1.7.2.3 physiological function subunit TorA is essential for underpinning the improved pressure tolerance of Vibrio fluvialis -, 764748 1.7.2.3 physiological function trimethylamine oxide respiration is catalyzed by the TorECAD operon. TorD is the putative specific chaperone of terminal reductase TorA and TorC is c-type cytochrome. The absence of TorD drastically affects the stability of TorA, while the absence of TorE does not affect TorA stability or activity. TMAO reduction is affected in the TorE deletion mutant. Presence of TorE confers a selective advantage in competitive environments 743776