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lacY

Gene
lacY
Protein
Lactose permease
Organism
Lactobacillus delbrueckii subsp. bulgaricus (strain ATCC 11842 / DSM 20081 / JCM 1002 / NBRC 13953 / NCIMB 11778)
Length
627 amino acids
Function
Responsible for transport of beta-galactosides into the cell, with the concomitant uptake of protons (symport system), and also for transport of homologous and heterologous exchange of beta-galactosides.
Similarity
In the N-terminal section; belongs to the sodium:galactoside symporter (TC 2.A.2) family.
Mass
68.289 kDa
Sequence
MKKKLVSRLSYAAGAFGNDVFYATLSTYFIVFVTTHLFNAGDHKMIFIITNLITAIRIGEVLLDPLIGNAIDRTESRWGKFKPWVVGGGIISSLALLALFTDFGGINQSKPVVYLVIFGIVYLIMDIFYSFKDTGFWAMIPALSLDSREREKTSTFARVGSTIGANLVGVVITPIILFFSASKANPNGDKQGWFFFALIVAIVGILTSITVGLGTHEVKSALRESNEKTTLKQVFKVLGQNDQLLWLAFAYWFYGLGINTLNALQLYYFSYILGDARGYSLLYTINTFVGLISASFFPSLAKKFNRNRLFYACIAVMLLGIGVFSVASGSLALSLVGAEFFFIPQPLAFLVVLMIISDAVEYGQLKTGHRDEALTLSVRPLVDKLGGALSNWFVSLIALTAGMTTGATASTITAHGQMVFKLAMFALPAVMLLIAVSIFAKKVFLTEEKHAEIVDQLETQFGQSHAQKPAQAESFTLASPVSGQLMNLDMVDDPVFADKKLGDGFALVPADGKVYAPFAGTVRQLAKTRHSIVLENEHGVLVLIHLGLGTAKLNGTGFVSYVEEGSQVEAGQQILEFWDPAIKQAKLDDTVIVTVINSETFANSQMLLPIGHSVQALDDVFKLEGKN

Gene
lacY
Protein
Lactose permease
Organism
Escherichia coli (strain K12)
Length
417 amino acids
Function
Responsible for transport of beta-galactosides into the cell, with the concomitant import of a proton (symport system). Can transport lactose, melibiose, lactulose or the analog methyl-1-thio-beta,D-galactopyranoside (TMG), but not sucrose or fructose (PubMed:1848449, PubMed:18177889, PubMed:22106930). The substrate specificity is directed toward the galactopyranosyl moiety of the substrate (PubMed:22106930).
Similarity
Belongs to the major facilitator superfamily. Oligosaccharide:H(+) symporter (OHS) (TC 2.A.1.5) family.
Mass
46.503 kDa
Sequence
MYYLKNTNFWMFGLFFFFYFFIMGAYFPFFPIWLHDINHISKSDTGIIFAAISLFSLLFQPLFGLLSDKLGLRKYLLWIITGMLVMFAPFFIFIFGPLLQYNILVGSIVGGIYLGFCFNAGAPAVEAFIEKVSRRSNFEFGRARMFGCVGWALCASIVGIMFTINNQFVFWLGSGCALILAVLLFFAKTDAPSSATVANAVGANHSAFSLKLALELFRQPKLWFLSLYVIGVSCTYDVFDQQFANFFTSFFATGEQGTRVFGYVTTMGELLNASIMFFAPLIINRIGGKNALLLAGTIMSVRIIGSSFATSALEVVILKTLHMFEVPFLLVGCFKYITSQFEVRFSATIYLVCFCFFKQLAMIFMSVLAGNMYESIGFQGAYLVLGLVALGFTLISVFTLSGPGPLSLLRRQVNEVA

Gene
lacY
Protein
Lactose permease
Organism
Citrobacter freundii
Length
416 amino acids
Function
Responsible for transport of beta-galactosides into the cell, with the concomitant import of a proton (symport system).
Similarity
Belongs to the major facilitator superfamily. Oligosaccharide:H(+) symporter (OHS) (TC 2.A.1.5) family.
Mass
46.537 kDa
Sequence
MYYLKNTNFWMFGFFFFFYFFIMGAYFPFFPIWLHEVNHISKGDTGIIFACISLFSLLFQPIFGLLSDKLGLRKHLLWVITGMLVMFAPFFIYVFGPLLQVNILLGSIVGGIYLGFIYNAGAPAIEAYIEKASRRSNFEFGRARMFGCVGWALCASIAGIMFTINNQFVFWLGSGCAVILALLLLFSKTDVPSSAKVADAVGANNSAFSLKLALELFKQPKLWLISLYVVGVSCTYDVFDQQFANFFTSFFATGEQGTRVFGYVTTMGELLNASIMFFAPLIVNRIGGKNALLLAGTIMSVRIIGSHSHTALEVVILKTLHMFEIPFLIVGCFKYITSQFEVRFSATIYLVCFCFFKQLAMIFMSVLAGKMYESIGFQGAYLVLGIIRVSFTLISVFTLSGPGPFSLLRRRESVAL

Gene
lacY
Protein
Lactose permease
Organism
Klebsiella oxytoca
Length
416 amino acids
Function
Responsible for transport of beta-galactosides into the cell, with the concomitant import of a proton (symport system).
Similarity
Belongs to the major facilitator superfamily. Oligosaccharide:H(+) symporter (OHS) (TC 2.A.1.5) family.
Mass
46.221 kDa
Sequence
MKLSELAPRERHNFIYFMLFFFFYYFIMSAYFPFFPVWLAEVNHLTKTETGIVFSCISLFAIIFQPVFGLISDKLGLRKHLLWTITILLILFAPFFIFVFSPLLQMNIMAGALVGGVYLGIVFSSRSGAVEAYIERVSRANRFEYGKVRVSGCVGWALCASITGILFSIDPNITFWIASGFALILGVLLWVSKPESSNSAEVIDALGANRQAFSMRTAAELFRMPRFWGFIIYVVGVASVYDVFDQQFANFFKGFFSSPQRGTEVFGFVTTGGELLNALIMFCAPAIINRIGAKNALLIAGLIMSVRILGSSFATSAVEVIILKMLHMFEIPFLLVGTFKYISSAFKGKLSATLFLIGFNLSKQLSSVVLSAWVGRMYDTVGFHQAYLILGCITLSFTVISLFTLKGSKTLLPATA

Gene
lacY
Protein
Lactose permease
Organism
Klebsiella pneumoniae
Length
131 amino acids
Function
Responsible for transport of beta-galactosides into the cell, with the concomitant import of a proton (symport system).
Similarity
Belongs to the major facilitator superfamily. Oligosaccharide:H(+) symporter (OHS) (TC 2.A.1.5) family.
Mass
14.959 kDa
Fragment
single
Sequence
MKFSELAPRERHNFVYFLLFFFFYHFIMSAYFPFFPVWLADVNHLTKTETGIVFSSISLFAIIFQPVFGLMSDKLGLRKHLLWTITVLLILFAPFFIFVFSPLLQMNIIAGSLVGGIYLGIVFSTAPGVGS