Protein stability and membrane integrity

Protein stability and membrane integrity refers to fundamental physiological states and biochemical processes rather than a specific, druggable molecular target such as a receptor, enzyme, or ion channel. Protein stability is the maintenance of the correct three-dimensional conformation of proteins, a process governed by the proteostasis network, which includes molecular chaperones like HSP70 and HSP90 and degradation systems like the ubiquitin-proteasome system [1]. Membrane integrity refers to the structural wholeness and selective permeability of cellular lipid bilayers, which is vital for maintaining ion gradients and protecting cellular contents [2]. While many drugs exert their effects by modulating these properties—such as daptomycin, which disrupts bacterial membrane integrity, or tafamidis, which stabilizes the transthyretin protein—the term Protein stability and membrane integrity is too broad to be classified as a single therapeutic target [3]. It encompasses a vast array of distinct proteins and lipids, making it a description of a mechanism of action or a biological outcome rather than a discrete point of pharmacological intervention. [1] Balch, W. E., et al. (2008). Adapting Proteostasis for Disease Intervention. Science. [2] Epand, R. M. (2017). Membrane integrity and its disruption by proteins and peptides. Biochimica et Biophysica Acta (BBA) - Biomembranes. [3] Powers, E. T., et al. (2009). Biological and Chemical Approaches to Diseases of Proteostasis Deficiency. Annual Review of Biochemistry.

Not applicable as this refers to a biological process or physiological state rather than a specific molecular target.