Glycine Promoters and Terminators for Constitutive Soybean Expression
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Solution Overview
Problem
There is a limited choice of promoters and terminators with medium to high constitutive expression for gene expression in soybean plants, particularly for traits like insect resistance and herbicide tolerance, necessitating the development of additional regulatory elements for robust protein production across various tissues.
Innovation Solution
Utilization of regulatory elements, such as promoters and terminators derived from Glycine species, which are operably linked to heterologous nucleotide sequences to enhance expression in soybean tissues, including leaf, root, seed pod, and embryo.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional promoters and terminators are used for gene expression in soybean, then the expression system is simple and well-established, but the choice of regulatory elements with medium to high constitutive expression is limited
Solution Approach 1:
The patent segments the regulatory element selection into distinct functional categories (promoters with medium expression, promoters with high expression, terminators) and provides multiple specific sequence options for each category. This segmentation allows researchers to systematically choose appropriate regulatory elements based on their specific needs without overwhelming complexity.
Solution Approach 2:
The patent identifies regulatory elements that function universally across multiple soybean tissues and developmental stages. The promoters and terminators described can be used for various traits (insect resistance, herbicide tolerance) and in different tissue types, providing multi-functional utility that expands adaptability without requiring tissue-specific optimization for each application.
2Adaptability or versatility
If additional regulatory elements are developed to expand choices, then the adaptability and versatility of expression cassettes improve, but the complexity of identifying and characterizing new sequences increases
Solution Approach 1:
The patent performs preliminary identification, isolation, and characterization of multiple promoter and terminator sequences from soybean genomic DNA before they are made available for use. The sequences have already been tested and validated for their expression characteristics, so researchers can directly utilize these pre-characterized elements without needing to perform their own extensive characterization work.
Solution Approach 2:
The patent provides complete nucleotide sequences that can be directly copied and used in expression cassettes. The sequences are presented in a format ready for cloning and implementation, eliminating the need for researchers to de novo identify and characterize similar regulatory elements.
3Productivity
If robust protein production across all soybean tissues is achieved, then the productivity and trait expression improve, but the requirement for tissue-specific high expression promoters increases complexity
Solution Approach 1:
The patent describes promoters that function as constitutive promoters with medium to high expression levels across multiple soybean tissues including leaves, roots, seeds, and embryos. These universal promoters eliminate the need for separate tissue-specific promoters for each organ, achieving robust protein production systemically while simplifying the overall expression cassette design.
Data Source
AI summary
Provided herein are regulatory elements, such as promoters and terminators, derived or obtained from various Glycine species. Such regulatory elements are useful for expression cassettes for plants, such as soybean. Such expression cassettes generally contain a promoter and terminator sequence to control expression of each coding sequence. For certain traits, such as insect resistance and herbicide tolerance, it may be desirable to use promoters and terminators with medium to high constitutive expression.