PA5339, a RidA Homolog, Is Required for Full Growth in Pseudomonas aeruginosa

Abstract

RidA is a widely conserved protein that prevents endogenous metabolic stress caused by 2-aminoacrylate (2AA) damage to pyridoxal 5′-phosphate (PLP)-dependent enzymes in prokaryotes and eukaryotes. The framework for understanding the accumulation of 2AA and its consequences have largely been defined in Salmonella enterica . We show here that in P. aeruginosa (PAO1), 2AA accumulation leads to reduced growth, compromised motility, and defective biofilm formation. This study expands our knowledge how the metabolic architecture of an organism contributes to the consequences of 2AA inactivation of PLP-dependent enzymes and identifies a key RidA protein in P. aeruginosa .