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. Is able to catalyze the sulfur transfer reaction from thiosulfate or glutathione (GSSH) to cyanide in vitro, however, thiosulfate is unlikely an in vivo substrate.