label: 3'-deoxy-3',4'-didehydro-GTP + 5'-deoxyadenosine + L-methionine + A + H2O + H(+) => GTP + AH2 + S-adenosyl-L-methionine
label_lc: 3'-deoxy-3',4'-didehydro-gtp + 5'-deoxyadenosine + l-methionine + a + h2o + h(+) => gtp + ah2 + s-adenosyl-l-methionine