筛选, 外膜孔蛋白16, 病毒诱导的基因沉默

Abstract:

【Objective】Soybean mosaic virus (SMV) is one of the most damaging viral diseases of soybean, which seriously affects soybean yield and quality. Identification of host proteins interacting with SMV nuclear inclusion proteins (NIa-Pro and NIb) using yeast two-hybrid library screening, aiming to establish a theoretical foundation and propose novel perspectives insights into the molecular mechanisms of SMV infection and soybean resistance.【Method】Firstly, the coding sequences of NIa-Pro and NIb were cloned from the SMV strain SMV-HN and recombined into the pGBKT7 vector to construct the bait plasmids, and then soybean proteins interacting with the two viral functional proteins were identified by yeast library screening. Secondly, the host gene GmOEP16 encoding Outer Envelope Pore Protein 16 (OEP16) was cloned, and the interactions of GmOEP16 with NIa-Pro and NIb were clarified by yeast two-hybrid (Y2H) and luciferase complementation assay (LCA). Quantitative real-time PCR (qRT-PCR) was used to analyse the expression pattern of GmOEP16 under SMV treatment and exogenous hormone induction. Finally, virus-induced gene silencing (VIGS) was used to validate the function of GmOEP16 gene in SMV disease response.【Result】pGBKT7-NIa-Pro and pGBKT7-NIb recombinant plasmids were successfully constructed, and 12 soybean host proteins were screened for interactions with NIa-Pro and NIb, respectively. The Y2H assay was further used to verify that NIa-Pro interacted with GmOEP16 and GmDEG5, and NIb interacted with GmOEP16, GmZC3H18 and GmAHP1. The LCA assay was further used to clarify that GmOEP16 interacted with both NIa-Pro and NIb. Expression analysis revealed that GmOEP16 was induced by SMV infection and responded rapidly to salicylic acid (SA) and abscisic acid (ABA) stimuli during early response. The VIGS assay showed that effectively silencing of GmOEP16 resulted in no obvious susceptibility phenotype in leaf tissues relative to the wild-type controls. Meanwhile, the expression of SMV-CP was significantly reduced in the GmOEP16-silenced plants, suggesting that the soybean resistance to SMV was enhanced. Collectively, these findings demonstrated that GmOEP16 could function as a negative regulator of SMV resistance in soybean.【Conclusion】The pGBKT7-NIa-Pro and pGBKT7-NIb bait vectors were successfully constructed, and each 12 soybean host proteins that respectively interacted with pGBKT7-NIa-Pro and pGBKT7-NIb were identified. Among them, GmOEP16 interacted with both NIa-Pro and NIb. GmOEP16 responded to SMV induction and negatively regulated SMV resistance, which promoted SMV infection on soybeans.

Key words: soybean mosaic virus, nuclear inclusion proteins, yeast library screening, outer envelope pore protein 16, virus-induced gene silencing