Oxygen effects in aqueous solutions of laccases: Absorption spectra and reactivity |
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| Authors: | A A Revina G I Khaikin E L Protasova N B Mezentseva E V Stepanova O V Skorobogat'ko |
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| Institution: | (1) A. N. Frumkin Institute of Electrochemistry, Russian Academy of Sciences, 31 Leninsky prosp., 117071 Moscow, Russian Federation;(2) A. N. Bach Institute of Biochemistry, Russian Academy of Sciences, 33 Leninsky prosp, 117071 Moscow, Russian Federation |
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| Abstract: | The optical absorption spectra of laccases in aqueous solutions were found to undergo reversible changes in the presence of
O2. It was suggested that dioxygen is coordinated in the active center of the completely oxidized native enzyme. Abnormal behavior
of superoxide radical anions upon variation of the laccase concentration was found by pulse radiolysis.
Published inIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1471–1474, August, 2000. |
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| Keywords: | laccases molecular oxygen electron transfer optical absorption spectrum pulse radiolysis superoxide radical anion |
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