Plant Synthetic Promoters

被引:0
|
作者
Szymczyk, Piotr [1 ]
Majewska, Malgorzata [1 ]
机构
[1] Med Univ Lodz, Dept Biol & Pharmaceut Bot, Muszynskiego 1, PL-90151 Lodz, Poland
来源
APPLIED SCIENCES-BASEL | 2024年 / 14卷 / 11期
关键词
plant synthetic promoter; orthogonal systems; bidirectional promoters; TRANSCRIPTION FACTOR-BINDING; GENE-EXPRESSION; TATA-BOX; TRANSGENE STACKING; VASCULAR TISSUE; POSITIONAL DISTRIBUTION; ARABIDOPSIS-THALIANA; ACTIVATED PROMOTERS; REGULATORY MODULES; VECTOR SYSTEM;
D O I
10.3390/app14114877
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
This article examines the structure and functions of the plant synthetic promoters frequently used to precisely regulate complex regulatory routes. It details the composition of native promoters and their interacting proteins to provide a better understanding of the tasks associated with synthetic promoter development. The production of synthetic promoters is performed by relatively small libraries produced generally by basic molecular or genetic engineering methods such as cis-element shuffling or domain swapping. The article also describes the preparation of large-scale libraries supported by synthetic DNA fragments, directed evolution, and machine or deep-learning methodologies. The broader application of novel, synthetic promoters reduces the prevalence of homology-based gene silencing or improves the stability of transgenes. A particularly interesting group of synthetic promoters are bidirectional forms, which can enable the expression of up to eight genes by one regulatory element. The introduction and controlled expression of several genes after one transgenic event strongly decreases the frequency of such problems as complex segregation patterns and the random integration of multiple transgenes. These complications are commonly observed during the transgenic crop development enabled by traditional, multistep transformation using genetic constructs containing a single gene. As previously tested DNA promoter fragments demonstrate low complexity and homology, their abundance can be increased by using orthogonal expression systems composed of synthetic promoters and trans-factors that do not occur in nature or arise from different species. Their structure, functions, and applications are rendered in the article. Among them are presented orthogonal systems based on transcription activator-like effectors (dTALEs), synthetic dTALE activated promoters (STAPs) and dCas9-dependent artificial trans-factors (ATFs). Synthetic plant promoters are valuable tools for providing precise spatiotemporal regulation and introducing logic gates into the complex genetic traits that are important for basic research studies and their application in crop plant development. Precisely regulated metabolic routes are less prone to undesirable feedback regulation and energy waste, thus improving the efficiency of transgenic crops.
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页数:29
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