OMIA 002165-9615 : Ehlers-Danlos syndrome, classic type, 1 in Canis lupus familiaris

In other species: domestic cat

Possibly relevant human trait(s) and/or gene(s)s (MIM numbers): 130000 (trait) , 120215 (gene)

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal Dominant

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2019

Molecular basis: "Whole-genome sequencing [of two affected dogs - one a Labrador and the other mixed-breed - by Bauer et al., 2019] revealed de novo mutations of COL5A1 in both cases, confirming the diagnosis of the classical form of EDS. The heterozygous COL5A1 p.Gly1013ValfsTer260 mutation characterized in case 1 introduced a premature termination codon and would be expected to result in α1(V) mRNA nonsense-mediated mRNA decay and collagen V haploinsufficiency. . . . In the second case, DNA sequencing demonstrated a p.Gly1571Arg missense variant in the COL5A1 gene. . . . such a glycine substitution would be expected to destabilize the strict molecular structure of the collagen V triple helix and thus affect protein stability and/or integration of the mutant collagen into the collagen V/collagen I heterotypic dermal fibrils."

Clinical features: "On physical examination, evidence of generalized joint hyperextensibility with a range of motion greater than 180° (Figure 1) and skin hyperextensibility (Figure 2 and Figure 3) and fragility was noted" in an affected Labrador Retriever (Bauer et al. 2019). Two affected mixed breed dogs also showed marked skin hyperextensibility. Bruising and wounds were noted to occur after only mild trauma in these dogs. Joint hypermobility, a typical sign for classical Ehlers-Danlos, was not investiagted in the affected mixed breed dogs (Bauer et al. 2019).

Associated gene:

Symbol Description Species Chr Location OMIA gene details page Other Links
COL5A1 collagen, type V, alpha 1 Canis lupus familiaris 9 NC_051813.1 (51583512..51733920) COL5A1 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
Labrador Retriever Ehlers-Danlos syndrome, classic type, 1 COL5A1 deletion, small (<=20) CanFam3.1 9 g.50806169delG c.3038delG p.(G1013Vfs*260) XM_022423936.1,c.3038delG. This "variant arose by a de novo mutation event during the development of the mother." (Bauer et al., 2019) 2019 31546637
Mixed breed Ehlers-Danlos syndrome, classic type, 1 COL5A1 missense CanFam3.1 9 g.50832936G>A c.4711G>A p.(G1571R) XM_022423936.1,c.4711G>A; XP_022279644.1,p.(Gly1571Arg) 2019 31546637


2019 Bauer, A., Bateman, J.F., Lamandé, S.R., Hanssen, E., Kirejczyk, S.G.M., Yee, M., Ramiche, A., Jagannathan, V., Welle, M., Leeb, T., Bateman, F.L. :
Identification of Two Independent <i>COL5A1</i> Variants in Dogs with Ehlers-Danlos Syndrome. Genes (Basel) 10:, 2019. Pubmed reference: 31546637. DOI: 10.3390/genes10100731.

Edit History

  • Created by Frank Nicholas on 26 Sep 2019
  • Changed by Frank Nicholas on 26 Sep 2019
  • Changed by Tosso Leeb on 26 Sep 2019