General Information and Variability Data of DT
DT ID DTD0475
Gene Name SLC7A8
Protein Name L-type amino acid transporter 2
Synonyms LAT2; LPI-PC1; Large neutral amino acids transporter small subunit 2; SLC7A8; Solute carrier family 7 member 8; hLAT2
Gene ID
23428
UniProt ID
Q9UHI5
TCDB ID
2.A.3.8.20
DT Family Amino Acid-Polyamine-Organocation (APC) Family
L-type Amino Acid Transporter (LAT) Family
Tissue Specificity Strongest expression is observed in kidney andmoderate expression in placenta and brain, followed by liver,prostate, testis, ovary, lymph node, thymus, spleen, skeletalmuscle and heart. Also expressed in fetal liver as well as in theretinal pigment epithelial cell line ARPE-19 and the intestinalepithelial cell line Caco-2.
Function This transporter plays an essential role in the reabsorption of neutral amino acids from the epithelial cells to the bloodstream in the kidney, such as alanine, serine, threonine, cysteine, phenylalanine, tyrosine, leucine, arginine and tryptophan. Acts as an amino acid exchanger. Has higher affinity for L-phenylalanine than LAT1 but lower affinity for glutamine and serine. L-alanine is transported at physiological concentrations. Plays a role in basolateral (re)absorption of neutral amino acids. Involved in the uptake of methylmercury (MeHg) when administered as the L-cysteine or D,L-homocysteine complexes, and hence plays a role in metal ion homeostasis and toxicity. Involved in the cellular activity of small molecular weight nitrosothiols, via the stereoselective transport of L-nitrosocysteine (L-CNSO) across the transmembrane.
Disease(s) Dietary shortage [ICD-11: 5B7Z]
Genetic Polymorphisms & Epigenetic Regulations of DT
Species-, Tissue- and Disease-specific Protein Abundances of DT
Approved Drug(s) Transported by This DT Glycine Drug Info Dietary shortage [ICD-11: 5B7Z] Approved [1]
L-alanine Drug Info Glioma [ICD-11: 2A00.0] Approved [1]
L-phenylalanine Drug Info Dietary shortage [ICD-11: 5B7Z] Approved [2]
L-proline Drug Info Dietary shortage [ICD-11: 5B7Z] Approved [1]
L-tryptophan Drug Info Depression [ICD-11: 6A8Z] Approved [1]
L-tyrosine Drug Info Dietary shortage [ICD-11: 5B7Z] Approved [1]
Endogenous Substrate(s) Asparagine; Methionine; Cystine
Drug-DT Affinity Assessed by Cell Line
Drug(s) with Drug-DT Affinity Data L-phenylalanine Drug Info Xenopus oocytes-LAT2 Km = 12.2 microM [2]
References
1 The Transporter Classification Database (TCDB): recent advances. Nucleic Acids Res. 2016 Jan 4;44(D1):D372-9. (ID: 2.A.3.8.20)
2 Quantifying the relative contributions of different solute carriers to aggregate substrate transport. Sci Rep. 2017 Jan 16;7:40628.

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