AdoMet Analogues with Activated Groups for Methyltransferase Labeling
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Solution Overview
Problem
Current methods for synthesizing S-adenosyl-L-methionine (AdoMet) analogues are inefficient, particularly in introducing reactive functionalities, which limits their utility in therapy and diagnosis due to low yields and compatibility issues with enzyme-catalyzed methods, and the need for selective substrate action for specific methyltransferase enzymes.
Innovation Solution
A compound of formula (I) is synthesized, where X is S or Se, R1 includes a specific structure with a hydrolysable moiety and unsaturated groups, allowing for the introduction of various functional groups, and a method involving reactions with halogen donors, homocysteine, and leaving groups is used to produce the analogue, enabling enhanced selectivity and reactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If enzyme-catalyzed synthesis methods are used to produce AdoMet analogues, then compatibility with functional group introduction is improved, but the reaction scale is limited to μmol scale which is about 1000-fold lower than chemical synthesis
Solution Approach 1:
The patent uses chemical synthesis methods as an intermediary approach to produce AdoMet analogues at larger scales, bypassing the scale limitations of enzyme-catalyzed methods while maintaining the ability to introduce diverse functional groups through chemical reactions
Solution Approach 2:
The patent changes the synthesis parameters from enzyme-catalyzed (biological) to chemical synthesis, enabling production at scales 1000-fold higher while still achieving functional group introduction through appropriate reagent selection
2Adaptability or versatility
If protection groups are used to introduce reactive functionalities in AdoMet analogues, then the introduction of functional groups is enabled, but the yield is lowered and the number of synthetic steps is increased
Solution Approach 1:
The patent employs protection groups strategically in the synthesis pathway, applying them only when necessary to enable specific functional group introductions, thereby minimizing their use and associated drawbacks while maintaining synthetic flexibility
Solution Approach 2:
The synthesis is divided into discrete steps where protection groups are applied and removed selectively at specific stages, allowing precise control over functional group introduction while managing the overall synthetic complexity
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
The synthesized AdoMet analogues demonstrate increased activity and selectivity with methyltransferases, facilitating targeted modifications of biomolecules and improving diagnostic and therapeutic applications by enhancing the introduction of functional groups and labels.
Implementation Method 1
Methyltransferases are epigenetic regulators that methylate their target molecules (DNA, RNA, proteins or small molecules) using a methyl group from the AdoMet cofactor
Implementation Method 2
Methyltransferases (MTases) are emerging as important tools for the site-selective modification of DNA, RNA, and proteins
Implementation Method 3
an S-adenosyl-L-methionine cofactor analogue is employed wherein the methyl group of the natural S-adenosyl-L-methionine cofactor is exchanged for a different moiety
Data Source
AI summary
Provided herein are analogues of S-adenosyl-L-methionine, methods of their preparation, and complexes and kits comprising the analogues. Said analogues find use in modifying, labelling and analysing a target molecule such as a nucleic acid.