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Reviewed December 2007
What is the official name of the HPRT1 gene?
The official name of this gene is “hypoxanthine phosphoribosyltransferase 1.”
HPRT1 is the gene's official symbol. The HPRT1 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 HPRT1 gene?
The HPRT1 gene provides instructions for producing an enzyme called hypoxanthine phosphoribosyltransferase 1. This enzyme allows cells to recycle purines, a type of building block of DNA and its chemical cousin RNA. Manufacturing purines uses more energy and takes more time than recycling purines, which makes recycling these molecules more efficient. Recycling purines ensures that cells have a plentiful supply of building blocks for the production of DNA and RNA. The process of recycling purines is also known as the purine salvage pathway.
How are changes in the HPRT1 gene related to health conditions?
Where is the HPRT1 gene located?
Cytogenetic Location: Xq26.1
Molecular Location on the X chromosome: base pairs 134,452,842 to 134,500,668
(Homo sapiens Annotation Release 107, GRCh38.p2) (
The HPRT1 gene is located on the long (q) arm of the X chromosome at position 26.1.
More precisely, the HPRT1 gene is located from base pair 134,452,842 to base pair 134,500,668 on the X chromosome.
See How do geneticists indicate the location of a gene? in the Handbook.
Where can I find additional information about HPRT1?
You and your healthcare professional may find the following resources about HPRT1 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 HPRT1 gene or gene products?
See How are genetic conditions and genes named? in the Handbook.
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 HPRT1?
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.