Protein
Potassium channel KAT2
Organism
Arabidopsis thaliana
Function
Highly selective inward-rectifying potassium channel. This voltage-dependent channel could mediate long-term potassium influx into guard cells leading to stomatal opening. Assuming opened or closed conformations in response to the voltage difference across the membrane, the channel is activated by hyperpolarization. The channel activity is enhanced upon external acidification.
Similarity
Belongs to the potassium channel family. Plant (TC 1.A.1.4) subfamily.
Sequence
MSISCTRNFFKRFCVEEYNMDTFKHSSFLSADLLPSLGARINQSTKLRKHIISPFDPRFRGWEMWLVILVIYSAWICPFEFAFITYKKDALFIIDNIVNGFFAIDIILTFFVAYLDSHSYLLVDKPKKIAIRYLSTWFAFDVCSTAPFQSLSLLFKYNGSEIGFRVLSMLRLWRLRRVSSLFARLEKDIRFNYFWTRCTKLISVTLFAVHCAGCFAYLIADQYHDPTKTWIGAVYPNFKETSVWSRYVTALYWSITTLTTTGYGDLHAENPREMLFFVFFMLFNLGFTSYLIGNMTNLVVHWTSRTRNFRDTVRAASEFASRNQLPPNIQDQMLSHICLKFKTEGLKQQEALNGLPKAIRSSIANYLFFPIVQNVYLFHGVSRNFLFQLVSDIDAEYFPPREDVILQNEAPTDLYILVSGAVDFTVYVGEEDQVQGKAVVGDAFGEIGVLCYTPQPFTVRTTELSQILRISKKSLMSAMRAHVEDGRVIMNNLFMKLRGQQSIAIDDPNSEPESLLKEWLVGGSKTGEGNASDQGHGHKYLQLHDSENIDMGSTEWRDSRRSGYGETKRVREHTIEIEEGEKPNKEFDGKGCSDADLTSFEFHSQEAYPYCRSNIQIKQHEAAKPKDKRVTIHLKSRDKDLSKLIILPASIEELLRLAGEKFGYSFTKVTNAENAEIDDEDVIRDGDHLYILINENS