GEPHE SUMMARY Print
Gephebase Gene
Entry Status
Published
GepheID
GP00001970
Main curator
Courtier
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Drosophila simulans
Trait State in Taxon B
Drosophila simulans
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Common Name
-
Synonyms
-
Rank
species
Lineage
Show more ... Brachycera; Muscomorpha; Eremoneura; Cyclorrhapha; Schizophora; Acalyptratae; Ephydroidea; Drosophilidae; Drosophilinae; Drosophilini; Drosophila; Sophophora; melanogaster group; melanogaster subgroup
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B
Common Name
-
Synonyms
-
Rank
species
Lineage
Show more ... Brachycera; Muscomorpha; Eremoneura; Cyclorrhapha; Schizophora; Acalyptratae; Ephydroidea; Drosophilidae; Drosophilinae; Drosophilini; Drosophila; Sophophora; melanogaster group; melanogaster subgroup
NCBI Taxonomy ID
is Taxon B an Infraspecies?
No
GENOTYPIC CHANGE
Generic Gene Name
-
Synonyms
-
String
-
Sequence Similarities
-
GO - Molecular Function
-
GO - Biological Process
-
GO - Cellular Component
-
UniProtKB
GenebankID or UniProtKB
Presumptive Null
Molecular Type
Aberration Type
Deletion Size
-
Molecular Details of the Mutation
Loss of one of the inverted repeats that is present in the wild-type Dsim\Nmy locus and loss of most of the sequence located between the inverted repeats (except for a 93bp element in reverse orientation).
Experimental Evidence
Authors
Tao Y; Masly JP; Araripe L; Ke Y; Hartl DL
Abstract
Sex ratio distortion (sex-ratio for short) has been reported in numerous species such as Drosophila, where distortion can readily be detected in experimental crosses, but the molecular mechanisms remain elusive. Here we characterize an autosomal sex-ratio suppressor from D. simulans that we designate as not much yang (nmy, polytene chromosome position 87F3). Nmy suppresses an X-linked sex-ratio distorter, contains a pair of near-perfect inverted repeats of 345 bp, and evidently originated through retrotransposition from the distorter itself. The suppression is likely mediated by sequence homology between the suppressor and distorter. The strength of sex-ratio is greatly enhanced by lower temperature. This temperature sensitivity was used to assign the sex-ratio etiology to the maturation process of the Y-bearing sperm, a hypothesis corroborated by both light microscope observations and ultrastructural studies. It has long been suggested that an X-linked sex-ratio distorter can evolve by exploiting loopholes in the meiotic machinery for its own transmission advantage, which may be offset by other changes in the genome that control the selfish distorter. Data obtained in this study help to understand this evolutionary mechanism in molecular detail and provide insight regarding its evolutionary impact on genomic architecture and speciation.
RELATED GEPHE
Related Haplotypes
No matches found.
EXTERNAL LINKS
COMMENTS
Nmy suppresses an X-linked sex-ratio distorter named Dox. Nmy contains a pair of near-perfect inverted repeats of 345 bp and originated through retrotransposition from the distorter Dox itself. @Epistasis - No UniProtKD_ID - http://flybase.org/reports/FBal0240568.html
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