5-methylsulfanyl-2,3-dioxopentyl phosphate + O2 + H2O => 4-methylsulfanyl-2-oxobutanoate + formate + phosphate + 2 H(+)
5-methylsulfanyl-2,3-dioxopentyl phosphate + o2 + h2o => 4-methylsulfanyl-2-oxobutanoate + formate + phosphate + 2 h(+)