Plant Promoter Sequences for Stable Constitutive Gene Expression
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Solution Overview
Problem
Existing methods for modifying plant genes to alter phenotypic characteristics lack efficient means to drive and control gene expression, necessitating the development of effective promoters and motifs for transgenic plants.
Innovation Solution
The use of transcription regulating nucleotide sequences, such as those at least 60% identical to SEQ ID NO: 1-6, to create expression cassettes that enable constitutive expression of polynucleotides in plants, with optional editing of the GATCTG motif to enhance expression stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing methods for modifying plant genes are used, then genetic modification can be achieved, but efficient means to drive and control gene expression are lacking
Solution Approach 1:
The patent identifies and characterizes specific promoter sequences (SEQ ID NO: 1-6) with optimized parameters for driving gene expression in plants. These promoters were selected and validated to provide constitutive expression across different plant tissues, resolving the lack of effective promoters by providing concrete sequence parameters that work reliably.
Solution Approach 2:
The patent creates copies of identified promoter sequences and distributes them through expression cassettes for use in various transgenic applications. The standardized promoter sequences can be replicated and used across different genetic modification projects, eliminating the need to develop new promoters for each application.
2Productivity
If transcription regulating nucleotide sequences are used to drive gene expression, then expression levels increase, but variation in expression stability may occur
Solution Approach 1:
The patent employs screening and validation processes to identify promoter sequences that provide stable expression. By testing and selecting promoters that consistently perform across different conditions, the patent creates a feedback mechanism that ensures reliability while maintaining high expression levels.
Solution Approach 2:
The patent optimizes promoter sequences by identifying specific characteristics (such as the absence of certain motifs like GATCTG) that correlate with stable expression. By adjusting promoter sequence parameters based on empirical data, the patent achieves both high expression levels and improved stability.
3Productivity
If the GATCTG motif is present in promoter sequences, then expression may occur, but expression stability and efficiency are reduced
Solution Approach 1:
The patent identifies the GATCTG motif as a detrimental element that reduces expression stability and systematically removes it from promoter sequences. By extracting this problematic motif from the promoter design, the patent achieves more consistent and efficient gene expression without compromising the promoter's ability to drive transcription.
Data Source
AI summary
Described herein are transcription regulating nucleotide sequences and the use of such transcription regulating nucleotide sequences to express a polynucleotide of interest in plants.