Endonuclease Activity Detection for Viable Bacteria
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting bacteria in samples lack efficiency and reliability in differentiating between viable and non-viable microorganisms, and there is a need for novel approaches that utilize enzyme activities as biomarkers.
Innovation Solution
A method utilizing restriction enzyme endonuclease activity as a biomarker, involving a novel DNA substrate design that allows for specific detection of viable bacteria through signal amplification techniques like PCR, leveraging the unique endonuclease profiles of different bacterial species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional bacterial detection methods are used, then detection can be performed, but the ability to differentiate between viable and non-viable microorganisms is insufficient
Solution Approach 1:
The patent introduces an intermediary detection mechanism using endonuclease enzymes as mediators. These enzymes specifically recognize and cleave DNA from viable bacteria, serving as a bridge between the target (viable bacteria) and the detection system. This intermediary approach enables reliable differentiation by detecting only the enzymatic activity present in living cells, not in dead cells where the enzyme is inactive.
Solution Approach 2:
The patent changes the detection parameter from general bacterial presence to specific endonuclease enzymatic activity. By monitoring the catalytic activity of endonuclease enzymes rather than simply detecting bacterial DNA or proteins, the method achieves high reliability in distinguishing viable from non-viable microorganisms, as only living cells exhibit this specific enzymatic function.
2Measurement precision
If sensitive detection methods are used to detect viable bacteria, then detection sensitivity is improved, but the complexity of the detection system increases
Solution Approach 1:
The detection system utilizes the endonuclease enzyme's inherent ability to self-cleave specific DNA sequences. The enzyme serves itself by automatically recognizing and processing its substrate without requiring complex external activation or modification systems. This self-service property simplifies the overall detection system while maintaining high sensitivity, as the enzyme's natural catalytic activity is directly harnessed for detection.
Solution Approach 2:
The detection system is segmented into distinct functional modules: the endonuclease enzyme module, the substrate DNA module, and the detection module. This segmentation allows each component to be optimized independently and simplifies the overall system architecture, making it easier to implement and maintain while achieving high detection sensitivity through the coordinated function of these modular elements.
3Productivity
If rapid bacterial detection is implemented, then detection speed is improved, but the accuracy in distinguishing viable bacteria may be compromised
Solution Approach 1:
The detection method performs preliminary action by using the endonuclease enzyme to pre-process and specifically cleave DNA from viable bacteria before the actual detection step. This preliminary enzymatic processing occurs rapidly and specifically targets only viable cells, ensuring that the subsequent detection step can proceed quickly without sacrificing accuracy, as the specificity has already been established by the enzyme's selective cleavage activity.
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 method provides a sensitive and specific means to detect viable bacteria, capable of distinguishing between living and dead bacteria, and can be adapted for on-site monitoring, offering a fast and reliable surveillance tool for production lines.
Implementation Method 1
adding a DNA substrate (6), to obtain a reaction composition, wherein said DNA substrate (6) comprises a restriction site (7) for said endonuclease (1)
Implementation Method 2
The generated products are detected after signal amplification e.g. by simple isothermal DNA techniques or PCR
Data Source
AI summary
The present invention relates to methods for determining endonuclease activity in a sample. In particular, the present invention relates to a method for determining viable pathogenic bacteria in a sample based on patterns of endonuclease activity.