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ADP Ribosylation Factor 6 (Arf6) Modulates the Cell Surface Expression of the Cardiac Acetylcholine‐Activated Inward Rectifier Potassium Current (IKACh) Proteins

It has been suggested that the ADP ribosylation factor 6 (Arf6) plays a role in the trafficking of Kir3.1 and Kir3.4 proteins ‐ the molecular correlates of the cardiac acetylcholine‐activated inward rectifier potassium current (IKACh). However, further details need to be elucidated. Therefore, we investigated the effects of Arf6 activity on the localization of Kir3.1 and Kir3.4 proteins using flow cytometry, Arf6 activation pull‐down assay, and live confocal microscopy. We tested the hypothesis that Arf6 cycling between the GDP‐ and GTP‐bound forms modulates the cell surface expression of IKACh proteins.