甘蔗条纹花叶病毒HC-Pro、P3N-PIPO、CP和VPg基因酵母双杂交诱饵表达载体的构建及自激活检测  

Construction and Self-activated Detection of the Baits of HC-Pro,P3N-PIPO,CP and VPg from Sugarcane streak mosaic virus for Yeast Two Hybrid System

作　　者：翟玉山[1] 彭磊[1] 杨永庆[1] 邓宇晴[1] 程光远[1] 郑艳茹[1] 徐景升[1] 

机构地区：[1]福建农林大学,农业部福建甘蔗生物学与遗传育种重点实验室,福建福州350002

出　　处：《华北农学报》2016年第1期83-89,共7页Acta Agriculturae Boreali-Sinica

基　　金：国家高技术研究发展计划“863计划”项目(2013AA102604);国家自然科学基金项目(31171605;31371688)

摘　　要：为探索甘蔗条纹花叶病毒与甘蔗的互作机制,利用酵母双杂交技术筛选与SCSMV互作的甘蔗因子基因,利用PCR技术克隆了SCSMV的HC-Pro、P3N-PIPO、CP和VPg的编码区,构建到酵母双杂交诱饵载体p GBKT7上,获得了p GBKT7-HC-Pro、p GBKT7-P3N-PIPO、p GBKT7-CP和p GBKT7-VPg 4个诱饵载体。结果显示,将重组质粒转化酵母Y2HGold酵母菌株后,酵母菌株在SD/-Trp平板上生长良好,表明重组诱饵质粒表达产物对酵母细胞无毒性;在SD/-Trp/X-α-gal平板上长出白色菌落未变蓝,在SD/-Leu、SD/-Trp/-Ade、SD/-Trp/-His和SD/-Trp/X-α-gal/Ab A平板上不能生长,表明重组诱饵质粒表达产物对MEL1、ADE2、HIS3和AUR1-C报告基因无自激活作用。构建的诱饵表达载体可以作为诱饵用于文库筛选,为探索SCSMV侵染机制和发病机理奠定了基础。Sugarcane streak mosaic virus（ SCSMV） is one of the main pathogens causing mosaic syndrome on sugarcane. Yeast two hybrid system（ Y2HS） is the main technique to investigate the mechanism between pathogen with host plant. In order to elucidate the interaction between the SCSMV and sugarcane by Y2 HS,the coding sequences of HC-Pro,P3N-PIPO,CP and VPg from SCSMV were cloned into the p GBKT7,respectively,to generate 4bait vectors,p GBKT7-HC-Pro,p GBKT7-P3N-PIPO,p GBKT7-CP and p GBKT7-VPg. Then the 4 bait vectors were transformed into the yeast strain Y2 HGold,respectively. All the Y2 HGold strains containing the bait vectors grew well on the SD /-Trp media as the control. It suggested that the proteins encoded by the baits were not toxic to yeast.All these 4 transformed yeast strains developed white but not blue plaques on the SD /-Trp / X-α-gal media. And they could not survive on the SD /-Leu,SD /-Trp /-Ade,SD /-Trp /-His or SD /-Trp / X-α-gal / Ab A media,which indicating the bait proteins could not activate the report genes,such as MEL1,ADE2,HIS3 or AUR1-C. These 4 bait vectors constructed in this study could be used to screen the host proteins interacting with them to investigate the molecular mechanism and pathogenesis of SCSMV infection on sugarcane.

关 键 词：甘蔗条纹花叶病毒 HC-PRO P3N-PIPO CP VPG 诱饵载体 酵母双杂交 

分 类 号：Q78[生物学—分子生物学]