Protein
High-affinity choline transporter 1
Organism
Drosophila melanogaster
Function
Imports choline from the extracellular space to the neuron with high affinity. Rate-limiting step in acetylcholine synthesis. Sodium ion and chloride ion dependent (By similarity).
Similarity
Belongs to the sodium:solute symporter (SSF) (TC 2.A.21) family.
Sequence
MINIAGVVSIVLFYLLILVVGIWAGRKKQSGNDSEEEVMLAGRSIGLFVGIFTMTATWVGGGYINGTAEAIYTSGLVWCQAPFGYALSLVFGGIFFANPMRKQGYITMLDPLQDSFGERMGGLLFLPALCGEVFWAAGILAALGATLSVIIDMDHRTSVILSSCIAIFYTLFGGLYSVAYTDVIQLFCIFIGLWMCIPFAWSNEHVGSLSDLEVDWIGHVEPKKHWLYIDYGLLLVFGGIPWQVYFQRVLSSKTAGRAQLLSYVAAAGCILMAIPPVLIGAIAKATPWNETDYKGPYPLTVDETSMILPMVLQYLTPDFVSFFGLGAVSAAVMSSADSSVLSAASMFARNVYKLIFRQKASEMEIIWVMRVAIIVVGILATIMALTIPSIYGLWSMCSDLVYVILFPQLLMVVHFKKHCNTYGSLSAYIVALAIRLSGGEAILGLAPLIKYPGYDEETKEQMFPFRTMAMLLSLVTLISVSWWTKMMFESGKLPPSYDYFRCVVNIPEDVQRVGDPSESGEQLSVMAGPLARSYGAATMAGKDERNGRINPALESDDDLPVAEARRINQETAQAQVKKMLDNATGVKPSGGGGGHLQSQSGMAMPTAEQDNTAF