Protein
Putative niacin/nicotinamide transporter NaiP
Organism
Bacillus subtilis (strain 168)
Function
Probably involved in the uptake of amidated and deamidated forms of niacin. Increases the growth rate of E.coli that is unable to make niacin de novo; confers increased sensitivity to the toxic niacin analog 6-amino-nicotinamide to wild-type E.coli. There is probably another mechanism for niacin uptake.
Similarity
Belongs to the major facilitator superfamily. Sugar transporter (TC 2.A.1.1) family.
Sequence
MGKQQPISQRKLLGVAGLGWLFDAMDVGILSFIIAALHVEWNLSPEEMKWIGSVNSIGMAAGAFLFGLLADRIGRKKVFIITLLCFSIGSGISAFVTSLSAFLILRFVIGMGLGGELPVASTLVSEAVVPEKRGRVIVLLESFWAVGWLAAALISYFVIPSFGWQAALLLTALTAFYALYLRTSLPDSPKYESLSAKKRSMWENVKSVWARQYIRPTVMLSIVWFCVVFSYYGMFLWLPSVMLLKGFSMIQSFEYVLLMTLAQLPGYFSAAWLIEKAGRKWILVVYLIGTAGSAYFFGTADSLSLLLTAGVLLSFFNLGAWGVLYAYTPEQYPTAIRATGSGTTAAFGRIGGIFGPLLVGTLAARHISFSVIFSIFCIAILLAVACILIMGKETKQTELE