Bacterial protein acetylation: mechanisms, functions, and methods for study.

Area of Science:

• Biochemistry
• Molecular Biology
• Microbiology

Background:

• Lysine acetylation is an evolutionarily conserved post-translational modification affecting protein function.
• It plays critical roles in diverse cellular processes including metabolism, gene regulation, and virulence.
• Acetylation can alter protein DNA binding, enzymatic activity, interactions, stability, and localization.

Purpose of the Study:

• To review current knowledge on lysine acetylation mechanisms in bacteria.
• To discuss the functional implications of acetylation in bacterial metabolism, pathogenicity, stress response, and translation.
• To highlight methods for studying bacterial acetylation, including quantification techniques and genetic code expansion.

Main Methods:

• Review of existing literature on lysine acetylation in prokaryotes.
• Analysis of acetylation mechanisms, including enzymatic (by lysine acetyltransferases - KATs) and chemical pathways.
• Discussion of quantification methods (relative and stoichiometry) and genetic code expansion tools (CGE).

Main Results:

• Lysine acetylation is mediated by KATs using acetyl-CoA or acetyl phosphate as donors.
• Lysine deacetylases (KDACs) are responsible for removing acetyl groups.
• KATs, particularly GNAT superfamily members, are found in prokaryotes and eukaryotes with diverse substrate specificities.
• Acetylation impacts bacterial physiology, including metabolism, virulence, stress response, and translation.
• Emerging roles in the gut microbiome are also discussed.

Conclusions:

• Lysine acetylation is a fundamental regulatory mechanism in bacteria with broad functional impacts.
• Understanding acetylation is key to deciphering bacterial physiology, pathogenicity, and host interactions.
• Advanced methods are crucial for further elucidating the biological significance of protein acetylation in bacteria.