GEPHE SUMMARY Print
Trait State in Taxon A
Canis familiaris - various breeds
Trait State in Taxon B
Canis familiaris - various breeds _ brown color
gray wolf; grey wolf; Canis lupus Linnaeus, 1758
Show more ... rata; Gnathostomata; Teleostomi; Euteleostomi; Sarcopterygii; Dipnotetrapodomorpha; Tetrapoda; Amniota; Mammalia; Theria; Eutheria; Boreoeutheria; Laurasiatheria; Carnivora; Caniformia; Canidae; Canis
NCBI Taxonomy ID
is Taxon A an Infraspecies?
Canis canis; Canis domesticus; Canis familiaris; dog; dogs; Canis familiaris Linnaeus, 1758; Canis lupus familiaris Linnaeus, 1758
Show more ... tomata; Teleostomi; Euteleostomi; Sarcopterygii; Dipnotetrapodomorpha; Tetrapoda; Amniota; Mammalia; Theria; Eutheria; Boreoeutheria; Laurasiatheria; Carnivora; Caniformia; Canidae; Canis; Canis lupus
NCBI Taxonomy ID
is Taxon B an Infraspecies?
Generic Gene Name
b; isa; Oca3; TRP1; Tyrp; TRP-1; brown; Tyrp-1
Belongs to the tyrosinase family.
GO - Molecular Function
GO:0042803 : protein homodimerization activity ... show more
GO - Biological Process
GO:0032438 : melanosome organization ... show more
GO - Cellular Component
GO:0016021 : integral component of membrane ... show more
SNP Coding Change
Molecular Details of the Mutation
|Taxon A||Taxon B||Position|
Schmutz SM; Berryere TG; Goldfinch AD
We used PCR amplification of cDNA prepared from skin biopsies to determine the nearly full-length, protein-coding sequence of dog TYRP1, and to define sequence variants potentially responsible for the B locus. One common variant contained a premature stop codon in exon 5 (Q331ter), and the other deleted a proline residue in exon 5 (345delP). A third variant in exon 2 (S41C) occurred less frequently. We genotyped 43 brown (including brown and white) and 34 black (including tricolor, black-and-tan, and black and white) dogs. All 43 of the brown group carried two or more of these sequence variants likely to interfere with TYRP1 function, whereas 0 of 34 in the black group carried two or more of these variants (10 carried one variant). We also genotyped 13 black-nosed and 10 brown-nosed dogs whose coat color was described as red, yellow, gold, apricot, or orange (including various degrees of white). All these dogs were homozygous for a R306X MC1R variant shown to be associated with these coat color phenotypes. The black or brown nose correlated perfectly with the absence or presence of the same three TYRP1 variants described above. TYRP1 was linkage mapped to dog chromosome 11, with a SNP in exon 7.
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