OMIA:000246-9913 : Curly coat, karakul-type in Bos taurus (taurine cattle)

Categories: Integument (skin) phene

Links to possible relevant human trait(s) and/or gene(s) in OMIM: 616676 (gene)

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal dominant

Considered a defect: no

Key variant known: yes

Year key variant first reported: 2014

Species-specific name: Also known as Curly coat

Inheritance: Eldridge et al. (1949) tentatively concluded that this trait could be single-locus dominant, but they could not rule out another possibility requiring two loci. Their data justified the tentativeness of their conclusion.

Mapping: Utilising imputation of sequence variants from the 1000-bull-genome project into each of 3,222 Fleckvieh bulls, each of which had been assessed for the proportion of daughters showing the curly hair trait, Daetwyler et al. (2014) mapped this trait to clusters of keratin genes on chromosomes BTA5 and BTA19.

Molecular basis: Excluding variants found in breeds that do not show this trait, Daetwyler et al. (2014) narrowed the field down to "a missense mutation in KRT27 (c.276C>G; p.Asn92Lys; g.41636961C>G on BTA19; ss699911276)". Strong supporting evidence of the causality of this mutation was found by studying its presence in numerous bulls of the Montbeliarde breed (in which the trait occurs, and which, like Fleckvieh, derives from the Simmental breed) compared with straight-hair breeds. Braun et al. (2018) reported the same variant as being causal in German Angus cattle.

Breeds: Aberdeen-Angus (Cattle) (VBO_0000090), Ayrshire (Cattle) (VBO_0000120), Montbéliarde (Cattle) (VBO_0000306), Simmental (Cattle) (VBO_0000380).
Breeds in which the phene has been documented. (If a likely causal variant has been documented for the phene, see the variant table breeds in which the variant has been reported).

Associated gene:

Symbol Description Species Chr Location OMIA gene details page Other Links
KRT27 keratin 27, type I Bos taurus 19 NC_037346.1 (40982564..40976930) KRT27 Homologene, Ensembl , NCBI gene


By default, variants are sorted chronologically by year of publication, to provide a historical perspective. Readers can re-sort on any column by clicking on the column header. Click it again to sort in a descending order. To create a multiple-field sort, hold down Shift while clicking on the second, third etc relevant column headers.

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 Year Published PubMed ID(s) Acknowledgements
777 Aberdeen-Angus (Cattle) Ayrshire (Cattle) Montbéliarde (Cattle) Simmental (Cattle) Curly hair, karakul-type KRT27 missense Naturally occurring variant ARS-UCD1.2 19 g.40982250G>C c.276C>G p.(N92K) rs384881761 2014 25017103 Some variant information kindly provided or confirmed by Hubert Pausch, including information from Additional Table 6 of Jansen et al. (2013) BMC Genomics201314:446

Cite this entry

Nicholas, F. W., Tammen, I., & Sydney Informatics Hub. (2019). OMIA:000246-9913: Online Mendelian Inheritance in Animals (OMIA) [dataset].


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.

2018 Braun, M., Reinartz, S., Heppelmann, M., Rehage, J., Sürie, C., Distl, O., Metzger, J. :
Curly coat caused by a keratin 27 variant was transmitted from Fleckvieh into German Angus. Anim Genet 49:349-350, 2018. Pubmed reference: 29932459. DOI: 10.1111/age.12669.
2016 Leroy, G., Besbes, B., Boettcher, P., Hoffmann, I., Capitan, A., Baumung, R. :
Rare phenotypes in domestic animals: unique resources for multiple applications. Anim Genet 47:141-53, 2016. Pubmed reference: 26662214. DOI: 10.1111/age.12393.
2014 Daetwyler, H.D., Capitan, A., Pausch, H., Stothard, P., van Binsbergen, R., Brøndum, R.F., Liao, X., Djari, A., Rodriguez, S.C., Grohs, C., Esquerré, D., Bouchez, O., Rossignol, M.N., Klopp, C., Rocha, D., Fritz, S., Eggen, A., Bowman, P.J., Coote, D., Chamberlain, A.J., Anderson, C., VanTassell, C.P., Hulsegge, I., Goddard, M.E., Guldbrandtsen, B., Lund, M.S., Veerkamp, R.F., Boichard, D.A., Fries, R., Hayes, B.J. :
Whole-genome sequencing of 234 bulls facilitates mapping of monogenic and complex traits in cattle. Nat Genet 46:858-65, 2014. Pubmed reference: 25017103. DOI: 10.1038/ng.3034.
2006 Martinez, M.L., Machado, M.A., Nascimento, C.S., Silva, M.V., Teodoro, R.L., Furlong, J., Prata, M.C., Campos, A.L., Guimarães, M.F., Azevedo, A.L., Pires, M.F., Verneque, R.S. :
Association of BoLA-DRB3.2 alleles with tick (Boophilus microplus) resistance in cattle. Genet Mol Res 5:513-24, 2006. Pubmed reference: 17117367.
1991 Larsson, B., Jacobsson, S.O., Bengtsson, B., Alenius, S. :
Congenital curly haircoat as a symptom of persistent infection with bovine virus diarrhoea virus in calves. Arch Virol Suppl 3:143-8, 1991. Pubmed reference: 9210935.
1964 Johansson, I. :
Reduced phalanges and curly coat. Two mutant characters in Swedish cattle Hereditas 28:278-288, 1964.
1949 Eldridge, F.E., Atkeson, F.W., Ibsen, H.L. :
Inheritance of a karakul-type curliness in the hair of Ayrshire cattle Journal of Heredity 40:205-214, 1949. Pubmed reference: 18137064.

Edit History

  • Created by Frank Nicholas on 06 Sep 2005
  • Changed by Frank Nicholas on 17 Oct 2011
  • Changed by Frank Nicholas on 04 Sep 2014
  • Changed by Frank Nicholas on 02 Mar 2019