OMIA:002536-9615 : Cataract, FYCO1-related in Canis lupus familiaris (dog)

Categories: Vision / eye phene

Links to possible relevant human trait(s) and/or gene(s) in OMIM: 610019 (trait) , 607182 (gene)

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal recessive

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2022

Species-specific name: Juvenile cataract (FYCO1-frameshift deletion)

Species-specific description: Other forms of inherited cataract have been been described in other breeds, for examples see 'OMIA:001758-9615 - Cataract, early onset, HSF4-related' and 'OMIA:000168-9615 -Cataract, generic'.

Inheritance: Rudd Garces et al. (2022) "investigated an inbred family of Wirehaired Pointing Griffon dogs in which three offspring were affected by juvenile cataract. The pedigree suggested monogenic autosomal recessive inheritance of the trait."

Molecular basis: Rudd Garces et al. (2022): "Whole-genome sequencing of an affected dog revealed 12 protein-changing variants that were not present in 566 control genomes, of which two were located in functional candidate genes, FYCO1 and CRYGB. Targeted genotyping of both variants in the investigated family excluded CRYGB and revealed perfect co-segregation of the FYCO1 variant with the juvenile cataract phenotype. This variant, FYCO1:c.2024delG, represents a 1 bp frameshift deletion predicted to truncate ~50% of the open reading frame p.(Ser675Thrfs*5). FYCO1 encodes the FYVE and coiled-coil domain autophagy adaptor 1, a known regulator of lens autophagy, which is required for the normal homeostasis in the eye."

Clinical features: Rudd Garces et al. (2022): "A breeder noticed signs of body imbalance in the affected puppies and difficulties following the other littermates at 8 weeks of age. Private clinical and ophthalmological examinations revealed the presence of opaque spots in the eyes and blindness, corresponding to signs of juvenile cataract".

Breed: Wirehaired Pointing Griffon (Dog) (VBO_0201427).
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
FYCO1 FYVE and coiled-coil domain containing 1 Canis lupus familiaris 20 NC_051824.1 (43002992..43076845) FYCO1 Homologene, Ensembl , NCBI gene


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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
1436 Wirehaired Pointing Griffon (Dog) Juvenile cataract FYCO1 deletion, small (<=20) Naturally occurring variant UU_Cfam_GSD_1.0 20 g.42952995del c.2024delG p.(S675Tfs*5) XM_038566669.1; XP_038422597.1 2022 35205377

Cite this entry

Nicholas, F. W., Tammen, I., & Sydney Informatics Hub. (2024). OMIA:002536-9615: 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.

2022 Rudd Garces, G., Christen, M., Loechel, R., Jagannathan, V., Leeb, T. :
FYCO1 frameshift deletion in Wirehaired Pointing Griffon dogs with juvenile cataract. Genes (Basel) 13:334, 2022. Pubmed reference: 35205377. DOI: 10.3390/genes13020334.
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.

Edit History

  • Created by Frank Nicholas on 10 Mar 2022
  • Changed by Frank Nicholas on 10 Mar 2022
  • Changed by Imke Tammen2 on 18 May 2022
  • Changed by Imke Tammen2 on 22 May 2024