SYNZIP Domain Mediated NRPS Assembly
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Solution Overview
Problem
Traditional methods for engineering non-ribosomal peptide synthetases (NRPS) are cumbersome and time-consuming due to the size and repetitive nature of these multimodular enzyme complexes, requiring complex cloning strategies like yeast cloning and LLHR or ExoCET recombination, which are often plagued by technical issues.
Innovation Solution
The development of modified SYNZIP sequences that enable post-translational assembly of NRPS/PKS domains via protein-protein interactions, allowing for the creation of synthetic fusion proteins and complexes with improved assembly efficiency by using truncated SYNZIP amino acid sequences and linker sequences composed of glycine and serine repeats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cloning strategies (yeast cloning, LLHR, ExoCET) are used to engineer NRPS, then complete NRPS assembly is achieved, but the process becomes extremely time-consuming and technically problematic
Solution Approach 1:
The invention divides the NRPS engineering process into two independent stages: (1) domain assembly via post-translational protein-protein interactions using SYNZIP domains, and (2) functional validation. This segmentation eliminates the need for complex cloning strategies while maintaining assembly completeness, reducing engineering time from months to weeks.
Solution Approach 2:
The SYNZIP domain acts as an intermediary component that mediates the assembly of NRPS domains through post-translational protein-protein interactions. This intermediary approach allows domains to self-assemble into functional complexes without requiring complex in vitro recombination strategies, thereby simplifying the engineering process and reducing time requirements.
2Reliability
If complex cloning strategies are employed to assemble NRPS domains, then functional NRPS complexes are produced, but the device complexity and technical difficulty increase significantly
Solution Approach 1:
The SYNZIP domain serves as a standardized intermediary module that simplifies domain assembly. By incorporating SYNZIP domains into NRPS constructs, researchers can use simple co-expression strategies instead of complex cloning protocols, thereby reducing device complexity while maintaining NRPS functionality.
Solution Approach 2:
The SYNZIP domain provides a universal assembly interface that can be applied to any NRPS domain combination. This multi-functional approach allows the same SYNZIP-mediated assembly mechanism to work across different NRPS variants, eliminating the need for custom complex cloning strategies for each case and reducing overall device complexity.
3Reliability
If full-length NRPS proteins are engineered using traditional methods, then complete functionality is achieved, but the repetitive nature and size make the process cumbersome
Solution Approach 1:
The invention segments the NRPS engineering process into domain-level modular units that can be independently expressed and assembled. This segmentation allows researchers to work with smaller, more manageable domain constructs rather than full-length repetitive NRPS proteins, significantly improving ease of manufacture while maintaining complete NRPS activity through post-translational assembly.
Solution Approach 2:
The NRPS domains equipped with SYNZIP motifs perform self-assembly into functional complexes through post-translational protein-protein interactions. This self-service mechanism eliminates the need for complex manual assembly procedures, allowing the system to automatically form functional NRPS complexes from individual domain subunits, thereby greatly enhancing ease of manufacture.
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 approach simplifies the assembly of NRPS/PKS complexes, significantly reducing the complexity and time required for engineering, leading to higher production titers and increased biocombinatorial potential, with optimized SYNZIP truncations and linker insertions enhancing productivity to near or above wild-type levels.
Implementation Method 1
modified SYNZIP sequences that enable post-translational assembly of NRPS/PKS domains via protein-protein interactions
Data Source
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Figure 3(a)~3(c)
AI summary
The invention is based on newly derivatized protein interaction adaptor protein sequences based on SYNZIP protein domains. The improved SYNZIP domain variants of the invention were designed to be suitable for interconnecting domains of non-ribosomal peptide synthetases (NRPS) or domains of polyketide synthases (PKS), such as for generating NRPS-PKS hybrid complexes. The invention provides the SYNZIP derivative sequences, NRPS domains containing them, NRPS domain libraries thereof, as well as methods for the production and use in peptide design, screening and production.