Abstract
Ion channels have generally been found to have two predominant conductance levels thought to be associated with ‘open’ and ‘closed’ states, but intermediate (subconductance) states have also been reported1–3. We have now found that a large conductance, anion-selective channel in pulmonary alveolar epithelial cells4 can adopt any of six open levels of conductance that are integer multiples of 60–70 pS. The channel is usually either fully open or fully closed. The frequencies of the different conductance levels are inconsistent with the notion that there are six independent channels. We suggest that the channel consists of six conducting pathways in parallel, ‘co-channels’, with a shared gating mechanism that can synchronously render all of them non-conducting. Other channels with lower maximum conductance may operate in a similar way but multiple conductance levels would not easily be detected because of a less favourable signal-to-noise ratio.
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References
Hamill, O. P. & Sakmann, B. Nature 294, 462–464 (1981).
Labarca, P. & Miller, C. J. Membrane Biol. 61, 31–38 (1981).
Pallotta, B., Magleby, K. & Barret, J. Nature 298, 576–578 (1981).
Schneider, G. T., Cook, D. I., Gage, P. W. & Young, J. A. Pflügers Arch. ges. Physiol. 404, 354–357 (1985).
Blatz, A. L. & Magleby, K. L. Biophys. J. 43, 237–241 (1983).
Nelson, D. J., Tang, J. M. & Palmer, L. G. J. Membrane Biol. 80, 81–89 (1984).
Gray, P. T. A., Bevan, S. & Ritchie, J. M. Proc. R. Soc. B221, 395–409 (1984).
Miller, C. Phil. Trans. R. Soc. B299, 401–411 (1982).
Latorre, R. & Miller, C. J. Membrane Biol. 71, 11–30 (1983).
Yellen, G. J. gen. Physiol., 157–186 (1984).
Rae, J. & Levis, R. Molec. Physiol. 6, 115–162 (1984).
Kolb, H. A., Brown, C. D. A. & Murer, H. Pflügers Arch. ges Physiol. 403, 262–265 (1985).
Gibb, A. J. Proc. Aust. physiol pharmac. Soc. 16 (1985).
Kazachenko, V. N. & Geletyuk, V. I. Biochim. biophys. Acta 773, 132–142 (1984).
Geletyuk, V. I. & Kazachenko, V. N. J. Membrane Biol. 86, 9–15 (1985).
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Krouse, M., Schneider, G. & Gage, P. A large anion-selective channel has seven conductance levels. Nature 319, 58–60 (1986). https://doi.org/10.1038/319058a0
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DOI: https://doi.org/10.1038/319058a0
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