Legal but lethal: functional protein aggregation at the verge of toxicity

Area of Science:

• Molecular Biology
• Neuroscience
• Cell Biology

Background:

• Protein aggregation is a hallmark of neurodegenerative disorders, typically associated with cellular toxicity and damage.
• Emerging evidence suggests that protein aggregation can also fulfill essential physiological functions, exemplified by prions.
• While initially viewed as solely toxic, many proteins exhibit prion-like properties for organized polymerization into functional complexes.

Purpose of the Study:

• To review the strategies employed by living organisms to maintain beneficial protein aggregation.
• To explore mechanisms preventing the detrimental accumulation of toxic protein aggregates.

Main Methods:

• Literature review of studies on protein aggregation in various organisms.
• Analysis of cellular and molecular mechanisms governing protein polymerization.
• Examination of prion biology and prion-like protein behavior.

Main Results:

• Cells can tolerate the accumulation of potentially harmful protein aggregates for functional benefits.
• Organisms possess distinct strategies to differentiate between beneficial and detrimental protein aggregation.
• Prion-like attributes are utilized by various proteins for organized physiological roles.

Conclusions:

• Protein aggregation is a complex biological process with both pathological and physiological implications.
• Understanding the balance between beneficial and toxic aggregation is crucial for neurodegenerative disease research.
• Cellular mechanisms exist to harness protein aggregation for functional advantage, challenging the solely detrimental view.