Any process that activates or increases the frequency, rate or extent of ligase activity, the catalysis of the ligation of two substances with concomitant breaking of a diphosphate linkage, usually in a nucleoside triphosphate.
positive regulation of lyase activity +
positive regulation of oxidoreductase activity +
positive regulation of transferase activity +
regulation of aminoacyl-tRNA ligase activity +
regulation of DNA ligase activity +
regulation of glutamate-cysteine ligase activity +
regulation of proton-transporting ATP synthase activity, rotational mechanism +