Protein-Particle Conjugates for Single-Molecule Detection
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Solution Overview
Problem
Existing technologies face challenges in efficiently capturing and manipulating proteins for individual detection or manipulation, as proteins cannot be amplified like DNA and their chemical complexity complicates efforts to achieve scales comparable to genomic platforms.
Innovation Solution
A method involving attaching particles to proteins through reactive moieties, using nucleic acid linkers and converting their conformation to inhibit multiple attachments, allowing for one-to-one particle-protein conjugates, facilitating individual manipulation and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If DNA amplification techniques are used for protein detection, then signal amplification is achieved, but the technique is not applicable to proteins due to their chemical complexity and inability to be amplified like DNA
Solution Approach 1:
The patent introduces DNA as an intermediary molecule to bridge the gap between protein detection and amplification capabilities. Proteins are captured and attached to magnetic beads, then DNA barcodes are hybridized to the beads, enabling the use of DNA amplification techniques indirectly for protein quantification without requiring direct protein amplification
2Productivity
If multiple particles attach to a single protein, then capture efficiency increases, but individual protein manipulation and detection accuracy deteriorates
Solution Approach 1:
The patent segments the capture system into distinct functional components: magnetic beads for capture, DNA barcodes for identification, and controlled hybridization conditions for stoichiometric attachment. This segmentation enables precise control over the number of particles per protein, ensuring one-to-one correspondence for accurate individual protein manipulation and detection
Solution Approach 2:
The patent changes the physical and chemical parameters of the particles (magnetic beads) and the bonding mechanism (DNA hybridization conditions) to control attachment stoichiometry. By adjusting hybridization temperature, salt concentration, and DNA barcode concentration, the system achieves controlled single-attachment while maintaining high capture efficiency
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
Enables the individual manipulation and detection of proteins, even in complex samples, by ensuring each protein is attached to a single particle, enhancing processing efficiency and reducing interference.
Implementation Method 1
reacting a first reactive moiety of a protein in the reaction mixture with a second reactive moiety of a particle in the reaction mixture to attach the protein to the particle via a bond formed between the first reactive moiety of the protein and the second reactive moiety of the particle
Implementation Method 2
a single stranded nucleic acid linker attaches each of the particles to a second reactive moiety
Data Source
AI summary
Provided herein are methods, compositions and apparatus useful for individually manipulating and individually detecting analytes such as proteins. Analytes can be attached to particles to facilitate individual manipulation or detection of the particle-attached analytes. The particle-attached analytes can be composed of a single analyte attached to a single particle, such that no more than one analyte is attached per particle and no more than one particle is attached per analyte.