OMIA:001481-9615 : Achromatopsia-2, CNGA3-related in Canis lupus familiaris (dog)

In other species: sheep

Categories: Vision / eye phene

Links to possible relevant human trait(s) and/or gene(s) in OMIM: 216900 (trait) , 600053 (gene)

Links to relevant human diseases in MONDO:

Mendelian trait/disorder: yes

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2015

Species-specific name: Cone degeneration - hemeralopia/achromatopsia

Molecular basis: Tanaka et al. (2015): "a missense mutation in exon 7 (c.C1270T/p.R424W) in the German shepherd breed and a 3nt deletion in exon 7 (c.1931_1933delTGG/p.V644del) in Labrador retrievers"

Breeds: German Shepherd Dog (Dog) (VBO_0200577), Labrador Retriever (Dog) (VBO_0200800).
Breeds in which the phene has been documented. (If a likely causal variant has been documented for the phene, see the variant table breeds in which the variant has been reported).

Associated gene:

Symbol Description Species Chr Location OMIA gene details page Other Links
CNGA3 cyclic nucleotide gated channel alpha 3 Canis lupus familiaris 10 NC_051814.1 (45150463..45105862) CNGA3 Homologene, Ensembl , NCBI gene


By default, variants are sorted chronologically by year of publication, to provide a historical perspective. Readers can re-sort on any column by clicking on the column header. Click it again to sort in a descending order. To create a multiple-field sort, hold down Shift while clicking on the second, third etc relevant column headers.

WARNING! Inclusion of a variant in this table does not automatically mean that it should be used for DNA testing. Anyone contemplating the use of any of these variants for DNA testing should examine critically the relevant evidence (especially in breeds other than the breed in which the variant was first described). If it is decided to proceed, the location and orientation of the variant sequence should be checked very carefully.

Since October 2021, OMIA includes a semiautomated lift-over pipeline to facilitate updates of genomic positions to a recent reference genome position. These changes to genomic positions are not always reflected in the ‘acknowledgements’ or ‘verbal description’ fields in this table.

OMIA Variant ID Breed(s) Variant Phenotype Gene Allele Type of Variant Source of Genetic Variant Reference Sequence Chr. g. or m. c. or n. p. Verbal Description EVA ID Year Published PubMed ID(s) Acknowledgements
548 Labrador Retriever (Dog) Achromatopsia-2 CNGA3 deletion, small (<=20) Naturally occurring variant CanFam3.1 10 g.44234198_44234200del c.1931_1933del p.(V644del) NM_001301112.1; published as c.1931_1933delTGG rs852784090 2015 26407004 Genomic coordinates in CanFam3.1 and EVA ID provided by Robert Kuhn
97 German Shepherd Dog (Dog) Achromatopsia-2 CNGA3 missense Naturally occurring variant CanFam3.1 10 g.44234861C>T c.1270C>T p.(R424W) NM_001301112.1; NP_001288041.1 2015 26407004 Genomic position in CanFam3.1 provided by Mateo Etcheveste.

Cite this entry

Nicholas, F. W., Tammen, I., & Sydney Informatics Hub. (2023). OMIA:001481-9615: Online Mendelian Inheritance in Animals (OMIA) [dataset].


Note: the references are listed in reverse chronological order (from the most recent year to the earliest year), and alphabetically by first author within a year.

2021 Genetics Committee of the American College of Veterinary Opthalmologists :
The Blue Book: Ocular disorders presumed to be inherited in purebred dogs. 13th Edition , 2021.
2015 Tanaka, N., Dutrow, E.V., Miyadera, K., Delemotte, L., MacDermaid, C.M., Reinstein, S.L., Crumley, W.R., Dixon, C.J., Casal, M.L., Klein, M.L., Aguirre, G.D., Tanaka, J.C., Guziewicz, K.E. :
Canine CNGA3 gene mutations provide novel insights into human achromatopsia-associated channelopathies and treatment. PLoS One 10:e0138943, 2015. Pubmed reference: 26407004. DOI: 10.1371/journal.pone.0138943.

Edit History

  • Created by Frank Nicholas on 31 Dec 2015
  • Changed by Frank Nicholas on 31 Dec 2015
  • Changed by Imke Tammen2 on 16 Jun 2023