thiosulfate oxidation carrier complex protein SoxZ
SoxZ forms a heterodimer with SoxY, the subunit that forms a covalent bond with a sulfur moiety during thiosulfate oxidation to sulfate. Note that virtually all proteins that have a SoxY domain fused to a SoxZ domain are functionally distinct and not involved in thiosulfate oxidation.
Jiyao W et al.(2023). "The conserved domain database in 2023.",