HSF-like transcription factor, TBF1, is a major molecular switch for growth-to-defense transition in plants
申请人:DUKE UNIVERSITY
公开号:US10017773B2
公开(公告)日:2018-07-10
The present invention relates to new methods to study and control the expression of plant genes, particularly nucleotide sequences located downstream from regions comprising binding sites for transcription factors, such as the cis-element translocon 1 (TL1) comprising GAAGAAGAA and similar sequences. The invention relates to isolated nucleotide sequences comprising a regulatory region comprising a promoter operably-linked to one or more upstream open reading frames (uORFs) and one or more downstream open reading frames (dORFs) encoding one or more functional polypeptides, including transcription factors such as TBF1, reporter polypeptides, and polypeptides conferring resistance to drugs, resistance of plants viral, bacterial, or fungal pathogens, and polypeptides involved in the growth of plants. Related aspects include the use of a region which encodes one or more polypeptides designated uORF1 and uORF2 from Arabidopsis plants, natural and synthetic variants of these polypeptides, and their homologues and orthologues isolated from other plant species, including crop plants, plus vectors, cells, plant propagation material, transgenic plants, and seeds comprising nucleic acids comprising said all or portions of said regulatory region. Other aspects relate to methods of using these regulatory elements to generate and screen for transgenic plants having improved resistance microbial and viral plant pathogens, and engineered cells and plants comprising these one or more of these genetic elements to facilitate the production of proteins for use in structure/function studies, in industrial, medical, and agricultural applications, particularly in the discovery of metabolic pathways involved in the and development of disease-resistant plants.
本发明涉及研究和控制植物基因表达的新方法,特别是位于包含转录因子结合位点的区域下游的核苷酸序列,例如包含GAAGAAGAA和类似序列的顺式元件转座子1(TL1)。本发明涉及分离的核苷酸序列,该序列包含一个调控区,该调控区包括一个启动子,该启动子可操作地连接到一个或多个上游开放阅读框(uORF)和一个或多个下游开放阅读框(dORF),该下游开放阅读框编码一种或多种功能性多肽,包括转录因子(如 TBF1)、报告基因多肽、赋予抗药性的多肽、植物病毒、细菌或真菌病原体的抗性以及参与植物生长的多肽。相关方面包括使用编码来自拟南芥植物的一种或多种多肽的区域,指定为uORF1和uORF2,这些多肽的天然和合成变体,以及它们的同源物和从其他植物物种(包括作物植物)分离的直向同源物,加上载体、细胞、植物繁殖材料、转基因植物和种子,这些植物包括包含所述全部或部分调控区域的核酸。其它方面涉及使用这些调控元件产生和筛选具有更好的抗微生物和病毒植物病原体能力的转基因植物的方法,以及包含这些一个或多个遗传元件的工程细胞和植物,以促进蛋白质的生产,用于结构/功能研究、工业、医学和农业应用,特别是用于发现抗病植物的代谢途径和开发。