Essential bacterial proteins

Essential bacterial proteins are a diverse group of proteins encoded by genes that are indispensable for the survival, growth, and reproduction of bacteria under optimal conditions (Gerdes et al., 2003). These proteins are involved in fundamental biological processes, including DNA replication, RNA transcription, protein translation, cell wall synthesis, and basic metabolic pathways (Zhang & Lin, 2009). Because these proteins are critical for bacterial viability and often differ significantly from their eukaryotic counterparts, they serve as the primary targets for most existing and experimental antibiotic classes (Silver, 2011). Targeting these proteins allows for selective toxicity, aiming to eradicate pathogenic bacteria while minimizing harm to the human host (Walsh, 2003). However, the broad nature of this category encompasses thousands of distinct molecular targets across various bacterial species, making it a collective term rather than a specific therapeutic target (Silver, 2011). Examples of specific targets within this group include DNA gyrase, RNA polymerase, and the 30S and 50S ribosomal subunits (Kohanski et al., 2010). The ongoing evolution of bacterial genomes and the rise of multi-drug resistance continue to drive the search for novel essential proteins that can be exploited for future antimicrobial therapy (Ventola, 2015).

Other names

Essential genesBacterial core proteomeMinimal gene setEssential bacterial gene products

Antibiotics targeting essential bacterial proteins function by inhibiting vital cellular processes; for example, beta-lactams inhibit cell wall synthesis by binding penicillin-binding proteins, fluoroquinolones inhibit DNA replication by targeting DNA gyrase and topoisomerase IV, and macrolides inhibit protein synthesis by binding to the 50S ribosomal subunit (Kohanski et al., 2010; Walsh, 2003).