1-aminocyclopropane-1-carboxylate deaminase activity 1-aminocyclopropane carboxylic acid deaminase activity 1-aminocyclopropane-1-carboxylate aminohydrolase (isomerizing) 1-aminocyclopropane-1-carboxylate endolyase (deaminating) activity ACC deaminase activity Catalysis of the reaction: 1-aminocyclopropane-1-carboxylate + H(2)O = 2-oxobutanate + NH(4)(+). EC:3.5.99.7 GO:0008660 GO:0018806 KEGG:R00997 MetaCyc:4.1.99.4-RXN Note that this function was formerly EC:4.1.99.4. RHEA:16936 UM-BBD_reactionID:r0357 molecular_function