Fluorescent FtsZ Probes for Gram-Negative Pathogen Visualization
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Solution Overview
Problem
Current fluorescent FtsZ probes are ineffective in targeting clinically important Gram-negative pathogens such as Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter baumannii, with limited affinity and utility in visualizing FtsZ proteins and identifying new broad-spectrum FtsZ inhibitors.
Innovation Solution
Development of novel fluorescent FtsZ probes with high affinity (Kd values in the range of 0.22 to 0.82 μM) that target FtsZ proteins from both Gram-positive and Gram-negative bacteria, enabling visualization of FtsZ and monitoring of cell division, and identification of FtsZ inhibitors using fluorescence microscopy assays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current fluorescent FtsZ probes are used, then visualization of FtsZ in Gram-positive bacteria is achieved, but affinity and effectiveness against Gram-negative pathogens is insufficient
Solution Approach 1:
The patent modifies the chemical structure of fluorescent FtsZ probes by changing parameters such as fluorophore type, linker length, and substituent groups to optimize binding affinity. The new probes exhibit Kd values of 0.22-0.82 μM across both Gram-positive and Gram-negative bacteria, representing a parameter change that resolves the contradiction between reliability for Gram-negative pathogens and broad-spectrum adaptability.
Solution Approach 2:
The invention develops fluorescent probes with universal binding capability across diverse bacterial species. The probes maintain high affinity for FtsZ proteins from both Gram-positive and Gram-negative bacteria, achieving multi-functionality that allows a single probe design to serve multiple pathogenic targets, thereby resolving the contradiction between species-specific reliability and broad-spectrum versatility.
2Measurement precision
If high affinity binding is achieved through probe modification, then visualization precision improves, but probe complexity increases
Solution Approach 1:
The patent applies local quality by making targeted modifications to specific regions of the probe molecule rather than comprehensive redesign. The fluorophore and linker regions are optimized locally to enhance binding affinity and visualization precision, while the core benzamide FtsZ inhibitor structure remains relatively simple, thus resolving the contradiction between measurement precision and device complexity.
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 new probes effectively label FtsZ in live bacterial cells, including Gram-negative pathogens, with higher affinity than previous probes, facilitating the identification of broad-spectrum FtsZ inhibitors and their mechanisms of action, and demonstrating robust binding characteristics across a range of clinically relevant bacterial species.
Implementation Method 1
Fluorescent probes for the visualization of FtsZ in gram-positive and gram-negative bacterial pathogens
Data Source
AI summary
The invention provides a compound of formula I:or a salt thereof, wherein Y, Z, L, and W have any of the values described in the specification, as well as compositions comprising a compound of formula I or a salt thereof. The compounds are useful as tools for visualizing FtsZ and monitoring cell division in a broad range of Gram-positive and Gram-negative bacterial pathogens of acute clinical importance and for identifying new FtsZ inhibitors.