Elucidation of the factors affecting the oxidative activity of Acremonium sp. HI-25 ascorbate oxidase by an electrochemical approach

Journal Article · Fri Mar 07 00:00:00 EST 2008 · Biochemical and Biophysical Research Communications

DOI:https://doi.org/10.1016/j.bbrc.2007.12.159· OSTI ID:21043647

Murata, Kenichi ^[1]; Nakamura, Nobuhumi ^[1]; Ohno, Hiroyuki ^[1]

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1. Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588 (Japan)

Steady-state kinetics of Acremonium sp. HI-25 ascorbate oxidase toward p-hydroquinone derivatives have been examined by using an electrochemical analysis based on the theory of steady-state bioelectrocatalysis. The electrochemical technique has enabled one to examine the influence of electronic and chemical properties of substrates on the activity. It was proven that the oxidative activity of ascorbate oxidase was dominated by the highly selective substrate-binding affinity based on electrostatic interaction beyond the one-electron redox potential difference between ascorbate oxidase's type 1 copper site and substrate.

• OSTI ID: 21043647
• Journal Information: Biochemical and Biophysical Research Communications, Vol. 367, Issue 2; Other Information: DOI: 10.1016/j.bbrc.2007.12.159; PII: S0006-291X(07)02820-3; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0006-291X
• Country of Publication: United States
• Language: English

Related Subjects

60 APPLIED LIFE SCIENCES
CHEMICAL PROPERTIES
COPPER
ELECTROCHEMISTRY
OXIDASES
OXIDATION
REDOX POTENTIAL
STEADY-STATE CONDITIONS
SUBSTRATES