Methanogen homoaconitase (EC 4.2.1.114, methanogen HACN) is an enzyme with systematic name (R)-2-hydroxybutane-1,2,4-tricarboxylate hydro-lyase ((1R,2S)-1-hydroxybutane-1,2,4-tricarboxylate-forming).
[1] This enzyme catalyses the following chemical reaction This enzyme catalyses several reactions in the pathway of coenzyme-B biosynthesis in methanogenic archaea.