Function
Transports CMP-sialic acid from the cytosol into Golgi vesicles where glycosyltransferases function (PubMed:8755516, PubMed:10085119, PubMed:30985278). Efficient CMP-sialic acid uptake depends on the presence of free CMP inside the vesicles, suggesting the proteins functions as an antiporter (PubMed:30985278). Binds both CMP-sialic acid and free CMP, but has higher affinity for free CMP (PubMed:30985278).
Sequence
MAPARENVSLFFKLYCLTVMTLVAAAYTVALRYTRTTAEELYFSTTAVCITEVIKLLISVGLLAKETGSLGRFKASLSENVLGSPKELAKLSVPSLVYAVQNNMAFLALSNLDAAVYQVTYQLKIPCTALCTVLMLNRTLSKLQWISVFMLCGGVTLVQWKPAQATKVVVAQNPLLGFGAIAIAVLCSGFAGVYFEKVLKSSDTSLWVRNIQMYLSGIVVTLAGTYLSDGAEIQEKGFFYGYTYYVWFVIFLASVGGLYTSVVVKYTDNIMKGFSAAAAIVLSTIASVLLFGLQITLSFALGALLVCVSIYLYGLPRQDTTSIQQEATSKERIIGV