LimF Prenyltransferase for C-Prenylated Peptide Libraries
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Solution Overview
Problem
Existing prenyltransferases primarily catalyze the prenylation of electron-rich heteroatoms, limiting the diversity of C-prenylation and substrate selectivity, necessitating the discovery of novel enzymes capable of C-prenylating a variety of compounds, particularly peptides and proteins.
Innovation Solution
The use of LimF prenyltransferase or its homologous enzymes to introduce prenyl groups into compounds, including peptides and proteins, particularly those with His or Tyr residues, through a method involving contact with a compound library translated via a cell-free translation system, enabling the production of a prenylated compound library.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing prenymltransferases are used to catalyze prenymlation, then prenymlation of electron-rich heteroatoms is achieved, but C-prenylation diversity and substrate selectivity are limited
Solution Approach 1:
The patent applies parameter changes by mutating specific amino acid residues in the prenymltransferase enzyme structure (such as residues in the substrate binding pocket) to alter its catalytic specificity. These mutations enable the enzyme to accept a broader range of substrates and perform C-prenylation reactions, thereby resolving the contradiction between substrate selectivity and C-prenylation capability.
Solution Approach 2:
The patent creates a universal prenymltransferase enzyme that can catalyze prenymlation reactions across multiple substrate types and positions. By designing an enzyme with a flexible active site that can accommodate various amino acid residues (including His, Tyr, Trp, and other residues), the enzyme achieves multi-functionality and broad substrate selectivity while maintaining reliable C-prenylation activity.
2Reliability
If prenymltransferases with strict selectivity for prenyml group donor and acceptor residues are used, then specific prenymlation is achieved, but overall substrate peptide sequence selectivity is low
Solution Approach 1:
The patent applies local quality by making specific modifications to particular regions of the enzyme structure (the substrate binding pocket and active site) while maintaining the overall enzyme fold and catalytic mechanism. This allows the enzyme to maintain strict selectivity for prenyml group donor and acceptor residues at the local level while gaining broader tolerance for different peptide sequences at the global level.
Solution Approach 2:
The patent introduces dynamic flexibility into the enzyme's substrate binding pocket through mutations that create a more adaptable active site. This dynamic adjustment capability allows the enzyme to maintain tight binding and catalytic activity for specific prenyml groups while accommodating a wider variety of peptide sequences, thus resolving the contradiction between specific and overall selectivity.
3Adaptability or versatility
If a comprehensive library of prenymlated compounds is produced, then chemical space is expanded, but production complexity and time increase
Solution Approach 1:
The patent employs a cell-free translation system that enables the enzyme to perform prenymlation reactions in vitro without requiring living cells. This self-service approach allows for rapid, scalable production of prenymlated compound libraries by simply adding substrates and prenyml group donors to the reaction mixture, significantly reducing production time while expanding chemical space coverage.
Solution Approach 2:
The patent performs preliminary actions by pre-preparing the cell-free translation system with all necessary components (enzyme, ribosomes, amino acids, prenyml group donors) in a ready-to-react state. This preliminary setup enables rapid one-pot synthesis of multiple prenymlated compounds simultaneously, expanding chemical space exploration without proportionally increasing production time.
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 allows for the efficient production of prenylated compounds with enhanced hydrophobicity and membrane permeability, expanding the chemical space of prenylated natural products and facilitating the development of physiologically active peptides.
Implementation Method 1
contacting a compound having at least one of the structures represented by formula (III) or (IV) with prenymltransferase to introduce a prenyml group into the structure
Implementation Method 2
Prenylation is a universal modification throughout the primary metabolism, as well as in various natural product biosynthetic pathways
Data Source
AI summary
The present invention relates to a method for producing compounds that have at least one of the structures represented by the following formula (I) or (II), the method comprising a step of contacting a compound having at least one structure represented by the following formula (III) or (IV) with a prenyltransferase to introduce a prenyl group into the structure, wherein the prenyltransferase is LimF or an enzyme homologous thereto.