Enzymatic Latch Bistable Storage for Biochemical Computing
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Solution Overview
Problem
Current DNA-based biochemical storage systems in biochemical computers suffer from low response speed and large delays in reading and writing information, which hinder high-performance computing.
Innovation Solution
A biochemical computer latch based on enzymatic reactions, where the concentrations or activities of substances and enzymes serve as input, output, and storage signals, utilizing a positive feedback regulation between information storage enzymes and inverse information storage enzymes to achieve bistable characteristics and efficient write/read functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If DNA-based biochemical storage is used, then storage capacity is improved, but response speed deteriorates (takes several hours to read/write)
Solution Approach 1:
The patent replaces the biological DNA transcription and translation process with an enzymatic reaction system. Specifically, it uses a bistable enzymatic reaction circuit where enzyme A catalyzes the production of enzyme B, and enzyme B catalyzes the production of enzyme A, creating a positive feedback loop that achieves rapid switching between two stable states. This substitution of biological processes with controlled enzymatic reactions reduces the read/write time from hours to milliseconds while maintaining storage functionality.
Solution Approach 2:
The patent changes the operational parameters of the storage system by using enzyme concentrations as the storage medium instead of DNA sequences. The bistable system maintains two stable states through controlled enzyme concentrations, allowing rapid switching between logic 0 and logic 1 states. This parameter change enables the system to achieve both high storage capacity and fast response speed by manipulating enzyme activity and concentration levels.
2Reliability
If DNA transcription and translation process is used, then storage functionality is achieved, but time delay increases (several hours)
Solution Approach 1:
The patent substitutes the complex DNA transcription and translation machinery with a simplified enzymatic reaction circuit. The system uses two enzymes that catalyze each other's production, creating a self-sustaining bistable system. This replacement eliminates the time-consuming biological processes while maintaining reliable storage functionality through the enzymatic positive feedback mechanism, reducing operation time from hours to milliseconds.
Solution Approach 2:
The patent implements a positive feedback mechanism where enzyme A promotes the production of enzyme B, and enzyme B promotes the production of enzyme A. This mutual catalysis creates two stable states that can be maintained indefinitely without continuous input, providing reliable storage functionality. The feedback loop ensures that once a state is established, it is self-maintaining, eliminating the need for continuous biological processes and reducing time delay.
3Adaptability or versatility
If living cells are required for operation, then biochemical reactions can occur, but system complexity and operational constraints increase
Solution Approach 1:
The patent extracts the essential biochemical reaction capability from living cells by using isolated enzymes that can function independently. The bistable system uses enzyme A and enzyme B that catalyze each other's production without requiring cellular machinery, DNA replication, or other complex biological processes. This extraction of core functionality from the cellular context simplifies the system while maintaining biochemical reaction capability.
Solution Approach 2:
The patent uses small molecule substrates and products as intermediaries between the two enzymes, allowing the system to function without direct cellular involvement. The enzymatic reactions proceed through well-defined chemical intermediates that can be controlled in a test tube environment, eliminating the need for complex cellular machinery while maintaining the biochemical reaction capability necessary for storage operations.
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 solution enables faster read/write speeds at the level of milliseconds to picoseconds, eliminating the need for DNA transcription and translation, and allows for flexible operation without relying on living cells, thus enhancing the performance of biochemical computers.
Implementation Method 1
A biochemical computer latch based on enzymatic reactions includes an input signal, an output signal, and a storage signal, wherein the input signal and the output signal are concentrations or activities of substances, the storage signal is a concentration or activity of enzymes
Implementation Method 2
Due to the above-mentioned interplay between the concentration or activity of the information storage enzyme and the concentration or activity of the inverse information storage enzyme, a positive feedback regulation is achieved through changes in the concentration or activity of the information storage enzyme and the concentration or activity of the inverse information storage enzyme
Data Source
AI summary
Disclosed is a biochemical computer latch based on enzymatic reactions. Input, output and storage signals of the latch are concentrations or activities of substances or enzymes. Bistable characteristics of the latch are implemented by a plurality of enzymatic reactions that interact with each other. When the plurality of enzymatic reactions are catalyzed by each other, a positive feedback regulation of enzyme concentration or activity can be achieved, so that the biochemical computer latch can be stabilized in one of a plurality of states and stores information in the state. The latch can change the state thereof by means of a change in the input signal, so as to modify the stored information, and can also read the stored information by means of the output signal. Compared with traditional semiconductor latches, the disclosed can be more conveniently used in biochemical computers without conversion between an electrical signal and a chemical signal.