Function
Catalyzes the oxidation of sulfides, such as hydrogen sulfide, with the help of a quinone. Has the highest activity with caldariella quinone and decylubiquinone, and lower activity with naphtoquinones. Consecutive reaction cycles lead to the accumulation of a polysulfide product on the active site Cys residues; these products are released when they exceed a critical length, typically as cyclooctasulfur.
Sequence
MTKVLVLGGRFGALTAAYTLKRLVGSKADVKVINKSRFSYFRPALPHVAIGVRDVDELKVDLSEALPEKGIQFQEGTVEKIDAKSSMVYYTKPDGSMAEEEYDYVIVGIGAHLATELVKGWDKYGYSVCEPEFATKLREKLESFQGGNIAIGSGPFYQGHNPKPKVPENFVPNADSACEGPVFEMSLMLHGYFKKKGMLDKVHVTVFSPGEYLSDLSPNSRKAVASIYNQLGIKLVHNFKIKEIREHEIVDEKGNTIPADITILLPPYTGNPALKNSTPDLVDDGGFIPTDLNMVSIKYDNVYAVGDANSMTVPKLGYLAVMTGRIAAQHLANRLGVPTKVDKYYPTIMCVADNPYEGYAVSVKDDTWYGGTVSIADPAAVNHLKKELFTKYYMWTKGDMALEKFLASW