NCBI Accession #
NP_180131.3
NCBI GenBank Nucleotide #
NM_128118.5
NCBI Official Full Name
Shaker pollen inward K+ channel
NCBI Official Symbol
SPIK
NCBI Official Synonym Symbols
AKT6; F3N11.5; F3N11_5; Shaker pollen inward K+ channel
NCBI Protein Information
Shaker pollen inward K+ channel
NCBI Summary
Encodes SPIK, a member of the Shaker family potassium ion (K+) channel. This family includes five groups based on phylogenetic analysis (FEBS Letters (2007) 581: 2357): I (inward rectifying channel): AKT1 (AT2G26650), AKT5 (AT4G32500) and SPIK (also known as AKT6, AT2G25600); II (inward rectifying channel): KAT1 (AT5G46240) and KAT2 (AT4G18290); III (weakly inward rectifying channel): AKT2 (AT4G22200); IV (regulatory subunit involved in inwardly rectifying conductance formation): KAT3 (also known as AtKC1, AT4G32650); V (outward rectifying channel): SKOR (AT3G02850) and GORK (AT5G37500). Mutant plants have impaired pollen-tube growth.
UniProt Synonym Gene Names
SPIK
UniProt Protein Name
Potassium channel AKT6
UniProt Synonym Protein Names
Potassium channel SPIK; Shaker pollen inward rectifier K(+) channel
UniProt Primary Accession #
Q8GXE6
UniProt Secondary Accession #
Q9SLA3
UniProt Related Accession #
Q8GXE6
UniProt Comments
Highly selective inward-rectifying potassium channel that could mediate potassium uptake in the pollen membrane. Plays an important role in pollen tube development. Assuming opened or closed conformations in response to the voltage difference across the membrane, the channel is activated by hyperpolarization. May interact with the cytoskeleton or with regulatory proteins.