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Reviewed November 2010
What is the official name of the ABCA4 gene?
The official name of this gene is “ATP binding cassette subfamily A member 4.”
ABCA4 is the gene's official symbol. The ABCA4 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 ABCA4 gene?
The ABCA4 gene provides instructions for making a protein that is found in the retina, the specialized light-sensitive tissue that lines the back of the eye. Specifically, the ABCA4 protein is produced in the retina's specialized light receptor cells (photoreceptors). The ABCA4 protein is active following phototransduction, the process by which light entering the eye is converted into electrical signals that are transmitted to the brain. Phototransduction leads to the formation of potentially toxic substances. The ABCA4 protein removes one of these substances, called N-retinylidene-PE, from photoreceptor cells.
Does the ABCA4 gene share characteristics with other genes?
The ABCA4 gene belongs to a family of genes called ABC (ATP-binding cassette transporters).
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 ABCA4 gene related to health conditions?
Genetics Home Reference provides additional information about these conditions associated with changes in the ABCA4 gene:
Where is the ABCA4 gene located?
Cytogenetic Location: 1p22
Molecular Location on chromosome 1: base pairs 93,992,837 to 94,121,149
(Homo sapiens Annotation Release 107, GRCh38.p2) (
The ABCA4 gene is located on the short (p) arm of chromosome 1 at position 22.
More precisely, the ABCA4 gene is located from base pair 93,992,837 to base pair 94,121,149 on chromosome 1.
See How do geneticists indicate the location of a gene? in the Handbook.
Where can I find additional information about ABCA4?
You and your healthcare professional may find the following resources about ABCA4 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 ABCA4 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 ABCA4?
You may find definitions for these and many other terms in the Genetics Home Reference Glossary.
See also Understanding Medical Terminology.
References (5 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.