Horváth, Ferenc: Inactivation of KAT1 channel of guard cells at submillimolar concentrations of external potassium. In: Acta biologica Szegediensis, (49) 1-2. pp. 3-5. (2005)
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Abstract
In the present study we investigated the effect of depleting K+o on the activity of a plant K+ channel, the inward rectifier KAT1 from Arabidopsis thaliana. Most voltage sensitive K+ channels are able to sense the concentration of extracellular K+ (K+o) and inactivate if K+o decreases to sublillimolar values. The channel was expressed in mammalian HEK293 cells and measured with patch clamp in the whole cell configuration. The effect of K+o depletion on channel activity was monitored from the tail currents before during and after washing K+o from the medium. The data show that a depletion of K+o results in a decrease in channel conductance. This high sensitivity of the channel to K+o could serve as a safety mechanism, which inactivates the channel at low K+o and prevents in this way leakage of K+ from the cells via this type of channel.
| Item Type: | Article |
|---|---|
| Heading title: | Cell biology; Proceedings |
| Journal or Publication Title: | Acta biologica Szegediensis |
| Date: | 2005 |
| Volume: | 49 |
| Number: | 1-2 |
| ISSN: | 1588-385X |
| Page Range: | pp. 3-5 |
| Language: | angol |
| Event Title: | Hungarian Congress on Plant Physiology, 8., 2005, Szeged, Hungarian Conference on Photosynthesis, 6., 2005, Szeged |
| Uncontrolled Keywords: | Természettudomány, Biológia |
| Additional Information: | Bibliogr.: 5. p.; Abstract |
| Date Deposited: | 2016. Oct. 17. 09:24 |
| Last Modified: | 2018. May. 28. 10:47 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/22658 |
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