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Solute carrier family 6 (neutral amino acid transporter), member 18
Symbols SLC6A18 ; Xtrp2
External IDs OMIM610300 MGI1336892 HomoloGene40785 IUPHAR: 941 GeneCards: SLC6A18 Gene
Species Human Mouse
Entrez 348932 22598
Ensembl ENSG00000164363 ENSMUSG00000021612
UniProt Q96N87 O88576
RefSeq (mRNA) NM_182632 NM_001040692
RefSeq (protein) NP_872438 NP_001035782
Location (UCSC) Chr 5:
1.23 – 1.25 Mb
Chr 13:
73.66 – 73.68 Mb
PubMed search [1] [2]

Solute carrier family 6, member 18 also known as SLC6A18 is a protein which in humans is encoded by the SLC6A18 gene.[1][2]


The SLC6 family of proteins, which includes SLC6A18, acts as specific transporters for neurotransmitters, amino acids, and osmolytes like betaine, taurine, and creatine. SLC6 proteins are sodium cotransporters that derive the energy for solute transport from the electrochemical gradient for sodium ions.[2][3]

Clinical significance[edit]

Mutations in the SLC6A18 gene are associated with iminoglycinuria.[4]


  1. ^ Strausberg RL, Feingold EA, Grouse LH, et al. (December 2002). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932. 
  2. ^ a b Höglund PJ, Adzic D, Scicluna SJ, Lindblom J, Fredriksson R (October 2005). "The repertoire of solute carriers of family 6: identification of new human and rodent genes". Biochem. Biophys. Res. Commun. 336 (1): 175–89. doi:10.1016/j.bbrc.2005.08.048. PMID 16125675. 
  3. ^ "Entrez Gene: SLC6A18". 
  4. ^ Bröer S, Bailey CG, Kowalczuk S, Ng C, Vanslambrouck JM, Rodgers H, Auray-Blais C, Cavanaugh JA, Bröer A, Rasko JE (November 2008). "Iminoglycinuria and hyperglycinuria are discrete human phenotypes resulting from complex mutations in proline and glycine transporters". J. Clin. Invest. 118 (12): 3881–92. doi:10.1172/JCI36625. PMC 2579706. PMID 19033659. 

Further reading[edit]

This article incorporates text from the United States National Library of Medicine, which is in the public domain.