Rahul Sharma (Editor)

Equilibrative nucleoside transporter 1

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Species  Human
Entrez  2030
Human  Mouse
Ensembl  ENSG00000112759
Equilibrative nucleoside transporter 1

Aliases  SLC29A1, ENT1, Equilibrative nucleoside transporter 1, solute carrier family 29 member 1 (Augustine blood group)
External IDs  MGI: 1927073 HomoloGene: 37985 GeneCards: SLC29A1

Equilibrative nucleoside transporter 1 (ENT1) is a protein that in humans is encoded by the SLC29A1 gene. Multiple alternatively spliced variants, encoding the same protein, have been found for this gene.



This gene is a member of the equilibrative nucleoside transporter family. The gene encodes a transmembrane glycoprotein that localizes to the plasma and mitochondrial membranes and mediates the cellular uptake of nucleosides from the surrounding medium. The protein is categorized as an equilibrative (as opposed to concentrative) transporter that is sensitive to inhibition by nitrobenzylmercaptopurine ribonucleoside (NBMPR). Nucleoside transporters are required for nucleotide synthesis in cells that lack de novo nucleoside synthesis pathways, and are also necessary for the uptake of cytotoxic nucleosides used for cancer and viral chemotherapies.


The gene encoding this protein is located on the short arm of chromosome 6 at 6p21.2-p21.1 on the Watson (plus) strand. It is 14,647 bases in length. The encoded protein has 456 amino acid residues with 11 predicted transmembrane domains. The predicted molecular weight is 50.219 kiloDaltons. The protein is post translationally glycosylated and expressed in all tissue with the apparent exception of skeletal muscle. The highest levels are found in the liver, heart, testis, spleen, lung, kidney and brain.

Interactive pathway map

Click on genes, proteins and metabolites below to link to respective articles.


Mutations in this gene have been associated with H syndrome, pigmented hypertrichosis with insulin dependent diabetes and Faisalabad histiocytosis.


Equilibrative nucleoside transporter 1 Wikipedia