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Bioelectrocatalysis

Discover the acceleration of electrode reactions by biological catalysts in bioelectrocatalysis. Explore the use of whole cells, enzymes, and biofuel cells in various applications like biosensors and electrosynthesis. Learn about direct bioelectrocatalysis and the involvement of enzymes through mediators. Investigate second-generation biosensors, enzyme bioelectrocatalysis, and the role of promoters for protein electroactivity. Explore iron-sulfur clusters and enzymes for direct bioelectrocatalysis. Uncover the fundamentals behind involving oxidases in bioelectrocatalysis through various techniques.

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Bioelectrocatalysis

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  1. Bioelectrocatalysis Arkady A. Karyakin Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia

  2. Bioelectrocatalysis is an acceleration of electrode reactions by biological catalysts Whole cells Enzymes

  3. Applications of bioelectrocatalysis Fuel electrodes (biofuel cells) Biosensors Electrosysthesis

  4. Enzyme bioelectrocatalysis

  5. BIOELECTROCATALYSIS P2 S2

  6. How to involve enzymes in bioelectrocatalysis? Use of mediators: Direct bioelectrocatalysis:

  7. Direct bioelectrocatalysis if electrochemistry is determined by the catalyzed reaction or/and redox activity of biocatalyst

  8. Oxidase catalysis

  9. Redox activity of oxidases E ≈ -0.064 В (NHE) FAD

  10. Mediated bioelectrocatalysis – II generation biosensors A. E. G. Cass, G. Davis, G. D. Francis, H. A. O. Hill, W. G. Aston, I. J. Higgins, E. V. Plotkin, L. D. L. Scott, and A. P. F. Turner, Analytical Chemistry 56, 667-671 (1984).

  11. Glucose tests

  12. Mediated bioelectrocatalysis – II generation biosensors B.A. Gregg, A. Heller. Anal. Chem. 62 (1990) 258

  13. Wiring of glucose oxidase E = -0.195 mV (Ag|AgCl) Heller, A. Physical Chemistry Chemical Physics2004, 6, 209-216.

  14. Glucose test • Therasense: • 0.3 µL of blood

  15. Direct enzyme bioelectrocatalysis

  16. Protein electroactivity Cytochrome C S.R. Betso, M.H. Klapper, L.B. Anderson. J. Am. Chem. Soc. 94 (1972) 8197-204. M.R. Tarasevich, V.A. Bogdanovskaya. Bioelectrochem. Bioenerg. 3 (1976) 589-95. M.J. Eddowes, H.A.O. Hill. J. Chem. Soc. , Chem. Commun. (1977) 71 P. Yeh, T. Kuwana. Chem. Lett. (1977) 1145-8 Niki K, Yagi T, Inokuchi H, Kimura K. JACS101 (1979) 3335-40.

  17. ē ē Promoters for protein electroactivity gold M.J. Eddowes, H.A.O. Hill. J. Chem. Soc. , Chem. Commun. (1977) 71 P. Yeh, T. Kuwana. Chem. Lett. (1977) 1145-8

  18. Direct bioelectrocatalysis Est = 1.2 V Berezin I. V., Bogdanovskaya V. A., Varfolomeev S.D., M.R. Tarasevich, A.I Yaropolov. Dokl.Akad.Nauk SSSR(Proc. Acad. Sci.) 240 (1978) 615-618

  19. Iron-sulfur clusters HEM PQQ Enzymes for direct bioelectrocatalysis Others

  20. Direct bioelectrocatalysis A.I Yaropolov, V. Malovik, Varfolomeev S.D., Berezin I. V. Dokl.Akad.Nauk SSSR(Proc. Acad. Sci.) 249 (1979) 1399-401

  21. Direct bioelectrocatalysis A.I. Yaropolov, A.A. Karyakin, S.D. Varfolomeyev, I.V. Berezin. Bioelectrochem. Bioenerg. 12 (1984) 267-77

  22. (Yaropolov A.I., Karyakin A.A., Varfolomeyev S.D., Berezin I.V. Bioelectrochem. & Bioenergetics 12 (1984) 267-277) BIOELECTROCATALYSIS by Th. roseopersicina hydrogenase (1), (3) - H2 ; (2) - Ar (3) - without active enzyme

  23. Nernst’ equation for Equilibrium hydrogen potential (100% energy conversion)

  24. How to involve oxidases in bioelectrocatalysis? • surface pre-treatment; • usingof promoters; • surface design by conducting polymers.

  25. Fundamentals of direct bioelectrocatalysis Investigations of enzyme redox centers Redox switching of enzyme activity

  26. Direct bioelectrocatalysis by intact cells

  27. Cell membrane

  28. Respiratory in mitochondrion

  29. Bacterial cell membranes

  30. Inorganic ion reducing bacteria Shewanellaputrefaciens Lactateas electron donor Insoluble Fe3+as electron acceptor

  31. Electroactivity of Shewanellaputrefaciens A – air exposed cells B – air exposed with lactate C – no air, but at + 200 mV D – at +200 mV with lactate Kim, B. H.; Ikeda, T.; Park, H. S.; Kim, H. J.; Hyun, M. S.; Kano, K.; Takagi, K.; Tatsumi, H. Biotechnology Techniques1999, 13, 475-478.

  32. Current response of Desulfobulbuspropionicus Holmes, D. E.; Bond, D. R.; Lovley, D. R. Applied And Environmental Microbiology2004, 70, 1234-1237.

  33. Geobactersulfurreducens on graphite electrode Bond, D. R.; Lovley, D. R. Applied And Environmental Microbiology2003, 69, 1548.

  34. Advantagesof bioelectrocatalysis: • a possibility for electrochemistry of complex organic reactions; • high efficiency at room temperature and moderate overvoltages; • achieve high specificity. Disadvantages: • inherent instability, • large dimensions • of biological catalysts.

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