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SLC52 family of riboflavin transporters C

Unless otherwise stated all data on this page refer to the human proteins. Gene information is provided for human (Hs), mouse (Mm) and rat (Rn).


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Riboflavin, also known as vitamin B2, is a precursor of the enzyme cofactors flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). Riboflavin transporters are predicted to possess 10 or 11 TM segments.


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RFVT1 (solute carrier family 52 member 1 / SLC52A1) C Show summary »

Target Id 2571
Nomenclature solute carrier family 52 member 1
Systematic nomenclature SLC52A1
Common abbreviation RFVT1
Previous and unofficial names GPR172B | G protein-coupled receptor 172B | GPCR42 | PAR2 | PERV-A receptor 2 | Porcine endogenous retrovirus A receptor 2 | RFVT1 | Riboflavin transporter 1 | solute carrier family 52 (riboflavin transporter), member 1
Genes SLC52A1 (Hs)
Ensembl ID ENSG00000132517 (Hs)
UniProtKB AC Q9NWF4 (Hs)
Bioparadigms SLC Tables SLC52A1 (Hs)
Endogenous substrates
riboflavin pKm 2.9 [1]
Stoichiometry Unknown

RFVT2 (solute carrier family 52 member 2 / SLC52A2) C Show summary »

RFVT3 (solute carrier family 52 member 3 / SLC52A3) C Show summary »


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Further reading

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How to cite this family page

Database page citation:

SLC52 family of riboflavin transporters. Accessed on 10/12/2023. IUPHAR/BPS Guide to PHARMACOLOGY,

Concise Guide to PHARMACOLOGY citation:

Alexander SP, Kelly E, Mathie A, Peters JA, Veale EL et al. (2021) THE CONCISE GUIDE TO PHARMACOLOGY 2021/22: Transporters. Br J Pharmacol. 178 Suppl 1:S412-S513.