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Protein Membrane Overlay Assay: A Protocol to Test Interaction Between Soluble and Insoluble Proteins in vitro

Protein Membrane Overlay Assay: A Protocol to Test Interaction Between Soluble and Insoluble Proteins in vitro

Published on: August 14, 2011

Measuring and increasing protein solubility.

Saul R Trevino¹, J Martin Scholtz, C Nick Pace

¹Department of Molecular and Cellular Medicine, Texas A&M University System Health Science Center, College Station, Texas 77843-1114, USA.

Journal of Pharmaceutical Sciences

|February 2, 2008

Summary

Improving protein solubility is key for developing effective protein pharmaceuticals. This review highlights strategies for enhancing protein solubility, particularly by modifying specific hydrophilic residues, aiding in formulation development.

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Solubility of Hydrophobic Compounds in Aqueous Solution Using Combinations of Self-assembling Peptide and Amino Acid

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Published on: September 20, 2017

Area of Science:

Biochemistry and Pharmaceutical Sciences
Protein Engineering and Formulation

Background:

High concentration protein delivery is hindered by low protein solubility, impacting pharmaceutical development.
Understanding and overcoming low solubility is crucial for formulating protein-based therapeutics.

Purpose of the Study:

To review types of protein low solubility relevant to pharmaceuticals.
To discuss methods for measuring protein solubility.
To explore strategies for increasing protein solubility, focusing on site-directed mutagenesis.

Main Methods:

Review of literature on protein solubility and formulation.
Discussion of solubility measurement techniques, including ammonium sulfate precipitation.
Analysis of site-directed mutagenesis strategies for solubility enhancement.

Main Results:

Certain hydrophilic residues (aspartic acid, glutamic acid, serine) significantly improve protein solubility.
Other hydrophilic residues (asparagine, glutamine, threonine, lysine, arginine) are less favorable for solubility.
Identification of favorable hydrophilic residues for targeted modification.

Conclusions:

Site-directed mutagenesis targeting specific hydrophilic residues offers a viable strategy to increase protein solubility.
This approach is particularly useful when protein structure is unknown.
Modifying unfavorable hydrophilic residues with favorable ones can enhance protein solubility for pharmaceutical applications.