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Electrochemical redox transformations of T1 and T2 copper sites in native Trametes hirsuta laccase at gold electrode
Open accessAbstract
Mediatorless, electrochemically driven, redox transformations of T1 (type 1) and T2 copper sites in Trametes hirsuta laccase were studied by cyclic voltammetry and spectroelectrochemical redox titrations using bare gold electrode. DET (direct electron transfer) between the electrode and the enzyme was observed under anaerobic conditions. From analysis of experimental data it is concluded that the T2 copper site is in DET contact with gold. It was found that electron transfer between the gold surface and the T1 copper site progresses through the T2 copper site. From EPR measurements and electrochemical data it is proposed that the redox potential of the T2 site for high-potential ‘blue’ laccase is equal to about 400 mV versus NHE (normal hydrogen electrode) at pH 6.5. The hypothesis that the redox potentials of the T2 copper sites in low- and high-potential laccases/oxidases from totally different sources might be very similar, i.e. approx. 400 mV, is discussed.
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Citations
Cites
Multicopper oxidases and oxygenases
Solomon, E. I., Sundaram, U. M., & Machonkin, T. E. (1996) · Chemical Reviews · doi:10.1021/cr950046o · Cited by 3,664
Piontek, K., Antorini, M., & Choinowski, T. (2002) · Journal of Biological Chemistry · doi:10.1074/jbc.m204571200 · Cited by 909
Cited by
Morozova, O. V., Shumakovich, G. P., Gorbacheva, M. A., Shleev, S. V., & Yaropolov, A. I. (2007) · Biochemistry (Moscow) · doi:10.1134/s0006297907100112 · Cited by 415
Self-citationEffective mutations in a high redox potential laccase from Pleurotus ostreatus
Macellaro, G., Baratto, M. C., Piscitelli, A., Pezzella, C., Fabrizi de Biani, F., Palmese, A., Piumi, F., Record, E., Basosi, R., & Sannia, G. (2014) · Applied Microbiology and Biotechnology · doi:10.1007/s00253-013-5491-8 · Cited by 40
Zhao, Z.-T., Ding, J., Pang, J.-W., Bao, M.-Y., Luo, G., Wang, B.-Y., Liu, B.-F., Zhang, L.-Y., Ren, N.-Q., & Yang, S.-S. (2025) · Critical Reviews in Environmental Science and Technology · doi:10.1080/10643389.2025.2484892 · Cited by 20
Metadata
- Authors
- SHLEEV, S., CHRISTENSON, A., SEREZHENKOV, V., BURBAEV, D., YAROPOLOV, A., GORTON, L., & RUZGAS, T.
- Venue
- Biochemical Journal
- Publisher
- Portland Press Ltd.
- Published
- 2005-01-24
- Volume
- 385
- Issue
- 3
- Pages
- 745-754
- ISSN
- 0264-6021 (ISSN-L)
- 1470-8728
- OpenAlex
- W2124127046
- Cited by
- 173
- References
- 2
- FWCI
- 15.30
- Type
- journal article
- Language
- en
- Open access
- bronze
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- SHLEEV, S., CHRISTENSON, A., SEREZHENKOV, V., BURBAEV, D., YAROPOLOV, A., GORTON, L., & RUZGAS, T. (2005). Electrochemical redox transformations of T1 and T2 copper sites in native Trametes hirsuta laccase at gold electrode. Biochemical Journal. https://doi.org/10.1042/bj20041015
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