Fluorescent Separase Sensor for Cell Division Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The timing and mechanism of separase activation during cell division are not well understood, making it difficult to analyze chromosomal segregation and develop effective anticancer strategies, as chromosomal instability is a key factor in cancer progression.
Innovation Solution
A separase sensor is developed with fluorescent proteins at both ends of a pseudo-substrate sequence containing separase cleavage sites, allowing visualization of separase activity by detecting changes in fluorescence upon activation, enabling the determination of activation timing and location within living cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional biochemical analysis methods are used to study separase activation, then detailed molecular mechanisms can be obtained, but the timing and location of separase activation during the rapid 60-second cell division process cannot be captured
Solution Approach 1:
The patent replaces traditional biochemical analysis methods with a fluorescence-based optical sensing system. The separase sensor uses fluorescent proteins (FRET pairs) to detect separase activation in real-time within living cells, allowing precise temporal and spatial measurement of separase activity during the rapid mitotic process without requiring cell lysis or biochemical extraction.
Solution Approach 2:
The patent introduces a fluorescent sensor molecule as an intermediary that reports separase activity. The sensor contains a separase cleavage site flanked by fluorescent proteins, serving as a molecular mediator that converts separase proteolytic activity into a detectable fluorescence signal, enabling indirect observation of separase activation timing and location.
2Loss of information
If separase activity is visualized in living cells, then real-time activation timing and location can be determined, but the complexity of the sensor construction and fluorescence measurement system increases
Solution Approach 1:
The fluorescent sensor design serves multiple functions simultaneously: the fluorescent protein tags enable localization tracking, the FRET pair configuration provides activation detection, and the separase cleavage site provides substrate specificity. This multi-functionality reduces the need for separate experimental systems for localization and activity measurement.
Solution Approach 2:
The patent utilizes fluorescence wavelength changes (color changes) as a readout mechanism. The FRET pair emits different wavelengths of fluorescence before and after separase cleavage, providing a simple optical signal that indicates separase activation status without requiring complex detection equipment or multiple sensors.
3Reliability
If overexpression of separase is used to study its function, then chromosomal instability and canceration can be induced, but the normal regulatory control of separase activation is disrupted
Solution Approach 1:
The patent employs a feedback mechanism where the fluorescent sensor itself reports separase activity levels in real-time. This allows researchers to monitor separase activation and adjust experimental conditions to maintain proper chromosomal segregation control, preventing the chromosomal instability that would result from uncontrolled separase overexpression.
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 separase sensor allows for sensitive visualization and quantification of separase activation, providing insights into chromosomal segregation mechanisms and facilitating the screening of anticancer agents targeting separase molecules.
Implementation Method 1
Two types of fluorescent substances different in fluorescence wavelength are disposed at both ends of an amino acid sequence containing a separase cleavage site and a localization-targeting sequence
Data Source
AI summary
Problem to be SolvedAn object of the present invention is to provide a separase sensor for visualizing separase activity in a living cell. Another object is to develop a function analysis system of cell division using the separase sensor and further obtain a simple screening method for an anticancer agent.SolutionThe separase sensor of the present invention has two types of fluorescent proteins different in fluorescence wavelength at both ends of an amino acid sequence containing a separase cleavage site and a localization-targeting sequence targeting to a specific site within a cell. Since timing of activating separase and location of separase in a cell can be specified by use of the sensor, cell division can be analyzed and an anticancer agent can be screened.