A thylakoid-located two-pore K+ channel controls photosynthetic light utilization in plants.

@article{Carraretto2013ATT,
  title={A thylakoid-located two-pore K+ channel controls photosynthetic light utilization in plants.},
  author={Luca Carraretto and Elide Formentin and Enrico Teardo and Vanessa Checchetto and Martino Tomizioli and Tomas Morosinotto and Giorgio Mario Giacometti and Giovanni Finazzi and Ildik{\`o} Szab{\`o}},
  journal={Science},
  year={2013},
  volume={342 6154},
  pages={114-8}
}
The size of the light-induced proton motive force (pmf) across the thylakoid membrane of chloroplasts is regulated in response to environmental stimuli. Here, we describe a component of the thylakoid membrane, the two-pore potassium (K(+)) channel TPK3, which modulates the composition of the pmf through ion counterbalancing. Recombinant TPK3 exhibited potassium-selective channel activity sensitive to Ca(2+) and H(+). In Arabidopsis plants, the channel is found in the thylakoid stromal lamellae… CONTINUE READING
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