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Reviewed May 2009
What is the official name of the NYX gene?
The official name of this gene is “nyctalopin.”
NYX is the gene's official symbol. The NYX 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 NYX gene?
The NYX gene provides instructions for making a protein called nyctalopin, which plays an important role in a specialized tissue at the back of the eye called the retina. Within the retina, nyctalopin is located on the surface of light-detecting cells called photoreceptors. The retina contains two types of photoreceptors: rods and cones. Rods are responsible for vision in low light. Cones provide vision in bright light, including color vision.
Nyctalopin appears to play a critical role in normal vision. Studies suggest the protein helps relay visual signals from rods and cones to other retinal cells called bipolar cells. This signaling is an essential step in the transmission of visual information from the eyes to the brain.
How are changes in the NYX gene related to health conditions?
Where is the NYX gene located?
Cytogenetic Location: Xp11.4
Molecular Location on the X chromosome: base pairs 41,445,637 to 41,476,421
(Homo sapiens Annotation Release 107, GRCh38.p2) (
The NYX gene is located on the short (p) arm of the X chromosome at position 11.4.
More precisely, the NYX gene is located from base pair 41,445,637 to base pair 41,476,421 on the X chromosome.
See How do geneticists indicate the location of a gene? in the Handbook.
Where can I find additional information about NYX?
You and your healthcare professional may find the following resources about NYX 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 NYX 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 NYX?
You may find definitions for these and many other terms in the Genetics Home Reference Glossary.
See also Understanding Medical Terminology.
References (11 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.