>TIGR00803 nst UDP-galactose transporter; InterPro: IPR004689 Nucleotide-sugar transporters (NSTs) are found in the Golgi apparatus and the endoplasmic reticulum of eukaryotic cells. Members of the family have been sequenced from yeast, protozoans and animals. Animals such as Caenorhabditis elegans possess many of these transporters. Humans have at least two closely related isoforms of the UDP-galactose:UMP exchange transporter. NSTs generally appear to function by antiport mechanisms, exchanging a nucleotide-sugar for a nucleotide. Thus, CMP-sialic acid is exchanged for CMP; GDP-mannose is preferentially exchanged for GMP, and UDP-galactose and UDP-N-acetylglucosamine are exchanged for UMP (or possibly UDP). Other nucleotide sugars (e.g., GDP-fucose, UDP-xylose, UDP-glucose, UDP-N-acetylgalactosamine, etc.) may also be transported in exchange for various nucleotides, but their transporters have not been molecularly characterised. Each compound appears to be translocated by its own transport protein. Transport allows the compound, synthesized in the cytoplasm, to be exported to the lumen of the Golgi apparatus or the endoplasmic reticulum where it is used for the synthesis of glycoproteins and glycolipids. ; GO: 0005338 nucleotide-sugar transmembrane transporter activity, 0015780 nucleotide-sugar transport, 0016021 integral to membrane.

Probab=90.58 E-value=0.83 Score=21.33 Aligned_cols=168 Identities=15% Similarity=0.032 Sum_probs=94.4 Q ss_pred HHHHHCCCCCCCHHHHHHHHHHHHHHHHHHCCCCCC----------HHHHHH----HHHHHHHHHHHCCCCCCCCCH-HH Q ss_conf 997420235643799999999865655662368852----------057799----999865321000112344422-57 Q gi|254780575|r 133 FLGSVFLKERLNHLQIIAALLIILSLLIMTLHSGIP----------LLSLAI----AVTWSAYCFARKTIPVGSSEG-FF 197 (316) Q Consensus 133 ~~~~~~~~~~~~~~~~~~~~~~~~g~~~~~~~~~~~----------~~~~~~----~~~~~~~~~~~~~~~~~~~~~-~~ 197 (316) T Consensus 41 l~~~~~l~~~lg~~~~~s~~~l~~~~~~V~~~~~~~~~~~~g~~~~~~~~~a~~~a~l~~~~~~~Yf~~~lk~~~~~Pfw 120 (235) T TIGR00803 41 LMTLLSLVRSLGDDQWFSLKLLKLGVAIVQLVQSSAKTLMEGVLNPVVGLSAVLSALLSSGFAGVYFEKILKDKDTSPFW 120 (235) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCHH T ss_conf 99999998633368999999997667752000123344444468999999999999999986310243316777786143 Q ss_pred HHHHHHHHHHHHHH-----HHHHCCCCC---CCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHCCHH---HHHHHHHHH Q ss_conf 88999999877775-----310013456---5678725667886533442115799999998625869---999999999 Q gi|254780575|r 198 IEMCVLAIPALFYV-----VWNGFSGGE---HFFLGNIPDTLFLIGYGLLNSFVFCIFSYGIKRAKLS---TVGIMEYTA 266 (316) Q Consensus 198 ~~~~~~~~~~~~~~-----~~~~~~~~~---~~~~~~~~~~~~l~l~~~~t~i~~~~~~~a~~~~~a~---~~s~~~~l~ 266 (316) T Consensus 121 ~~~l~L~~f~~~~~~L~~E~~~~~~s~~~~~~~~gff~~~~~~~~~v~~l~~~~~~~~~~vv~~~dnt~al~~s~~~als 200 (235) T TIGR00803 121 VRNLQLPLFGLFSTRLIDEFSVLLLSDGSLISNKGFFFGYTTAVWIVILLQVGGGLCVGLVVKYADNTAALTKSFVTALS 200 (235) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHCCCHHHHHHHHHHHHH T ss_conf 57889889999999898988766643102211100456547899999999988899888888651633478899999999 Q ss_pred HHHHHHHH-HHHHCCCCCHHHHHHHHHHHHHHHHH Q ss_conf 99999999-99978889989999999999999999 Q gi|254780575|r 267 PLLMIVSS-VFILKQPIDTVRTIVFGIVVIAMVVY 300 (316) Q Consensus 267 Pv~a~i~~-~~~l~E~~~~~~~iG~~lIi~gv~l~ 300 (316) T Consensus 201 ~~~s~l~S~~~l~d~~~~~~~~lG~~lV~~~~~lY 235 (235) T TIGR00803 201 IILSTLASNVRLFDAKISLTFYLGAILVFLATFLY 235 (235) T ss_pred HHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHCC T ss_conf 99999999999804555378999999999997439

HHsearch alignment for GI: 254780575 and conserved domain: TIGR00803