GEPHE SUMMARY Print
Gephebase Gene
Entry Status
Published
GepheID
GP00002110
Main curator
Courtier
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Canis familiaris
Trait State in Taxon B
Canis familiaris - 3 breeds with a screw tail
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Common Name
dog
Synonyms
Canis canis; Canis domesticus; Canis familiaris; dog; dogs
Rank
subspecies
Lineage
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 A an Infraspecies?
No
Taxon B
Common Name
dog
Synonyms
Canis canis; Canis domesticus; Canis familiaris; dog; dogs
Rank
subspecies
Lineage
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?
Yes
Taxon B Description
Bulldog; French Bulldog and Boston Terrier
GENOTYPIC CHANGE
Generic Gene Name
Dvl2
Synonyms
-
Sequence Similarities
Belongs to the DSH family.
UniProtKB
Mus musculus
GenebankID or UniProtKB
Presumptive Null
Yes
Molecular Type
Aberration Type
Deletion Size
1-9 bp
Molecular Details of the Mutation
single base deletion found on CFA 5(g.32195043_32195044del) that is homozygous in the three screw tail breeds - predicted to lead to a frameshift mutation and cause a premature stop codon that truncates the translated protein by 23 amino acids (p.Pro684LeufsX26) - 26 altered amino acids are predicted to be present in the highly conserved C-terminus of the mutant protein.
Experimental Evidence
Authors
Mansour TA; Lucot K; Konopelski SE; Dickinson PJ; Sturges BK; Vernau KL; Choi S; Stern JA; et al. ... show more
Abstract
Domestic dog breeds exhibit remarkable morphological variations that result from centuries of artificial selection and breeding. Identifying the genetic changes that contribute to these variations could provide critical insights into the molecular basis of tissue and organismal morphogenesis. Bulldogs, French Bulldogs and Boston Terriers share many morphological and disease-predisposition traits, including brachycephalic skull morphology, widely set eyes and short stature. Unlike other brachycephalic dogs, these breeds also exhibit vertebral malformations that result in a truncated, kinked tail (screw tail). Whole genome sequencing of 100 dogs from 21 breeds identified 12.4 million bi-allelic variants that met inclusion criteria. Whole Genome Association of these variants with the breed defining phenotype of screw tail was performed using 10 cases and 84 controls and identified a frameshift mutation in the WNT pathway gene DISHEVELLED 2 (DVL2) (Chr5: 32195043_32195044del, p = 4.37 X 10-37) as the most strongly associated variant in the canine genome. This DVL2 variant was fixed in Bulldogs and French Bulldogs and had a high allele frequency (0.94) in Boston Terriers. The DVL2 variant segregated with thoracic and caudal vertebral column malformations in a recessive manner with incomplete and variable penetrance for thoracic vertebral malformations between different breeds. Importantly, analogous frameshift mutations in the human DVL1 and DVL3 genes cause Robinow syndrome, a congenital disorder characterized by similar craniofacial, limb and vertebral malformations. Analysis of the canine DVL2 variant protein showed that its ability to undergo WNT-induced phosphorylation is reduced, suggesting that altered WNT signaling may contribute to the Robinow-like syndrome in the screwtail breeds.
Additional References
RELATED GEPHE
Related Genes
No matches found.
Related Haplotypes
No matches found.
EXTERNAL LINKS
COMMENTS
the screw tail phenotype corresponds to malformed and fused vertebrae and lack of approximately 8 to 15 caudal vertebrae; which normally form the canine tail. Analogous frameshift mutations in the human DVL1 and DVL3 genes cause Robinow syndrome (a congenital disorder characterized by similar craniofacial; limb and vertebral malformations).
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