Probable outward-rectifying potassium channel. 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 (By similarity). Belongs to the potassium channel family. Plant (TC 1.A.1.4) subfamily.