IDR Reagents for Phase-Separated In Vitro Biochemical Reactions
Solution Overview
Problem
Existing biochemical reactions, particularly in vitro reactions, face challenges in efficiency when performed outside laboratory settings, and the use of crowding agents may have drawbacks, necessitating alternative means to enhance performance.
Innovation Solution
Incorporating macromolecules with functional intrinsically disordered regions (IDRs) into the reaction system to cause liquid-liquid demixing and form phase-separated compartments, enhancing the efficiency of biochemical reactions through co-localization of reaction molecules within these compartments, optionally with the aid of multivalent metal ions and ATP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If crowding agents like polyethylene glycol (PEG) are used in recombinase polymerase amplification (RPA) methods, then reaction efficiency is improved, but device complexity and reagent complexity increase
Solution Approach 1:
The patent extracts the essential function of crowding agents (promoting phase separation and molecular co-localization) and implements it through intrinsically disordered regions (IDRs) that are naturally present in certain proteins. This eliminates the need for separate exogenous crowding agents like PEG, thereby reducing reagent complexity while maintaining reaction efficiency.
Solution Approach 2:
The patent makes reaction proteins multi-functional by engineering them to contain IDRs that perform dual functions: (1) maintaining their native catalytic or binding activities, and (2) promoting liquid-liquid phase separation to create concentrated reaction compartments. This eliminates the need for separate crowding agents and simplifies the reagent system.
2Productivity
If exogenous crowding agents are added to enhance reaction efficiency, then productivity increases, but the number of required reagents increases
Solution Approach 1:
The patent merges the function of crowding agents with the reaction proteins themselves by incorporating IDRs into the protein structure. This consolidation reduces the total number of reagents needed while maintaining the efficiency-enhancing effects of phase separation and molecular co-localization.
3Speed
If macromolecular crowding agents are used to drive RPA performance efficiency, then reaction rate increases, but system complexity increases
Solution Approach 1:
The patent enables reaction proteins to self-organize into phase-separated condensates through their intrinsic disordered regions, eliminating the need for external crowding agents to drive the reaction. The system becomes self-sufficient, using the proteins' own structural properties to create the necessary concentrated environment for high reaction rates.
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 introduction of IDR-macromolecules increases the efficiency of biochemical reactions by promoting molecular co-localization and phase separation, surpassing the efficiency of reactions without IDR-tagged polypeptides and potentially eliminating the need for exogenous crowding agents.
Implementation Method 1
maintaining the at least one IDR-macromolecule or the at least one IDR-polypeptide in the system to cause liquid-liquid demixing and the formation of a plurality of phase-separated aqueous compartments within the system
Implementation Method 2
the at least one IDR-macromolecule comprises one or more functional intrinsically disordered regions (IDRs), wherein upon introduction of the at least one IDR-macromolecule into the in vitro reaction system the efficiency of the biochemical reaction is increased
Implementation Method 3
processes for stimulating or enhancing liquid-liquid demixing in a solution using any such macromolecules and polypeptides, including in combination with multivalent metal ions
Data Source
AI summary
The invention relates to processes for performing biochemical reactions, such as in an aqueous in vitro reaction system. The processes involve macromolecules, particularly polypeptides, comprising one or more functional intrinsically disordered regions (IDRs). The invention also relates to IDR-macromolecules, including IDR-polypeptides, including macromolecules or polypeptides comprising a tagged amino acid sequence which comprises or consists of one or more functional IDRs. Such functional IDRs are capable of increasing the efficiency of the biochemical reaction. The invention relates to kits comprising any such macromolecules and polypeptides. The invention further relates to processes for stimulating or enhancing liquid-liquid demixing in a solution using any such macromolecules and polypeptides, including in combination with multivalent metal ions, thereby providing reagents capable of increasing the efficiency of a biochemical reaction.