Manganese-containing catalase from Thermus thermophilus peroxide-induced redox transformation of manganese ions in presence of specific inhibitors of catalase …
SV Khangulov, VV Barynin… - Biochimica et Biophysica …, 1990 - Elsevier
SV Khangulov, VV Barynin, SV Antonyuk-Barynina
Biochimica et Biophysica Acta (BBA)-Bioenergetics, 1990•ElsevierThe mechanism of peroxide decomposition involves: interconvertion of two equally active
redox states:(Mn 2+, Mn 2+) and (Mn 3+, Mn 3+) states. Various inorganic anions such as
Cl− or HPO− 4 inhibit catalase activity by binding to the (Mn 2+, Mn 2+). This inhibition can
also be observed following reduction of the (Mn 3+, Mn 3+) states to (Mn 2+, Mn 2+) by
peroxide. The (Mn 3+, Mn 4+) state, which can be formed by periodate oxidation, does not
interact with these anions and is inactive in peroxide decomposition. The (Mn 2+, Mn 3+) …
redox states:(Mn 2+, Mn 2+) and (Mn 3+, Mn 3+) states. Various inorganic anions such as
Cl− or HPO− 4 inhibit catalase activity by binding to the (Mn 2+, Mn 2+). This inhibition can
also be observed following reduction of the (Mn 3+, Mn 3+) states to (Mn 2+, Mn 2+) by
peroxide. The (Mn 3+, Mn 4+) state, which can be formed by periodate oxidation, does not
interact with these anions and is inactive in peroxide decomposition. The (Mn 2+, Mn 3+) …
Abstract
The mechanism of peroxide decomposition involves: interconvertion of two equally active redox states: (Mn2+, Mn2+) and (Mn3+, Mn3+) states. Various inorganic anions such as Cl− or HPO−4 inhibit catalase activity by binding to the (Mn2+, Mn2+). This inhibition can also be observed following reduction of the (Mn3+, Mn3+) states to (Mn2+, Mn2+) by peroxide. The (Mn3+, Mn4+) state, which can be formed by periodate oxidation, does not interact with these anions and is inactive in peroxide decomposition. The (Mn2+, Mn3+) state, which forms in a minority of centers by auto-oxidation, also appears not to participate in a major way in peroxide decomposition.
Elsevier
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