FB2026_02 , released June 18, 2026
FB2026_02 , released June 18, 2026
Allele: Dmel\stil2
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General Information
Symbol
Dmel\stil2
Species
D. melanogaster
Name
FlyBase ID
FBal0016190
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Cytology
Description

Amino acid replacement: G58R.

Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
Nucleotide change:

G12570620M

Amino acid change:

G58R | stil-PA

Reported amino acid change:
Comment:

site of nucleic acid difference inferred by FlyBase curator based on reported amino acid change

Variant Molecular Consequences
Associated Sequence Data
DNA sequence
Protein sequence
 
Expression Data
Reporter Expression
Additional Information
Statement
Reference
 
Marker for
Reflects expression of
Reporter construct used in assay
Human Disease Associations
Disease Ontology (DO) Annotations
Models Based on Experimental Evidence ( 0 )
Disease
Evidence
References
Modifiers Based on Experimental Evidence ( 0 )
Disease
Interaction
References
Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
 
Disease-implicated variant(s)
 
Phenotypic Data
Phenotypic Class
Phenotype Manifest In
Detailed Description
Statement
Reference

Hemizygous ovaries have relatively normal egg chambers, although the oocyte is often in an abnormal position.

Females have small ovaries, development begins to arrest at stage 4 or 5 of oogenesis and leads to the accumulation of a chain of spherical egg chambers during early oogenesis. Egg chambers remain small during subsequent stages and many degenerate after mid-oogenesis. Actin cytoskeleton is disrupted in ovaries. Follicle cells function normally. Posterior migration of the follicle cells occurs normally but they secrete reduced dorsal appendages and an 'open-ended' chorion.

Females exhibit reduced quantities of yolk in the oocytes due to defects in the uptake mechanism of vitellogenin: complete failure of endocytotic vitellogenin uptake from the haemolymph. Wild type ovaries transplanted into mutant females develop normally but mutant ovaries transplanted into wild type females do not develop normally. Results demonstrate the ability to take up vitellogenin from the haemolymph is attributable to developmental defects within the ovary.

Many egg chambers, some have abnormal numbers of nurse cells, many degenerate, some form eggs with abnormal chorions.

External Data
Interactions
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Phenotypic Class
Phenotype Manifest In
Additional Comments
Genetic Interactions
Statement
Reference
Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (3)
Reported As
Symbol Synonym
Name Synonyms
Secondary FlyBase IDs
    References (6)