FB2026_02 , released June 18, 2026
Allele: Dmel\Pcyt199
Open Close
General Information
Symbol
Dmel\Pcyt199
Species
D. melanogaster
Name
FlyBase ID
FBal0156789
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Allele class
Nature of the Allele
Allele class
Progenitor genotype
Caused by aberration
Cytology
Description

Imprecise excision has created a deletion. The entire Cct1 promoter region has been deleted.

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

Ovaries from Cct199 mutants contain ovarioles with only one or two egg chambers (rather than the normal six or seven). Mutant germaria sometimes contain few or no germline cells with spectrosomes, indicating a loss of germline stem cells. Mutant females produce egg chambers with mispositioned oocytes and packaging defects. In these ovaries, packaging defects occur with variable frequency and include egg chambers with fewer than 16 germline cysts as well as egg chambers that contain multiple germline cysts. The mis-positioning of the oocyte is seen more consistently - the oocyte is found in the middle or the anterior of the egg chamber. This can be already be seen in the germarium, suggesting a defect in the early positioning of the oocyte. In ovaries from females homozygous for Cct199, ovarioles exhibit a "branched ovariole" phenotype, in which multiple ovarioles are attached to one egg chamber. This phenotype is often seen in ovaries in which some of the ovarioles are separated from each other as in wild-type. Mutant ovaries also contain ovarioles that are curled up within the ovariolar sheath rather than stretched out as in wild-type ovaries. These phenotypes seem to be caused by defects in ovarian morphogenesis. At 20-22.5 hours APF in wild-type, the ovarioles are clearly separated into distinct structures, and basal stalks have started to form. In mutants the apical cells do not appear to have migrated through the cluster of basal cells as expected and basal stalks have not yet started to form. At 39-40 hours APF ovaries from mutant pupae have started to form stalks that are shorter and thicker than wild-type, some of which show incomplete separation.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
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 (2)
Reported As
Symbol Synonym
Cct199
Pcyt199
Name Synonyms
Secondary FlyBase IDs
    References (1)