Exogenous Fungal Terminator Sequences for Transcription Control
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Solution Overview
Problem
Current expression constructs in fungi cells rely on lengthy native terminator sequences, which impose a transcription burden and limit large-scale synthesis, necessitating the development of shorter exogenous terminator sequences to enhance RNA output and reduce cellular burden.
Innovation Solution
The use of short exogenous fungi transcription terminating nucleic acid sequences, specifically designed with efficiency, positioning, and polyadenylation site nucleic acid sequences, along with linking sequences, to modulate transcription termination and increase RNA output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If native terminator sequences are used, then transcription termination function is achieved, but terminator length becomes excessive (greater than 500-1000 base pairs) imposing additional transcription burden on the cell
Solution Approach 1:
The patent extracts only the essential functional elements required for transcription termination from the lengthy native terminator sequences. By identifying and isolating the core termination motifs and polyadenylation sites, the invention creates truncated terminator sequences that retain termination function while reducing length to less than 200 base pairs, thereby eliminating the transcription burden imposed by excessive length.
Solution Approach 2:
The patent segments the native terminator sequence into distinct functional modules: polyadenylation signals, termination motifs, and linking regions. This segmentation allows each element to be optimized independently for function and length, enabling the creation of compact exogenous terminators that maintain reliability while minimizing overall sequence length.
2Reliability
If native terminator sequences are used, then transcription termination is achieved, but large scale synthesis in the lab becomes limited
Solution Approach 1:
By extracting only the essential termination function from lengthy native sequences, the patent creates compact exogenous terminators that can be synthesized more efficiently and incorporated into expression constructs at larger scales without overwhelming cellular machinery or limiting laboratory production capacity.
3Productivity
If short exogenous terminator sequences are designed, then transcription burden is reduced and RNA output increases, but sequence design complexity increases
Solution Approach 1:
The patent divides the terminator design into standardized functional segments with defined consensus sequences and length parameters. This modular approach provides a systematic framework for designing short terminators, reducing the complexity of sequence design while maintaining high RNA output through optimized termination efficiency.
Solution Approach 2:
The patent establishes specific parameter ranges for each terminator element (e.g., poly A tail length of 5-50 nucleotides, termination motif repetitions of 3-20 units) that optimize transcription termination efficiency. By defining these parameters, the invention simplifies the design process while maximizing RNA output through evidence-based sequence characteristics.
Data Source
AI summary
Provided herein are exogenous terminator sequences for use in fungi cell transcriptional termination.