Perfluorinated Detergents for Membrane Protein Extraction

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Solution Overview

Problem

Current detergents struggle to efficiently solubilize and stabilize membrane-proteins, often requiring sequential use of solubilizing and stabilizing agents, and existing fluorinated detergents like F6OM exhibit low extraction yields and limited applicability.

Innovation Solution

Development of new perfluorinated detergents with specific polar and perfluorinated moieties, such as maltoside, lactobionamide, or sulfobetaine linked through aliphatic and perfluorinated cycloalkyl chains, which effectively solubilize and stabilize membrane-proteins like Bacteriorhodopsin and FhuA.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If classical detergents with strong delipidating nature are used, then solubilization of membrane-proteins is achieved, but stabilization of membrane-proteins is compromised

Engineering Contradiction:

Improvesolubilization efficiencyVSAvoidmembrane-protein stabilization

Core Design Contradiction:

Quantity of substanceVSStability of the object's composition

Solution Approach 1:

The patent modifies the chemical parameters of detergents by introducing perfluorinated chains with specific lengths (C4-C12) and cyclic structures, changing the delipidating strength from strong to moderate. This parameter change enables the detergent to simultaneously solubilize and stabilize membrane-proteins without requiring sequential use of different detergents.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates composite detergent molecules combining polar head groups (maltoside, glucoside, sulfobetaine) with perfluorinated alkyl chains and cyclic structures. This composite structure integrates both solubilization capability (from the polar head) and stabilization capability (from the moderate delipidating perfluorinated chain), resolving the contradiction between strong solubilization and protein stabilization.

Inventive Principle:

Principle #40Composite materials

2Quantity of substance

If fluorinated detergent F6OM is used, then solubilization of lipid vesicles is achieved, but extraction yield is low

Engineering Contradiction:

Improvesolubilization capabilityVSAvoidextraction yield

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The patent systematically varies key parameters of the fluorinated detergent structure: extending the perfluorinated chain length from C6 to C8-C12, introducing cyclic structures (cyclohexyl, adamantyl), and modifying the polar head group. These parameter changes enhance the detergent's effectiveness, increasing extraction yield from low levels to >90% for various membrane-proteins while maintaining solubilization capability.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If existing detergents are used, then extraction of certain membrane-proteins is achieved, but applicability to other membrane-proteins is limited

Engineering Contradiction:

Improvedetergent applicabilityVSAvoidextraction efficiency for specific proteins

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent develops a series of perfluorinated detergents with varying chain lengths (C4-C12) and structures that can universally extract diverse membrane-proteins including Bacteriorhodopsin, FhuA, and others that were previously difficult to extract. The modular structure allows selection of optimal detergent for specific applications while maintaining broad applicability across different protein types.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

These new detergents demonstrate improved solubilization and stabilization capabilities compared to existing detergents, offering higher extraction yields and broader applicability to membrane-proteins, including those not previously well-extracted.

Implementation Method 1

Extraction of a membrane-protein comprises its solubilization, which enables the membrane-protein to be isolated from the cell membrane

Methodology Applied

Scientific EffectSolubilization: Solvation

Implementation Method 2

Due to their delipidating nature, classical detergents (or surfactants) are commonly used for extracting membrane-proteins

Methodology Applied

Scientific EffectDelipidating:

Implementation Method 3

its stabilization which aims at maintaining its native structure and function

Methodology Applied

Scientific EffectStabilization:

Data Source

PatentUS20240247207A1Maltoside-, lactobionamide-, monoglucoside-, branched diglucoside-, sulfobetaine-, sulfate- or aminooxide-based perfluorinated detergents and their use in membrane-proteins applications

Publication Date: 2024.07.25 AVIGNON UNIV

AI summary

The present invention relates to new amphiphilic perfluorinated compounds and their use as a detergent for extracting membrane-proteins or synthesizing membrane-proteins in acellular system. It also relates to a method for extracting a membrane-protein from a biological sample using such compounds.