Aminoacyl-tRNA Synthetases in the Bacterial World

Area of Science:

• Biochemistry
• Molecular Biology
• Genetics

Background:

• Aminoacyl-tRNA synthetases (aaRSs) are conserved enzymes crucial for translating genetic code.
• Beyond translation, some aaRSs perform additional cellular functions.
• Significant structural and functional diversity exists among aaRSs across life's domains.

Purpose of the Study:

• To review bacterial aaRSs, including their structure, function, regulation, and evolution.
• To emphasize structure-function relationships, enzymology, and error-correction mechanisms.
• To explore alternative functions of aaRSs and their paralogs in various cellular processes.

Main Methods:

• Genomic and X-ray crystallography data analysis.
• Review of accumulated scientific literature over the past two decades.
• Comparative analysis of aaRS properties across bacteria, archaea, and eukaryotes.

Main Results:

• Bacterial aaRSs exhibit diverse structures, modularity, and regulatory mechanisms.
• Non-discriminating aaRSs are present in bacteria, compensating for missing specific synthetases.
• Alternative functions of aaRSs and their paralogs in cell wall biogenesis and metabolism were identified.

Conclusions:

• Bacterial aaRSs display significant plasticity and kingdom-specific idiosyncrasies.
• The field has shifted towards integrated approaches, utilizing vast genomic and structural data.
• Comparative analysis reveals conserved and distinct features of aaRSs across the three domains of life.