Menaquinol oxidase (H+-transporting)

Menaquinol oxidase (H+-transporting) (, cytochrome aa3-600 oxidase) is an enzyme with systematic name menaquinol:O2 oxidoreductase (H+-transporting). This enzyme catalyses the following chemical reaction


 * 2 menaquinol + O2 $$\rightleftharpoons$$ 2 menaquinone + 2 H2O

Cytochrome aa3-600, one of the respiratory oxidases from Bacillus subtilis, is a member of the heme-copper family of oxygen reductases.