OMIA 001327-9615 : Hyperkeratosis, palmoplantar in Canis lupus familiaris
In a proof-of-concept project to detect a likely causal mutation without GWAS, Sayyab et al. (2016) reported the first use of whole-genome sequencing of a family trio (affected offspring and its two non-affected parents) which enabled them to confirm the causal mutation reported by Drögemüller et al. (2014): "527 single nucleotide variants (SNVs) and 15 indels were found to be homozygous in the affected offspring and heterozygous in the parents. Using the computer software packages ANNOVAR and SIFT to functionally annotate coding sequence differences and to predict their functional effect, resulted in seven candidate variants located in six different genes. Of these, only FAM83G:c155G>C (p.R52P) was found to be concordant in eight additional cases and 16 healthy Kromfohrl änder dogs."Clinical features: As summarised by Drögemüller et al. (2014): "Hyperkeratosis of the foot pads is noticed by the owners of both breeds at 4–5 months of age and involves all footpads. With time horny protrusions appear on the rims of the footpads and the pad surface becomes hard and develops cracks . . . . Affected animals avoid walking on irregular surfaces and may go lame. The nails of affected dogs are very hard and seem to grow faster. We noticed a duller, less wiry, softer coat on an affected Kromfohrländer . . . . Similar clinical symptoms were noted on 5 HFH affected Irish Terriers." Breeds: Irish Terrier, Kromfohrländer. Associated gene:
|Symbol||Description||Species||Chr||Location||OMIA gene details page||Other Links|
|FAM83G||family with sequence similarity 83, member G||Canis lupus familiaris||5||NC_006587.3 (41054805..41085156)||FAM83G||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.
|Breed(s)||Variant Phenotype||Gene||Allele||Type of Variant||Reference Sequence||Chr.||g. or m.||c. or n.||p.||Verbal Description||EVA ID||Year Published||PubMed ID(s)||Acknowledgements|
|Irish Terrier Kromfohrländer||Hyperkeratosis, palmoplantar||FAM83G||missense||CanFam3.1||5||g.41055619G>C||c.155G>C||p.R52P||2014||24832243||Variant coordinates obtained from or confirmed by EBI's Some Effect Predictor (VEP) tool|
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.
|2016||Sayyab, S., Viluma, A., Bergvall, K., Brunberg, E., Jagannathan, V., Leeb, T., Andersson, G., Bergström, T.F. :|
|Whole-Genome Sequencing of a Canine Family Trio Reveals a FAM83G Variant Associated with Hereditary Footpad Hyperkeratosis. G3 (Bethesda) :, 2016. Pubmed reference: 26747202. DOI: 10.1534/g3.115.025643.|
|2014||Drögemüller, M., Jagannathan, V., Becker, D., Drögemüller, C., Schelling, C., Plassais, J., Kaerle, C., Dufaure de Citres, C., Thomas, A., Müller, E.J., Welle, M.M., Roosje, P., Leeb, T. :|
|A mutation in the FAM83G gene in dogs with hereditary footpad hyperkeratosis (HFH). PLoS Genet 10:e1004370, 2014. Pubmed reference: 24832243. DOI: 10.1371/journal.pgen.1004370.|
|2003||Schleifer, S.G., Versteeg, S.A., van Oost, B., Willemse, T. :|
|Familial footpad hyperkeratosis and inheritance of keratin 2, keratin 9, and desmoglein 1 in two pedigrees of Irish Terriers American Journal of Veterinary Research 64:715-20, 2003. Pubmed reference: 12828257.|
|2000||Binder, H., Arnold, S., Schelling, C., Suter, M., Wild, P. :|
|Palmoplantar hyperkeratosis in Irish terriers: evidence of autosomal recessive inheritance Journal of Small Animal Practice 41:52-55, 2000. Pubmed reference: 10701186.|
- Created by Frank Nicholas on 05 Oct 2005
- Changed by Frank Nicholas on 04 Apr 2014
- Changed by Frank Nicholas on 20 May 2014
- Changed by Frank Nicholas on 20 Jan 2016