1.2.1.46 Ca2+ is required for the stabilization of the tetrameric structure of dlFalDH and for its optimal functionality 690569 1.2.1.46 Ca2+ plays an important role in the active centre of DL-FDH and for the sensing purpose 690106 1.2.1.46 Cu2+ the protein contains 1.3 mol of Cu2+. The highest activity, 22fold increase, is found in the protein produced in the presence of 0.025 mM Cu2+ 762739 1.2.1.46 Fe2+ a 20fold increase in activity is found in the protein produced in the presence of 0.025 mM Fe2+ 762739 1.2.1.46 additional information independent of Mg2+ 288246 1.2.1.46 additional information the presence or absence of metal ions (0.1 mM) in the reaction mixture does not affect the enzyme activity 762739 1.2.1.46 Zinc active-site zinc-liganding amino acids: Cys-47 and His-68 288253 1.2.1.46 Zinc structural zinc-liganding amino acids: Cys-97, Cys-100, Cys-103, Cys-111 288253 1.2.1.46 Zinc zinc metalloenzyme, 2 zinc atoms per subunit, one participates in catalytic activity, the other is involved in maintaining the native conformation of the enzyme 288250 1.2.1.46 Zn2+ - 667724 1.2.1.46 Zn2+ contains zinc 762614, 763486 1.2.1.46 Zn2+ required 741521, 743745 1.2.1.46 Zn2+ the protein contains 1.5 mol of Zn2+. An increase in activity is found in the protein produced in the presence of 0.025 mM Zn2+ 762739 1.2.1.46 Zn2+ two ions bound per subunit 655673, 656507