FRET Probe for Live Cell Cu(I) Detection
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Solution Overview
Problem
There is a need for compositions and methods to detect copper in live cells, particularly for detecting Cu(I) in labile copper pools, as copper dysregulation is associated with various diseases.
Innovation Solution
The development of Förster resonance energy transfer (FRET)-based probes, such as FCP-1, which allows for the detection of Cu(I) in live cells by measuring changes in the FRET emissions ratio upon interaction with Cu(I).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional copper detection methods are used, then copper can be detected in cell extracts, but the method cannot detect copper in live cells and requires cell lysis
Solution Approach 1:
The patent introduces a FRET-based probe as an intermediary molecule that selectively interacts with Cu(I) in live cells. The probe contains a FRET donor and acceptor pair whose energy transfer efficiency changes upon Cu(I) binding, enabling detection without cell lysis. This intermediary approach allows copper detection while maintaining cell integrity and avoiding the complexity of extraction procedures.
2Measurement precision
If FRET-based probes are used to detect Cu(I), then copper can be detected in live cells, but the probe must be designed with specific FRET donor and acceptor groups
Solution Approach 1:
The patent describes a universal FRET probe design framework where the core structure consists of a FRET donor, FRET acceptor, and Cu(I)-binding group. This modular design allows the same probe architecture to detect copper across different cell types and conditions. The universal design simplifies manufacturing by reducing the need to create entirely new probes for each application, while maintaining high measurement precision through the consistent FRET mechanism.
3Quantity of substance
If the probe detects total copper, then all copper in the cell can be measured, but the method cannot distinguish between labile and tightly-bound copper pools
Solution Approach 1:
The patent applies local quality by designing the probe to selectively interact with Cu(I) in the labile copper pool rather than detecting all copper forms. The FRET probe's molecular structure and binding kinetics are optimized to preferentially bind to freely available Cu(I), while excluding tightly-bound copper in metalloproteins. This selective interaction enables precise differentiation between copper pools, with the FRET signal reflecting only the labile fraction.
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 FRET-based probes enable accurate detection and quantification of Cu(I) in labile copper pools within live cells, providing insights into copper dynamics and potential dysregulation associated with diseases.
Implementation Method 1
The present disclosure provides Förster resonance energy transfer (FRET)-based probes for detecting copper, e.g., for detecting Cu(I) in live cells
Data Source
AI summary
The present disclosure provides Forster resonance energy transfer (FRET)-based probes for detecting copper, e.g., for detecting Cu(I) in live cells. The present disclosure provides methods for detecting copper, e.g., for detecting Cu(I) in live cells, using a FRET-based probe of the present disclosure.