Acetyl-CoA carboxylase (ACC) is a central metabolic enzyme that catalyzes the committed step in fatty acid biosynthesis: biotin- dependent conversion of acetyl-CoA to malonyl-CoA [1]. In bacteria this protein contains a small zinc finger domain.

1: The structure of the carboxyltransferase component of acetyl-coA carboxylase reveals a zinc-binding motif unique to the bacterial enzyme. Bilder P, Lightle S, Bainbridge G, Ohren J, Finzel B, Sun F, Holley S, Al-Kassim L, Spessard C, Melnick M, Newcomer M, Waldrop GL; Biochemistry. 2006;45:1712-1722. PMID:16460018