Enzymes that catalyze the joining of either ammonia or an amide with another molecule, in which the linkage is in the form of a carbon-nitrogen bond. EC 6.3.1.

Synonyms: Ligases, Acid-Amide, Acid-Amide Ligases, EC 6.3.1.-, Ligases, Acid-Ammonia, Synthases, Amide, Acid Ammonia Ligases, Acid Amide Ligases, Acid-Ammonia Ligases, Amide Synthases