Plant Expression Modulating Elements for Gene Control
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Solution Overview
Problem
Current plant genetic engineering techniques lack effective regulatory signals to modulate the expression of genes of interest, limiting the ability to enhance traits such as disease resistance, insect resistance, and yield improvement.
Innovation Solution
The use of expression modulating elements (EMEs) that include specific polynucleotide sequences or their functional fragments, which are heterologous to the endogenous polynucleotide, are introduced into the regulatory regions of plant genes to alter their expression levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional plant genetic engineering techniques are used, then basic gene insertion is achieved, but effective modulation of gene expression is limited
Solution Approach 1:
The patent applies parameter changes by systematically varying the number of EME copies (1-10 copies), the specific EME sequence variants used, and the spacing between copies to optimize gene expression levels. Different EME sequences from various plant species are tested to determine the optimal configuration for achieving desired expression modulation, directly resolving the limitation of conventional techniques by providing tunable expression control.
Solution Approach 2:
The EME elements are designed to be universally applicable across different plant species and gene targets. The same EME sequences can be used to modulate expression of various endogenous or heterologous genes, providing a versatile tool that works across diverse genetic backgrounds and trait improvement scenarios, thereby enhancing both productivity and adaptability.
2Productivity
If multiple copies of EME are introduced to enhance expression modulation, then expression control is improved, but genome complexity increases
Solution Approach 1:
The regulatory region is segmented into discrete EME copy units that can be independently configured. Each EME copy functions as a modular element that can be replicated and arranged in specific numbers and patterns. This segmentation allows systematic optimization of expression levels by adjusting the number of copies without creating unmanageable complexity, as each copy contributes additively to the modulation effect.
3Manufacturing precision
If EME is inserted into endogenous promoter region, then precise expression modulation is achieved, but risk of disrupting native regulatory function increases
Solution Approach 1:
The EME elements are inserted at specific locations within the promoter region where they can locally modulate transcriptional activity without disrupting the overall promoter architecture. The insertion sites are carefully selected to target specific functional domains of the promoter, allowing precise control of expression levels while preserving essential promoter functions such as transcription initiation and RNA polymerase binding.
Data Source
AI summary
The disclosure relates to gene expression modulation elements from plants and their use in modulating the expression of one or more heterologous nucleic acid fragments in plants. The disclosure further discloses compositions, polynucleotide constructs, transformed host cells, plants and seeds containing the expression modulating elements, and methods using the same.