1113630962ENSG00000021488ENSMUSG00000030492P82251Q9QXA6NM_001126335NM_001243036NM_014270NM_001199015NM_001199016NM_021291NP_001119807NP_001229965NP_055085NP_001185944NP_001185945NP_067266b(0,+)-type amino acid transporter 1, also known as b(0,+)AT1, is a protein which in humans is encoded by the SLC7A9 gene.

[5] 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.

[6] 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.

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