dorsal/arxiv
View SchemaFluctuations of Complex Networks: Electrical Properties of Single Protein Nanodevices
| Authors | C. Pennetta, V. Akimov, E. Alfinito, L. Reggiani, G. Gomila |
|---|---|
| Categories | |
| ArXiv ID | q-bio/0406018 |
| URL | https://arxiv.org/abs/q-bio/0406018 |
| DOI | 10.1117/12.547636 |
Abstract
We present for the first time a complex network approach to the study of the electrical properties of single protein devices. In particular, we consider an electronic nanobiosensor based on a G-protein coupled receptor. By adopting a coarse grain description, the protein is modeled as a complex network of elementary impedances. The positions of the alpha-carbon atoms of each amino acid are taken as the nodes of the network. The amino acids are assumed to interact electrically among them. Consequently, a link is drawn between any pair of nodes neighboring in space within a given distance and an elementary impedance is associated with each link. The value of this impedance can be related to the physical and chemical properties of the amino acid pair and to their relative distance. Accordingly, the conformational changes of the receptor induced by the capture of the ligand, are translated into a variation of its electrical properties. Stochastic fluctuations in the value of the elementary impedances of the network, which mimic different physical effects, have also been considered. Preliminary results concerning the impedance spectrum of the network and its fluctuations are presented and discussed for different values of the model parameters.
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"abstract": "We present for the first time a complex network approach to the study of the\nelectrical properties of single protein devices. In particular, we consider an\nelectronic nanobiosensor based on a G-protein coupled receptor. By adopting a\ncoarse grain description, the protein is modeled as a complex network of\nelementary impedances. The positions of the alpha-carbon atoms of each amino\nacid are taken as the nodes of the network. The amino acids are assumed to\ninteract electrically among them. Consequently, a link is drawn between any\npair of nodes neighboring in space within a given distance and an elementary\nimpedance is associated with each link. The value of this impedance can be\nrelated to the physical and chemical properties of the amino acid pair and to\ntheir relative distance. Accordingly, the conformational changes of the\nreceptor induced by the capture of the ligand, are translated into a variation\nof its electrical properties. Stochastic fluctuations in the value of the\nelementary impedances of the network, which mimic different physical effects,\nhave also been considered. Preliminary results concerning the impedance\nspectrum of the network and its fluctuations are presented and discussed for\ndifferent values of the model parameters.",
"arxiv_id": "q-bio/0406018",
"authors": [
"C. Pennetta",
"V. Akimov",
"E. Alfinito",
"L. Reggiani",
"G. Gomila"
],
"categories": [
"q-bio.MN",
"cond-mat.other",
"physics.bio-ph",
"q-bio.OT"
],
"doi": "10.1117/12.547636",
"title": "Fluctuations of Complex Networks: Electrical Properties of Single Protein Nanodevices",
"url": "https://arxiv.org/abs/q-bio/0406018"
},
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