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EC Number
Metals/Ions
Commentary
Reference
Mn2+
The transferase activity of levansucrase in the reaction mixture supplemented with Mn2+ is 100% higher than the enzyme activity in medium without metal ions, the hydrolytic activity of the levansucrase is lowered by 80%
Co2+
slightly activating
more
not affected by 5 mM of Ba2+, Zn2+, Hg2+, Ni2+, Mn2+, Cu2+, Co2+, Ca2+, Na2MoO4
Ca2+
Mg2+, Zn2+, Mn2+, Fe2+ have no effect
more
enzyme activities of free and immobilized enzymes are not affected by Ca2+
Ca2+
dependent on for tertiary structure, can partially be replaced by Sr2+, not Mg2+, Sr2+, Ba2+, and Mn2+
Fe3+
dependent on for tertiary structure, can partially be replaced by Sr2+, not Mg2+, Ba2+, and Mn2+
Ca2+
Ca2+ play an important structural role. At 45C the mutant enzymes D500A and D500N are inactive in the absence of Ca2+ ions, with, respectively, 15% and 45% of wild-type activity remaining in the presence of 1 mM Ca2+. In the presence of 1 mM Ca2+ mutant enzymes display highest activity at 40C. In the absence of Ca2+ ions, the optimal temperature is 30C; stimulates activity, Asp500 residues play an important role in Ca2+ binding
Ca2+
activates, recombinant enzyme
Co2+
activates strongly, recombinant enzyme
Results 1 - 10 of 15 > >>