In other species: domestic guinea pig

Possibly relevant human trait(s) and/or gene(s) (MIM number): 614097

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2000

Cross-species summary: Also known as acatalasemia.

Molecular basis: By cloning and sequencing a very likely candidate gene (based on knowledge of the biochemical and physiological properties of the enzyme catalase in affected dogs), Nakamura et al. (2000) reported that the canine disorder in Beagles is due to a missense mutation [in the catalase gene (CAT),] leading to the substitution of alanine(327) (GCT) by threonine (ACT)".

Prevalence: Noting that the original discovery of the likely causal variant (c.979G>A; p.Ala327Thr) was in a Beagle colony, Donner et al. (2016) reported that "To our knowledge, presence and manifestation of acatalasemia due to the aforementioned CAT variant has not been previously documented in the pet Beagle population. We therefore note that we identified pet Beagle carriers, and a tenmonth-old mutant homozygous Beagle through panel screening. During this investigation, the genetically affected Beagle developed gangrene of the oral cavity leading to the removal of three teeth at the age of eighteen months, which could be a manifestation of acatalasemia".

Donner et al. (2016) reported heterozygosity for the same c.979G>A (p.Ala327Thr) variant in one American Foxhound.

Breeds: American Foxhound, Beagle.

Associated gene: