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ATKCO1  -  two-pore potassium channel 1

Arabidopsis thaliana

Synonyms: ATTPK1, CA2+ ACTIVATED OUTWARD RECTIFYING K+ CHANNEL 1, KCO1, MDF20.7, MDF20_7, ...
 
 
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High impact information on KCO1

  • KCO1 has four putative transmembrane segments and tandem calcium-binding EF-hand motifs [1].
  • Fluorescence resonance energy transfer assays indicate that protein interaction occurs between identical channel subunits (most efficiently between AtTPK1 or AtKCO3) but not between different channel subunits [2].
  • TPK1 (formerly KCO1) is the founding member of the family of two-pore domain K(+) channels in Arabidopsis (Arabidopsis thaliana), which originally was described following expression in Sf9 insect cells as a Ca(2+)- and voltage-dependent outwardly rectifying plasma membrane K(+) channel [3].
  • In order to obtain further information on the physiological function of AtKCO1, the gene expression pattern and subcellular localization of the protein in plants were investigated [4].

References

  1. New structure and function in plant K+ channels: KCO1, an outward rectifier with a steep Ca2+ dependency. Czempinski, K., Zimmermann, S., Ehrhardt, T., Müller-Röber, B. EMBO J. (1997) [Pubmed]
  2. Members of the Arabidopsis AtTPK/KCO family form homomeric vacuolar channels in planta. Voelker, C., Schmidt, D., Mueller-Roeber, B., Czempinski, K. Plant J. (2006) [Pubmed]
  3. TPK1 is a vacuolar ion channel different from the slow-vacuolar cation channel. Bihler, H., Eing, C., Hebeisen, S., Roller, A., Czempinski, K., Bertl, A. Plant Physiol. (2005) [Pubmed]
  4. Vacuolar membrane localization of the Arabidopsis 'two-pore' K+ channel KCO1. Czempinski, K., Frachisse, J.M., Maurel, C., Barbier-Brygoo, H., Mueller-Roeber, B. Plant J. (2002) [Pubmed]
 
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