Catalysis of the reaction: 2 S-adenosyl-L-methionine + a [ribosomal protein S12] L-aspartate89 + a sulfurated [sulfur carrier] + a reduced electron acceptor = S-adenosyl-L-homocysteine + L-methionine + 5'-deoxyadenosine + 2 H+ + a [ribosomal prote
"Catalysis of the reaction: 2 S-adenosyl-L-methionine + a [ribosomal protein S12] L-aspartate89 + a sulfurated [sulfur carrier] + a reduced electron acceptor = S-adenosyl-L-homocysteine + L-methionine + 5'-deoxyadenosine + 2 H+ + a [ribosomal prote"@en