FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\mimnull
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General Information
Symbol
Dmel\mimnull
Species
D. melanogaster
Name
FlyBase ID
FBal0248904
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Cytology
Description

Deletion of exons 3-10.

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

Deletion made by modified "ends-out" homologous recombination that is reported to remove exons 3-10 (endpoints derived from primer sequences).

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

Mutant adults appear normal but display defects in locomotor activity, and mutant females show partial sterility.

Approximately 10% of the primordial germ cells arrest outside the embryo after germ band extension in mutant animals. Of those that can enter the embryo, all are capable of transmigration, but only 20% appropriately migrate towards the gonadal mesoderm. The remaining primordial germ cells are scattered throughout the posterior embryos.

Border follicle cell clusters are normal in number and size in mutant egg chambers, but are significantly delayed in the initial phase of migration compared to control clusters, such that at stage 10, nearly half of the mutant border cells are still delayed, whereas more than 90% of wild-type clusters have traversed the egg chamber to the oocyte. Analysis of migration in the mutant egg chambers shows that the directionality index of the mutant border cell clusters is reduced compared to wild-type clusters and that the speed of migration independent of direction is also reduced in the mutant border cell clusters compared to wild type.

Mutant border cells show an increased rate of uptake of the lipophilic dye FM4-64 compared to wild-type controls.

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

mimnull CortactinM7 double mutants have a wild-type border cell migration phenotype in the egg chamber.

Expression of cindrdsRNA.Scer\UAS under the control of Scer\GAL4306 in a mimnull background restores the ability of border cells in the egg chamber to migrate.

Expression of cindrdsRNA.PC.PD.Scer\UAS under the control of Scer\GAL4306 in a mimnull background restores the ability of border cells in the egg chamber to migrate.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments

Expression of mimScer\UAS.T:Hsap\MYC,T:Zzzz\His6 under the control of Scer\GAL4306 rescues the border cell migration defects seen in mimnull egg chambers.

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
mimnull
Name Synonyms
Secondary FlyBase IDs
    References (2)