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GORK, a delayed outward rectifier expressed in guard cells of Arabidopsis thaliana, is a K+‐selective, K+‐sensing ion channel
Open accessAbstract
Here we report on the molecular identification, guard cell expression and functional characterization of At GORK, an Arabidopsis thaliana goutward rectifying K+ channel. GORK represents a new member of the plant Shaker K+ channel superfamily. When heterologously expressed in Xenopus oocytes the gene product of GORK mediated depolarization‐activated K+ currents. In agreement with the delayed outward rectifier in intact guard cells and protoplasts thereof, GORK is activated in a voltage‐ and potassium‐dependent manner. Furthermore, the single channel conductance and regulation of GORK in response to pH changes resembles the biophysical properties of the guard cell delayed outward rectifier. Thus GORK very likely represents the molecular entity for depolarization‐induced potassium release from guard cells.
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Citations
Cited by
WHITE, P. J. (2003) · Annals of Botany · doi:10.1093/aob/mcg164 · Cited by 2,381
Phylogenetic Relationships within Cation Transporter Families of Arabidopsis
Mäser, P., Thomine, S., Schroeder, J. I., Ward, J. M., Hirschi, K., Sze, H., Talke, I. N., Amtmann, A., Maathuis, F. J. M., Sanders, D., et al. (2001) · Plant Physiology · doi:10.1104/pp.126.4.1646 · Cited by 1,257
Abscisic Acid Synthesis and Response
Finkelstein, R. (2013) · The Arabidopsis Book · doi:10.1199/tab.0166 · Cited by 1,154
G UARD C ELL S IGNAL T RANSDUCTION
Schroeder, J. I., Allen, G. J., Hugouvieux, V., Kwak, J. M., & Waner, D. (2001) · Annual Review of Plant Physiology and Plant Molecular Biology · doi:10.1146/annurev.arplant.52.1.627 · Cited by 1,153
Barragán, V., Leidi, E. O., Andrés, Z., Rubio, L., De Luca, A., Fernández, J. A., Cubero, B., & Pardo, J. M. (2012) · The Plant Cell · doi:10.1105/tpc.111.095273 · Cited by 630
Metadata
- Authors
- Ache, P., Becker, D., Ivashikina, N., Dietrich, P., Roelfsema, M. R. G., & Hedrich, R.
- Venue
- FEBS Letters
- Publisher
- Wiley
- Published
- 2000-12-07
- Volume
- 486
- Issue
- 2
- Pages
- 93-98
- ISSN
- 0014-5793 (ISSN-L)
- 1873-3468
- OpenAlex
- W2048117041
- Cited by
- 338
- References
- 0
- FWCI
- 4.73
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Ache, P., Becker, D., Ivashikina, N., Dietrich, P., Roelfsema, M. R. G., & Hedrich, R. (2000). GORK, a delayed outward rectifier expressed in guard cells of Arabidopsis thaliana, is a K+‐selective, K+‐sensing ion channel. FEBS Letters. https://doi.org/10.1016/s0014-5793(00)02248-1
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