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Expression of an inward-rectifying potassium channel by the Arabidopsis KAT1 cDNA
Abstract
Inward-rectifying potassium channels located in the plasma membrane of higher plant and animal cells contribute to cellular homeostasis and excitability. The genes encoding this specific class of K+ channels have not been functionally identified. This report shows that a single messenger RNA transcript from the Arabidopsis thaliana KAT1 complementary DNA confers the functional expression of a hyperpolarization-activated K+ channel in Xenopus oocytes. The channels encoded by KAT1 are highly selective for K+ over other monovalent cations, are blocked by tetraethylammonium and barium, and have a single channel conductance of 28 +/- 7 picosiemens with 118 millimolar K+ in the bathing solution. These functional characteristics, typical of inward-rectifying K+ channels in eukaryotic cells, demonstrate that KAT1 encodes an inward-rectifying K+ channel.
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Hamill, O. P., Marty, A., Neher, E., Sakmann, B., & Sigworth, F. J. (1981) · Pflügers Archiv - European Journal of Physiology · doi:10.1007/bf00656997 · Cited by 18,436
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Metadata
- Authors
- Schachtman, D., Schroeder, J., Lucas, W., Anderson, J., & Gaber, R.
- Venue
- Science
- Published
- 1992-12-04
- Volume
- 258
- Issue
- 5088
- Pages
- 1654-1658
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2012619013
- Cited by
- 456
- References
- 1
- FWCI
- 9.29
- Type
- journal article
- Language
- en
- Open access
- closed
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- Schachtman, D., Schroeder, J., Lucas, W., Anderson, J., & Gaber, R. (1992). Expression of an inward-rectifying potassium channel by the Arabidopsis KAT1 cDNA. Science. https://doi.org/10.1126/science.8966547
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