FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\cas3921
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General Information
Symbol
Dmel\cas3921
Species
D. melanogaster
Name
FlyBase ID
FBal0123929
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
cas-Gal4, castor-GAL4
Key Links
Nature of the Allele
Progenitor genotype
Associated Insertion(s)
Cytology
Description
Allele components
Component
Use(s)
Inserted element
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

Homozygotes do not have any visible defects in the adult brain. cas290/cas3921 escapers reveal mushroom bodies that lack β and β' lobes.

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

cas3921 is an enhancer of adult brain phenotype of drlP1

cas3921 is an enhancer of ellipsoid body phenotype of drlP1

cas3921 is an enhancer of mushroom body phenotype of drlP1

cas3921 is an enhancer of adult brain phenotype of drlP3.765

cas3921 is an enhancer of ellipsoid body phenotype of drlP3.765

cas3921 is an enhancer of mushroom body phenotype of drlP3.765

Other
Statement
Reference
Additional Comments
Genetic Interactions
Statement
Reference

In drlP1, cas3921 and drlP3.765, cas3921 double mutants, fibres abnormally cross the midline above a flattened fan-shaped body in 55% of flies, the mushroom bodies β and β' lobes are fully fused in 33% of flies and the ellipsoid body is ventrally cleaved. In nobKS49/cas3921 flies, unlike the single mutants, individuals exhibit fibres abnormally crossing the midline above the fan shaped body.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Fails to complement
Comments
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (1)
Reported As
Symbol Synonym
cas3921
Name Synonyms
Secondary FlyBase IDs
    References (1)