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Multi-ion conduction bands in a simple model of calcium ion channels

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Multi-ion conduction bands in a simple model of calcium ion channels. / Kaufman, I.; Luchinsky, D. G.; Tindjong, R. et al.
In: Physical Biology, Vol. 10, No. 2, 026007, 04.2013.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Kaufman, I, Luchinsky, DG, Tindjong, R, McClintock, PVE & Eisenberg, RS 2013, 'Multi-ion conduction bands in a simple model of calcium ion channels', Physical Biology, vol. 10, no. 2, 026007. https://doi.org/10.1088/1478-3975/10/2/026007

APA

Kaufman, I., Luchinsky, D. G., Tindjong, R., McClintock, P. V. E., & Eisenberg, R. S. (2013). Multi-ion conduction bands in a simple model of calcium ion channels. Physical Biology, 10(2), Article 026007. https://doi.org/10.1088/1478-3975/10/2/026007

Vancouver

Kaufman I, Luchinsky DG, Tindjong R, McClintock PVE, Eisenberg RS. Multi-ion conduction bands in a simple model of calcium ion channels. Physical Biology. 2013 Apr;10(2):026007. doi: 10.1088/1478-3975/10/2/026007

Author

Kaufman, I. ; Luchinsky, D. G. ; Tindjong, R. et al. / Multi-ion conduction bands in a simple model of calcium ion channels. In: Physical Biology. 2013 ; Vol. 10, No. 2.

Bibtex

@article{8df3e9ef613840d19672ab6aae3bfa45,
title = "Multi-ion conduction bands in a simple model of calcium ion channels",
abstract = "We report self-consistent Brownian dynamics simulations of a simple electrostatic model of the selectivity filters (SF) of calcium ion channels. They reveal regular structure in the conductance and selectivity as functions of the fixed negative charge Q(f) at the SF. With increasing Q(f), there are distinct regions of high conductance (conduction bands) M0, M1, M2 separated by regions of almost zero-conductance (stop-bands). Two of these conduction bands, M1 and M2, are related to the saturated calcium occupancies of P = 1 and P = 2, respectively and demonstrate self-sustained conductivity. Despite the model's limitations, its M1 and M2 bands show high calcium selectivity and prominent anomalous mole fraction effects and can be identified with the L-type and RyR calcium channels. The non-selective band M0 can be identified with a non-selective cation channel, or with OmpF porin.",
keywords = "PERMEATION, GATED SODIUM-CHANNEL, MECHANISM, MEMBRANE, SELECTIVITY, SIMULATION, MUTATIONS",
author = "I. Kaufman and Luchinsky, {D. G.} and R. Tindjong and McClintock, {P. V. E.} and Eisenberg, {R. S.}",
year = "2013",
month = apr,
doi = "10.1088/1478-3975/10/2/026007",
language = "English",
volume = "10",
journal = "Physical Biology",
issn = "1478-3967",
publisher = "IOP Publishing Ltd.",
number = "2",

}

RIS

TY - JOUR

T1 - Multi-ion conduction bands in a simple model of calcium ion channels

AU - Kaufman, I.

AU - Luchinsky, D. G.

AU - Tindjong, R.

AU - McClintock, P. V. E.

AU - Eisenberg, R. S.

PY - 2013/4

Y1 - 2013/4

N2 - We report self-consistent Brownian dynamics simulations of a simple electrostatic model of the selectivity filters (SF) of calcium ion channels. They reveal regular structure in the conductance and selectivity as functions of the fixed negative charge Q(f) at the SF. With increasing Q(f), there are distinct regions of high conductance (conduction bands) M0, M1, M2 separated by regions of almost zero-conductance (stop-bands). Two of these conduction bands, M1 and M2, are related to the saturated calcium occupancies of P = 1 and P = 2, respectively and demonstrate self-sustained conductivity. Despite the model's limitations, its M1 and M2 bands show high calcium selectivity and prominent anomalous mole fraction effects and can be identified with the L-type and RyR calcium channels. The non-selective band M0 can be identified with a non-selective cation channel, or with OmpF porin.

AB - We report self-consistent Brownian dynamics simulations of a simple electrostatic model of the selectivity filters (SF) of calcium ion channels. They reveal regular structure in the conductance and selectivity as functions of the fixed negative charge Q(f) at the SF. With increasing Q(f), there are distinct regions of high conductance (conduction bands) M0, M1, M2 separated by regions of almost zero-conductance (stop-bands). Two of these conduction bands, M1 and M2, are related to the saturated calcium occupancies of P = 1 and P = 2, respectively and demonstrate self-sustained conductivity. Despite the model's limitations, its M1 and M2 bands show high calcium selectivity and prominent anomalous mole fraction effects and can be identified with the L-type and RyR calcium channels. The non-selective band M0 can be identified with a non-selective cation channel, or with OmpF porin.

KW - PERMEATION

KW - GATED SODIUM-CHANNEL

KW - MECHANISM

KW - MEMBRANE

KW - SELECTIVITY

KW - SIMULATION

KW - MUTATIONS

U2 - 10.1088/1478-3975/10/2/026007

DO - 10.1088/1478-3975/10/2/026007

M3 - Journal article

VL - 10

JO - Physical Biology

JF - Physical Biology

SN - 1478-3967

IS - 2

M1 - 026007

ER -