Calorie restriction alters mitochondrial protein acetylation

Area of Science:

• Biochemistry
• Molecular Biology
• Gerontology

Background:

• Calorie restriction (CR) is a well-established intervention that extends lifespan across diverse organisms.
• Mitochondrial adaptation is a critical cellular response to CR, but the underlying molecular mechanisms remain largely unknown.

Purpose of the Study:

• To investigate the role of protein acetylation in mitochondrial adaptation during calorie restriction.
• To identify specific mitochondrial proteins and metabolic pathways affected by altered acetylation under CR.

Main Methods:

• Large-scale mass spectrometry was employed to screen mitochondrial proteins for changes in lysine acetylation.
• Proteins with altered acetylation during CR were identified across different tissues.

Main Results:

• Lysine acetylation of mitochondrial proteins was found to be altered in a tissue-specific manner during CR.
• Seventy-two candidate proteins involved in various metabolic pathways exhibited altered acetylation patterns under CR.
• These proteins are implicated in crucial cellular functions and metabolic processes.

Conclusions:

• Mitochondrial protein acetylation is dynamically regulated by calorie restriction.
• Altered mitochondrial acetylation is a significant component of the CR response and may contribute to its pro-longevity effects.
• These findings provide novel molecular insights into the mechanisms of aging and lifespan extension.