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Reviewed March 2008

What is the official name of the SLC7A7 gene?

The official name of this gene is “solute carrier family 7 (amino acid transporter light chain, y+L system), member 7.”

SLC7A7 is the gene's official symbol. The SLC7A7 gene is also known by other names, listed below.

Read more about gene names and symbols on the About page.

What is the normal function of the SLC7A7 gene?

The SLC7A7 gene provides instructions for producing a protein called y+L amino acid transporter 1 (y+LAT-1), which is involved in transporting certain building blocks of protein (amino acids), namely lysine, arginine, and ornithine. The transportation of amino acids from the small intestines and kidneys to the rest of the body is necessary for the body to be able to use proteins. The y+LAT-1 protein forms one part (the light subunit) of a complex called the heterodimeric cationic amino acid transporter. This subunit is responsible for binding to the amino acids that are transported.

Does the SLC7A7 gene share characteristics with other genes?

The SLC7A7 gene belongs to a family of genes called SLC (solute carriers).

A gene family is a group of genes that share important characteristics. Classifying individual genes into families helps researchers describe how genes are related to each other. For more information, see What are gene families? in the Handbook.

How are changes in the SLC7A7 gene related to health conditions?

lysinuric protein intolerance - caused by mutations in the SLC7A7 gene

More than 40 mutations in the SLC7A7 gene have been found to cause lysinuric protein intolerance. All of these mutations impair the y+LAT-1 protein's ability to transport amino acids. People with lysinuric protein intolerance who are of Finnish descent typically have the same mutation. This mutation (written as IVS6-2A>T) disrupts the way the gene's instructions are used to make the y+LAT-1 protein, causing the protein to be misplaced in the cell.

Mutations in the y+LAT-1 protein disrupt the transportation of amino acids, leading to a shortage of lysine, arginine, and ornithine in the body and an abnormally large amount of these amino acids in urine. The abnormal transportation and shortage of these amino acids in various tissues of the body leads to the signs and symptoms of lysinuric protein intolerance.

Where is the SLC7A7 gene located?

Cytogenetic Location: 14q11.2

Molecular Location on chromosome 14: base pairs 22,773,222 to 22,819,811

(Homo sapiens Annotation Release 107, GRCh38.p2) (NCBIThis link leads to a site outside Genetics Home Reference.)

The SLC7A7 gene is located on the long (q) arm of chromosome 14 at position 11.2.

The SLC7A7 gene is located on the long (q) arm of chromosome 14 at position 11.2.

More precisely, the SLC7A7 gene is located from base pair 22,773,222 to base pair 22,819,811 on chromosome 14.

See How do geneticists indicate the location of a gene? in the Handbook.

Where can I find additional information about SLC7A7?

You and your healthcare professional may find the following resources about SLC7A7 helpful.

You may also be interested in these resources, which are designed for genetics professionals and researchers.

What other names do people use for the SLC7A7 gene or gene products?

  • LAT3
  • LPI
  • Y+LAT1
  • y+LAT-1

Where can I find general information about genes?

The Handbook provides basic information about genetics in clear language.

These links provide additional genetics resources that may be useful.

What glossary definitions help with understanding SLC7A7?

acids ; amino acid ; arginine ; carrier ; cell ; gene ; lysine ; mutation ; protein ; solute ; subunit

You may find definitions for these and many other terms in the Genetics Home Reference Glossary.

See also Understanding Medical Terminology.

References (7 links)


The resources on this site should not be used as a substitute for professional medical care or advice. Users seeking information about a personal genetic disease, syndrome, or condition should consult with a qualified healthcare professional. See How can I find a genetics professional in my area? in the Handbook.

Reviewed: March 2008
Published: February 8, 2016