BODIPY Dye Structures for Stable Polypeptide Sequencing Labels
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Solution Overview
Problem
BODIPY dyes used for biomolecular labeling face challenges such as thermal instability, photochemical instability, photobleaching, and dye-dye interactions, limiting their effectiveness in complex biological systems, and existing synthesis methods yield low chemical quantities.
Innovation Solution
Development of novel BODIPY dyes with improved thermal and photochemical stability, designed for biomolecular labeling, and a method for sequencing polypeptides using amino acid recognition molecules that detect luminescence intensity and lifetime to identify amino acid sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional BODIPY dyes are used for biomolecular labeling, then labeling capability is achieved, but thermal stability and photochemical stability deteriorate
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of BODIPY dyes through specific substitutions at positions 1, 6, 2, and 5 of the dipyrromethene core. These structural parameter changes result in improved thermal stability (no degradation after 24 hours at 37°C) and photochemical stability (retention of >80% fluorescence intensity after 1 hour of irradiation), while maintaining synthetic accessibility through established organic chemistry methods.
2Ease of manufacture
If long spacers are used between dye and conjugated moiety, then conjugation is achieved, but dye-dye interactions increase causing quenching
Solution Approach 1:
The patent applies local quality by optimizing the spacer length to a specific range (6-10 atoms) between the dye and conjugated moiety. This localized structural adjustment prevents unwanted dye-dye interactions and quenching effects while maintaining proper conjugation, thereby preserving high luminescence intensity for detection applications.
3Adaptability or versatility
If multiple types of dyes are used in a single system, then detection versatility is improved, but spectral distinguishability becomes challenging
Solution Approach 1:
The patent applies color changes by designing multiple BODIPY dye variants with distinct spectral properties through systematic substitution patterns. The dyes exhibit well-separated absorption and emission spectra, enabling clear spectral distinguishability when used in multiplexed detection systems, thus maintaining measurement precision while achieving detection versatility.
4Ease of manufacture
If conventional BODIPY dyes are used, then labeling is achieved, but photobleaching occurs reducing sensitivity
Solution Approach 1:
The patent applies composite materials by creating enhanced BODIPY dye structures with specific substituents and spacer configurations that composite the chromophore with stabilizing groups. This results in dyes that retain >80% fluorescence intensity after 1 hour of continuous irradiation, significantly reducing photobleaching while maintaining labeling capability for sensitive biological detection.
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 novel BODIPY dyes exhibit enhanced stability and suitability for biomolecular labeling, enabling effective sequencing of polypeptides by distinguishing luminescence patterns.
Implementation Method 1
directing a series of pulses of one or more excitation energies towards a composition comprising a polypeptide, and an amino acid recognition molecule... detecting a plurality of emitted photons from the amino acid recognition molecule
Implementation Method 2
identifying the sequence of incorporated amino acid residues in the polypeptide by determining at least one of luminescence intensity and luminescence lifetime based on the emitted photons
Data Source
AI summary
Provided herein are compounds of Formula (I). Also provided herein are amino acid recognition molecules, and salts thereof, comprising at least one instance of Formula (II), and compositions thereof. Further provided herein are methods of sequencing a polypeptide using an amino acid recognition molecule, or salt thereof, comprising at least one instance of Formulae (II) or (IV).