<small>D</small>-AlanineâÂÂ<small>D</small>-serine ligase (, VanC, VanE, VanG) is an enzyme with systematic name D-alanine:D-serine ligase (ADP-forming). This enzyme catalyses the following chemical reaction
The product of this enzyme, D-alanyl-D-serine, can be incorporated into the peptidoglycan pentapeptide instead of the usual D-alanyl-D-alanine dipeptide.