Reaction catalyzed by molybdopterin synthase sulfurtransferase (2.8.1.11)

+

=

AMP

+

+

[molybdopterin-synthase sulfur-carrier protein]-Gly-Gly-AMP

+

[cysteine desulfurase]-S-sulfanyl-L-cysteine

=

AMP

+

[molybdopterin-synthase sulfur-carrier protein]-Gly-NH-CH2-C(O)SH

+

cysteine desulfurase