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solute carrier family 7 (cationic amino acid transporter, y+ system), member 9
Symbol SLC7A9
Alt. symbols CSNU3
Entrez 11136
HUGO 11067
OMIM 604144
RefSeq NM_014270
UniProt P82251
Other data
Locus Chr. 19 q13.1

Solute carrier family 7 (cationic amino acid transporter, y+ system), member 9 also known as SLC7A9 is a protein which in humans is encoded by the SLC7A9 gene.[1]


This gene encodes a protein that belongs to a family of light subunits of amino acid transporters. This protein plays a role in the high-affinity and sodium-independent transport of cystine and neutral and dibasic amino acids, and appears to function in the reabsorption of cystine in the kidney tubule.[1] The protein associates with the protein coded for by SLC3A1.[2]

Clinical significance[edit]

Mutations in this gene cause non-type I cystinuria, a disease that leads to cystine stones in the urinary system due to impaired transport of cystine and dibasic amino acids.[1]

See also[edit]


  1. ^ a b c "SLC7A9". 
  2. ^ Feliubadaló L, Font M, Purroy J, Rousaud F, Estivill X, Nunes V, Golomb E, Centola M, Aksentijevich I, Kreiss Y, Goldman B, Pras M, Kastner DL, Pras E, Gasparini P, Bisceglia L, Beccia E, Gallucci M, de Sanctis L, Ponzone A, Rizzoni GF, Zelante L, Bassi MT, George AL, Manzoni M, De Grandi A, Riboni M, Endsley JK, Ballabio A, Borsani G, Reig N, Fernández E, Estévez R, Pineda M, Torrents D, Camps M, Lloberas J, Zorzano A, Palacín M (September 1999). "Non-type I cystinuria caused by mutations in SLC7A9, encoding a subunit (bo,+AT) of rBAT". Nat. Genet. 23 (1): 52–7. doi:10.1038/12652. PMID 10471498. 
