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Lozano H, Fabregas R, Blanco-Cabra N, et al. Dielectric constant of flagellin proteins measured by scanning dielectric microscopy. Nanoscale. 2018;10(40):19188-19194doi: 10.1039/c8nr06190d.
Lozano, H., Fabregas, R., Blanco-Cabra, N., Millán-Solsona, R., Torrents, E., Fumagalli, L., & Gomila, G. (2018). Dielectric constant of flagellin proteins measured by scanning dielectric microscopy. Nanoscale, 10(40), 19188-19194. https://doi.org/10.1039/c8nr06190d
Lozano, Helena, et al. "Dielectric constant of flagellin proteins measured by scanning dielectric microscopy." Nanoscale vol. 10,40 (2018): 19188-19194. doi: https://doi.org/10.1039/c8nr06190d
Lozano H, Fabregas R, Blanco-Cabra N, Millán-Solsona R, Torrents E, Fumagalli L, Gomila G. Dielectric constant of flagellin proteins measured by scanning dielectric microscopy. Nanoscale. 2018 Oct 18;10(40):19188-19194. doi: 10.1039/c8nr06190d. PMID: 30302472.
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Nanoscale. 2018 Oct 18;10(40):19188-19194. doi: 10.1039/c8nr06190d.

Dielectric constant of flagellin proteins measured by scanning dielectric microscopy.

Nanoscale

Helena Lozano, Rene Fabregas, Núria Blanco-Cabra, Rubén Millán-Solsona, Eduard Torrents, Laura Fumagalli, Gabriel Gomila

Affiliations

  1. Nanoscale Bioelectrical Characterization, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), c/ Baldiri i Reixac 11-15, 08028, Barcelona, Spain. [email protected].

PMID: 30302472 DOI: 10.1039/c8nr06190d

Abstract

The dielectric constant of flagellin proteins in flagellar bacterial filaments ∼10-20 nm in diameter is measured using scanning dielectric microscopy. We obtained for two different bacterial species (Shewanella oneidensis MR-1 and Pseudomonas aeruginosa PAO1) similar relative dielectric constant values εSo = 4.3 ± 0.6 and εPa = 4.5 ± 0.7, respectively, despite their different structure and amino acid sequence. The present results show the applicability of scanning dielectric microscopy to nanoscale filamentous protein complexes and to general 3D macromolecular protein geometries, thus opening new avenues to study the relationship between the dielectric response and protein structure and function.

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