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SLC43 family of large neutral amino acid 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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LAT3 (SLC43A1) and LAT4 (SLC43A2) are transporters with system L amino acid transporter activity, along with the structurally and functionally distinct transporters LAT1 and LAT2 that are members of the SLC7 family. LAT3 and LAT4 contain 12 putative TM domains with both N and C termini located intracellularly. They transport neutral amino acids in a manner independent of Na+ and Cl- and with two kinetic components [1-2]. LAT3/SLC43A1 is expressed in human tissues at high levels in the pancreas, liver, skeletal muscle and fetal liver [1] whereas LAT4/SLC43A2 is primarily expressed in the placenta, kidney and peripheral blood leukocytes [2]. SLC43A3 is expressed in vascular endothelial cells [3] but remains to be characterised.


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LAT3 (L-type amino acid transporter 3 / SLC43A1) C Show summary »

Target Id 1201
Nomenclature L-type amino acid transporter 3
Systematic nomenclature SLC43A1
Common abbreviation LAT3
Previous and unofficial names Large neutral amino acids transporter 1 | POV1 | prostate cancer overexpressed gene 1 | PB39 | large neutral amino acids transporter small subunit 3 | solute carrier family 43, member 1 | solute carrier family 43 (amino acid system L transporter), member 1 | solute carrier family 43
Genes SLC43A1 (Hs), Slc43a1 (Mm), Slc43a1 (Rn)
Ensembl ID ENSG00000149150 (Hs), ENSMUSG00000027075 (Mm), ENSRNOG00000008243 (Rn)
UniProtKB AC O75387 (Hs), Q8BSM7 (Mm)
Bioparadigms SLC Tables SLC43A1 (Hs)
L-isoleucine [1]
L-leucine [1]
L-phenylalanine [1]
L-valinol [1]
L-leucinol [1]
L-phenylalaninol [1]
L-valine [1]
L-methionine [1]
Stoichiometry Operates by facilitative diffusion

LAT4 (L-type amino acid transporter 4 / SLC43A2) C Show summary »

EEG1 (Solute carrier family 43 member 3 / SLC43A3) Show summary »


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Further reading

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How to cite this family page

Database page citation:

SLC43 family of large neutral amino acid transporters. Accessed on 24/09/2023. 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.