GEPHE SUMMARY
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Gephebase Gene
Entry Status
Published
GepheID
GP00002308
Main curator
Martin
PHENOTYPIC CHANGE
Trait Category
Trait
Trait State in Taxon A
WT
Trait State in Taxon B
Recessive white from various meat breeds
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Latin Name
Common Name
chicken
Synonyms
Gallus gallus domesticus; chicken; bantam; chickens
Rank
species
Lineage
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pha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae; Phasianinae; Gallus
Parent
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B
Latin Name
Common Name
chicken
Synonyms
Gallus gallus domesticus; chicken; bantam; chickens
Rank
species
Lineage
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pha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae; Phasianinae; Gallus
Parent
NCBI Taxonomy ID
is Taxon B an Infraspecies?
No
GENOTYPIC CHANGE
Generic Gene Name
Tyr
Synonyms
c; Oca1; skc35; albino
String
Sequence Similarities
Belongs to the tyrosinase family.
GO - Molecular Function
GO:0042803 : protein homodimerization activity
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GO - Biological Process
GO:0042438 : melanin biosynthetic process
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GO - Cellular Component
GO:0016021 : integral component of membrane
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UniProtKB
Mus musculus
Mus musculus
Presumptive Null
Molecular Type
Aberration Type
Deletion Size
1-9 bp
Molecular Details of the Mutation
c.817_822del6 p.237-238delDW
Experimental Evidence
Authors
Tobita-Teramoto T; Jang GY; Kino K; Salter DW; Brumbaugh J; Akiyama T
Abstract
We compared tyrosinase cDNA sequences from a line of autosomal albino and Black Silky chickens isolated from cultured melanocytes by reverse transcription-polymerase chain reaction (RT-PCR). Both sources produce a single DNA fragment of predicted normal tyrosinase size. Direct sequencing of the PCR product showed three mutated sites in the tyrosinase gene of the albino chicken. Two silent point mutations and a deletion of six nucleotides (-deltaGACTGG) at 817 bp in the tyrosinase cDNA sequence were observed when compared with the White Leghorn and Black Silky cDNA sequences. The deduced albino chicken tyrosinase protein lacks two amino acids, aspartic acid and tryptophan. The position of these amino acids is consistent with one of the potential copper-binding sites that should be indispensable for function of the enzyme. We speculate that the six-base deletion is responsible for the inactive tyrosinase in this line of albino chickens.
Additional References
RELATED GEPHE
EXTERNAL LINKS
COMMENTS
@Parallelism https://omia.org/OMIA000369/9031/ ; Recessive white is selected in the meat industry (as well as a dominant white)
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