OMIA:002197-9796 : Coat colour, phaeomelanin dilution, MFSD12-related in Equus caballus
In other species: dog
Categories: Pigmentation phene
Possibly relevant human trait(s) and/or gene(s) (MIM number): 617745 (gene)
Links to MONDO diseases: No links.
Mendelian trait/disorder: yes
Mode of inheritance: Autosomal recessive
Considered a defect: no
Key variant known: yes
Year key variant first reported: 2019
Cross-species summary: pheomelanin dilution, pigment intensity
Species-specific description: Tanaka et al. (2019): "Mushroom is a unique coat color phenotype in Shetland Ponies characterized by the dilution of the chestnut coat color to a sepia tone".
Mapping: Tanaka et al. (2019) mapped this locus to chromosome ECA7.
Molecular basis: Tanaka et al. (2019) provided evidence supporting a frameshift mutation (p.Asp201fs) in the MFSD12 gene as being a likely causal variant for the mushroom coat colour: "This variant was perfectly concordant with phenotype in 96 Shetland Ponies (P = 1.15 × 10-22), was identified in the closely related Miniature Horse for which the mushroom phenotype is suspected to occur (fmu = 0.02), and was absent in 252 individuals from seven additional breeds not reported to have the mushroom phenotype. MFSD12 is highly expressed in melanocytes and variants in this gene in humans, mice, and dogs impact pigmentation."
Currently no 'gene link' to NCBI; and ENSEMBL is incorrectly associating MFSD12 with 'CACTIN'.
|Symbol||Description||Species||Chr||Location||OMIA gene details page||Other Links|
|MFSD12_||Equus caballus||-||no genomic information (-..-)||MFSD12_||Ensembl|
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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||Inferred EVA rsID||Year Published||PubMed ID(s)||Acknowledgements|
|1426||Shetland Pony (Horse)||Coat colour, dilution (mushroom)||MFSD12_||Mu||duplication||Naturally occurring variant||EquCab3.0||7||g.2544518dup||c.600dup||p.(D201fs)||XM_023646425.1; XP_023502193.1; published as NC_009150.3: g.2544512dup (XM_023646425.1:c.600dupC, p.Asp201fs); coordinates in the table have been updated to reflect HGVS nomenclature||2019||31635058|
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.
|2019||Tanaka, J., Leeb, T., Rushton, J., Famula, T.R., Mack, M., Jagannathan, V., Flury, C., Bachmann, I., Eberth, J., McDonnell, S.M., Penedo, M.C.T., Bellone, R.R. :|
|Frameshift variant in MFSD12 explains the mushroom coat color dilution in Shetland Ponies. Genes (Basel) 10:826, 2019. Pubmed reference: 31635058 . DOI: 10.3390/genes10100826.|
|Tanaka, J.L., Leeb, T., Mack, M., Jagannathan, V., Flury, C., Bachmann, I., McDonnell, S., Penedo, M.C., Bellone, R.R. :|
|A frameshift variant in MFSD12 explains the mushroom coat Color dilution in Shetland Ponies. PAG XXVII :W355, 2019.|
- Created by Frank Nicholas on 23 May 2019
- Changed by Frank Nicholas on 23 May 2019
- Changed by Frank Nicholas on 03 Feb 2020
- Changed by Imke Tammen2 on 10 Feb 2022