FB2024_03 , released June 25, 2024
Allele: Dmel\CycE01672
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General Information
Symbol
Dmel\CycE01672
Species
D. melanogaster
Name
FlyBase ID
FBal0059171
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
cycE1672
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Associated Insertion(s)
Cytology
Description

The P{PZ} insertion maps to the first intron of the CycE type II maternal transcript.

Allele components
Component
Use(s)
Inserted element
Encoded product / tool
Mutations Mapped to the Genome
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

In females homozygous for CycE01672, 37+/-7% of egg chambers (n>200) contain a cell adjacent to the true oocyte with abnormally low ploidy and other oocyte-like features, and only 14 wild-type nurse cells; i.e.- one of the nurse cells is partially transformed into a second oocyte.

Mutant ovaries show an increase in heterochromatic DNA replication but no perturbations in nurse chromosome structures.

CycEJP/CycE01672 flies have essentially wild-type eyes.

Two or three of the cystocytes differentiate as oocytes.

Nurse cell chromocenters are increased dramatically in both size and intensity. The "5-blob" nuclear stage persists in some affected nurse cells beyond endocycles 4-5, indicating retarded chromatin changes. 30% of egg chambers contained 8 instead of 16 cells: 7 nurse cells and an oocyte. 30-40% of egg chambers contain germline cysts with two germinal vesicles and 5% contain 3. Those with two germinal vesicles always include 14 nurse cells, indicating a nurse cell to oocyte transformation. The extra germinal vesicle is smaller and has a retarded development. Eggs develop one or two extra dorsal appendages, indicating that the extra germinal vesicles can provide the usual dorsalising activity. Mutant nurse cells have increased DNA content, due to the increased propagation of the (usually under-represented) heterochromatic sequences. Late replication is restored to endomitotic nurse cells (where it does not normally occur), but not to follicle cells.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Suppressed by
Statement
Reference

CycE01672 has nurse cell phenotype, suppressible by dap[+]/dap4

Additional Comments
Genetic Interactions
Statement
Reference

Heterozygosity for dap4 partially suppresses the 2 oocyte phenotype of CycE01672 homozygous females (37+/-7% to 14+/-7%).

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
Comments
Comments

Excision of the P{PZ} restores female fertility and reverts the nurse cell chromocenter phenotype.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (9)
References (19)