Probable potassium channel. May interact with the cytoskeleton or with regulatory proteins (By similarity). The potassium channel is probably composed of a homo- or heterotetrameric complex of pore-forming subunits. Predominantly expressed in flowers. The segment S4 is probably the voltage-sensor and is characterized by a series of positively charged amino acids. The pore-forming region H5 is enclosed by the transmembrane segments S5 and S6 in the Shaker-type (1P/6TM) and contains the GYGD signature motif which seems to be involved in potassium selectivity. The KHA domain (rich in hydrophobic and acidic residues) present in the C-terminal part is likely to be important for tetramerization. Belongs to the potassium channel family. Plant (TC 1.A.1.4) subfamily. Was originally erroneously termed AKT6.