Lyciumin Cyclic Peptide Production via Segmented Precursor Design
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Solution Overview
Problem
Current technologies face challenges in discovering and developing new peptide-based drugs and agrochemicals due to emerging resistance against existing antibiotics and pest control agents, as well as the need for innovative solutions to modulate the rhizosphere for improved plant fitness.
Innovation Solution
A method for producing lyciumin cyclic peptides by providing a host cell with a transgene encoding a lyciumin precursor peptide, expressing the transgene to produce the precursor peptide, and converting it into lyciumin cyclic peptides, which can be used to create a library of lyciumin peptides for various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heterologous expression system is used for lyciumin production, then production capability is improved, but process complexity increases
Solution Approach 1:
The precursor peptide is divided into multiple core lyciumin peptide domains separated by linker sequences. Each domain can be independently processed by proteases to generate individual lyciumin cyclic peptides, enabling modular production and simplifying the overall process architecture.
Solution Approach 2:
The precursor peptide is pre-engineered with specific protease cleavage sites (arginine residues) and linker sequences that facilitate automated processing. This preliminary design enables the heterologous system to automatically generate diverse lyciumin peptides through sequential proteolytic cleavage, reducing the need for complex downstream processing.
2Adaptability or versatility
If multiple core lyciumin peptide domains are included in precursor peptide, then peptide diversity is improved, but manufacturing precision requirements increase
Solution Approach 1:
Different core lyciumin peptide domains are embedded within the precursor peptide, each with specific amino acid sequences that determine the properties of the resulting cyclic peptides. The linker sequences between domains provide standardized cleavage sites, allowing precise local processing while maintaining overall peptide diversity.
Solution Approach 2:
The invention uses variable parameters in the core peptide sequences and linker regions to generate diversity. By modifying amino acid residues at specific positions and adjusting linker lengths/compositions, a library of diverse lyciumin peptides can be produced from a single precursor gene through controlled proteolytic processing.
3Productivity
If host cell expresses multiple processing enzymes, then conversion efficiency is improved, but system complexity increases
Solution Approach 1:
The precursor peptide design incorporates multiple arginine residues that serve as universal cleavage sites for various proteases. This universal recognition sequence allows a single protease or combination of proteases to process multiple different core domains, reducing the number of specialized enzymes needed while maintaining high conversion efficiency.
Solution Approach 2:
The precursor peptide contains all necessary structural elements (core domains, linkers, cleavage sites) required for its own processing into diverse cyclic peptides. The heterologous host cell only needs to provide basic proteolytic activity, while the substrate itself provides the instructions for its own diversification and maturation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables the production of lyciumin cyclic peptides that can be used in pharmaceutical and agrochemical applications, addressing resistance issues and improving plant fitness by modulating the rhizosphere.
Implementation Method 1
expressing the transgene in the host cell to thereby produce a lyciumin precursor peptide
Implementation Method 2
expressing the transgene in the host cell to thereby produce a lyciumin precursor peptide
Implementation Method 3
The host cell can express one or more of: an enzyme that cyclizes the lyciumin precursor peptide
Implementation Method 4
The host cell can express one or more of: an endopeptidase; a glutamine cyclotransferase; and/or an exopeptidase
Data Source
AI summary
Lyciumin cyclic peptides and methods of producing lyciumin cyclic peptides are described. A host cell can include a transgene encoding a lyciumin precursor peptide, or a biologically-active fragment thereof. The lyciumin precursor peptide, or biologically-active fragment thereof, can include one or more core lyciumin peptide domains. The transgene can be expressed in the host cell to thereby produce a lyciumin precursor peptide, or biologically-active fragment thereof. The lyciumin precursor peptide, or biologically-active fragment thereof, can be converted to one or more lyciumin cyclic peptides in the host cell. A library of nucleic acids encoding lyciumin precursor peptides, or biologically-active fragments thereof, can be generated.