Electron Transfer Kinetics between PQQ-dependent Soluble Glucose Dehydrogenase and Mediators

Steady-state kinetic parameters between PQQ-dependent soluble glucose dehydrogenase (PQQ-sGDH) and mediators were evaluated based on a theory of bioelectrocatalysis. Quinones showed bi-molecular reaction constants in the order of 1010 M−1 s−1 as the limiting values, while the values of Os-complexes...

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Bibliographic Details
Published in:Denki kagaku oyobi kōgyō butsuri kagaku 2006/08/05, Vol.74(8), pp.639-641
Main Authors: OKUMURA, Noriko, ABO, Tomohiko, TSUJIMURA, Seiya, KANO, Kenji
Format: Article
Language:English
Subjects:
Bioelectrocatalysis
Long-range Electron Transfer
Os-complex
PQQ-sGDH
Quinone
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Summary:Steady-state kinetic parameters between PQQ-dependent soluble glucose dehydrogenase (PQQ-sGDH) and mediators were evaluated based on a theory of bioelectrocatalysis. Quinones showed bi-molecular reaction constants in the order of 1010 M−1 s−1 as the limiting values, while the values of Os-complexes were two or three orders smaller. The magnitude of the limiting values was interpreted in terms of the long-range electron transfer in the active center as well as the diffusion-controlled reaction model.
ISSN:1344-3542
2186-2451
DOI:10.5796/electrochemistry.74.639