Clustering of the K⁺ channel GORK of Arabidopsis parallels its gating by extracellular K

• Published in: The Plant journal : for cell and molecular biology Vol. 78; no. 2; pp. 203 - 214
• Main Authors: Eisenach, Cornelia, Papanatsiou, Maria, Hillert, Ellin‐Kristina, Blatt, Michael R
• Format: Journal Article
• Language: English
• Published: England Blackwell Science 01.04.2014; Blackwell Publishing Ltd; BlackWell Publishing Ltd
• Subjects: abscisic acid; Arabidopsis; Arabidopsis - metabolism; Arabidopsis Proteins - genetics; Arabidopsis Proteins - metabolism; Arabidopsis Proteins - physiology; barium; Biochemical analysis; Biochemistry; Biological Transport; Botany; Cellular biology; channel gating – K+‐dependent; confocal microscopy; dissociation; Epidermis; GORK K+ channel – outward‐rectifying; guard cells; K+ concentration – extracellular; membrane vesicle traffic; Original; plasma membrane; Potassium; Potassium - metabolism; potassium channels; Potassium Channels - genetics; Potassium Channels - metabolism; Potassium Channels - physiology; Potassium Channels, Inwardly Rectifying - metabolism; Potassium Channels, Inwardly Rectifying - physiology; Potassium Chloride - metabolism; Proteins; stomatal movement; Arabidopsis; GORK K+ channel - outward-rectifying; confocal microscopy; plasma membrane; K+ concentration - extracellular; channel gating - K+-dependent; membrane vesicle traffic

GORK is the only outward‐rectifying Kv‐like K⁺ channel expressed in guard cells. Its activity is tightly regulated to facilitate K⁺ efflux for stomatal closure and is elevated in ABA in parallel with suppression of the activity of the inward‐rectifying K⁺ channel KAT1. Whereas the population of KAT1...