[LarE protein]-L-cysteine + pyridinium-3-carboxylate-5-thiocarboxylate mononucleotide + ATP <=> pyridinium-3,5-bisthiocarboxylate mononucleotide + [LarE protein]-dehydroalanine + AMP + diphosphate + H(+)
[lare protein]-l-cysteine + pyridinium-3-carboxylate-5-thiocarboxylate mononucleotide + atp <=> pyridinium-3,5-bisthiocarboxylate mononucleotide + [lare protein]-dehydroalanine + amp + diphosphate + h(+)