Protein Solubilization
Protein Solubilization - Related Videos
10:43
Expression, Detergent Solubilization, and Purification of a Membrane Transporter, the MexB Multidrug Resistance Protein
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Cited by 5 •
2010
In this protocol we demonstrate the expression, solubilization, and purification of a recombinantly expressed membrane protein, MexB, as a soluble protein detergent complex. MexB is a multidrug resistance membrane transporter from the opportunistic bacterial pathogen Pseudomonas aeruginosa.
02:23
Visualizing the Effect of pH on Solubilization of the Influenza A Viral Core
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2026
Source: Stauffer, S. et al., In Vitro Disassembly of Influenza A Virus Capsids by Gradient Centrifugation. J. Vis. Exp. (2016)This video demonstrates the effect of pH on the solubilization of influenza A viral cores. Gel electrophoresis and protein staining reveal the progressive disassembly of the core structure under acidic conditions.
03:05
Fluorescence-Detection Size-Exclusion Chromatography: A Technique to Identify the Integrity of Fluorescent Membrane Proteins upon Detergent Solubilization
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2025
In this video, we demonstrate a fluorescence-detection size-exclusion chromatography technique to screen for green fluorescent protein (GFP)-fused membrane protein stability in Escherichia coli following detergent solubilization. Proteins exhibiting a symmetrical peak in the size-exclusion profile with little or no free GFP indicate purified proteins with minimum degradation and aggregation, which can subsequently be selected for structure-function analysis.
06:12
Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs
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Cited by 2 •
2021
This article reports a simple method to isolate the outer and inner perivitelline sublayers of chicken eggs while minimizing structural alteration and to optimize protein solubilization of each sublayer for proteomic analyses.
08:46
Green Fluorescent Protein-based Expression Screening of Membrane Proteins in Escherichia coli
0 Views •
Cited by 34 •
2015
A streamlined approach to screening for the expression of recombinant membrane proteins in Escherichia coli based on fusion to green fluorescent protein is presented.
FAQs
Changing pH or ionic strength can weaken protein-protein interactions that promote aggregation, allowing more protein to remain dispersed in solution. However, the selected conditions must balance improved recovery with preservation of structure and activity. In practice, researchers adjust these variables according to whether the priority is maximizing soluble protein, maintaining native properties, or preparing a compatible sample for later analysis.
Detergents and chaotropic agents address interactions that ordinary aqueous conditions may not overcome. Detergents can weaken hydrophobic interactions, which is particularly relevant when proteins contain hydrophobic regions, while chaotropic agents help disrupt stabilizing interactions within or between proteins. Their use can improve accessibility for analysis, but excessive disruption may increase denaturation or reduce biological activity.
A condition that releases more protein into solution may also alter its structure or encourage unwanted aggregation after extraction. Effective preparation therefore considers both the amount recovered and whether the protein remains accessible, stable, and biologically functional. This balance determines whether the resulting sample is suitable for structural or functional studies rather than only for measuring total protein presence.
Sample preparation should begin by selecting aqueous conditions that limit protein-protein interactions while matching the intended downstream method. Researchers can then adjust pH, ionic strength, temperature, or include detergents and chaotropic agents when needed. The resulting preparation should be evaluated for protein recovery, aggregation, accessibility, and retained activity before proceeding to analytical workflows.
Solubilization prepares proteins to remain dispersed and accessible during downstream separation or detection. For electrophoresis, chromatography, and mass spectrometry, this improves the likelihood that extracted proteins enter the analytical workflow rather than being lost through aggregation or incomplete recovery. Conditions must also be selected with the intended technique in mind so the preparation supports reliable analysis.
The process is especially important when extracting proteins from cells or tissues and when studying proteins that are difficult to keep in aqueous solution, including membrane proteins. It also supports investigations of protein structure and biochemical function. By improving recovery and accessibility, suitable preparation enables researchers to examine biological samples with electrophoresis, chromatography, or mass spectrometry.