Observation of dielectric universalities in albumin, cytochrome C and Shewanella oneidensis MR–1 extracellular matrix

0485283 - FZÚ 2018 RIV GB eng J - Článek v odborném periodiku
Motovilov, K.A. - Savinov, Maxim - Zhukova, E.S. - Pronin, A.A. - Gagkaeva, Z.V. - Grinenko, V. - Sidoruk, K.V. - Voeikova, T.A. - Barzilovich, P.Y. - Grebenko, A.K. - Lisovskii, S.V. - Torgashev, V. I. - Bednyakov, Petr - Pokorný, Jan - Dressel, M. - Gorshunov, B. P.
Observation of dielectric universalities in albumin, cytochrome C and Shewanella oneidensis MR–1 extracellular matrix.
Scientific Reports. Roč. 7, č. 1 (2017), s. 1-11, č. článku 15731. ISSN 2045-2322. E-ISSN 2045-2322
Grant CEP: GA ČR GA16-12757S
Institucionální podpora: RVO:68378271
Klíčová slova: bovine serum-albumin * microbial fuel-cells * acterial nanowires * electron-transport * secondary structure * disordered solids * outer-membrane * ac conduction * boson peak * protein
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 4.122, rok: 2017

The electrodynamics of metals is well understood within the Drude conductivity model, properties of insulators and semiconductors are governed by a gap in the electronic states. But there is a great variety of disordered materials that do not fall in these categories and still respond to external field in an amazingly uniform manner. At radiofrequencies delocalized charges yield a frequency-independent conductivity whose magnitude exponentially decreases on cooling. With increasing frequency, dispersionless conductivity starts to reveal a power-law dependence caused by hopping charge carriers. At low temperatures, such Universal Dielectric Response can cross over to another universal regime with nearly constant loss. Here we study a broad-band dielectric response of Shewanella oneidensis MR-1 extracellular matrix, cytochrome C and serum albumin. Applying concepts of condensed matter physics, we identify transport mechanisms to provide a deeper insight into the protein dynamics.
Trvalý link: http://hdl.handle.net/11104/0280353