Function
Sulfur carrier protein involved in sulfur trafficking for oxidative dissimilatory sulfur metabolism. Component of a sulfur relay system that starts with the sulfur-mobilizing rhodanese-like protein Rhd_2599 (Alvin_2599), which transfers the sulfur from a low-molecular-weight thiol, maybe glutathione, to the TusA protein (Alvin_2600); TusA serves as the sulfur donor for DsrEFH, which persulfurates DsrC; persulfurated DsrC very probably serves as a direct substrate for reverse-acting sulfite reductase, DsrAB. TusA seems to be not exclusively dedicated to sulfur oxidation and may have other important roles in the cell. Might also act as a sulfur mediator required for 2-thiouridine formation of tRNA.