FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\bamΔ59
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General Information
Symbol
Dmel\bamΔ59
Species
D. melanogaster
Name
FlyBase ID
FBal0323841
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Allele class
Nature of the Allele
Allele class
Progenitor genotype
Cytology
Description

Deletion that removes all of the bam protein except the 31 most C-terminal amino acid residues. Generated by imprecise excision of P{hsneo}bam1.

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

bamΔ59/bamΔ86 adult females are completely sterile display tumorigenic phenotype in ovaries ('bag of marbles' phenotype). The full female sterility is not improved upon Wolbachia pipientis infection.

bamBW/bamΔ59 adult females are weakly fertile with a mix of tumorous and normal egg chambers, the ovarian phenotype is significantly less severe in flies infected with Wolbachia pipientis compared to those cured of the infection and their fertility is also highly increased.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Enhanced by
Statement
Reference

bamz3-2884/bamΔ59 has female semi-sterile phenotype, enhanceable by bgcn[+]/bgcn1

bamz3-2884/bamΔ59 has neoplasia | adult stage | female phenotype, enhanceable by bgcn[+]/bgcn1

Suppressed by
Statement
Reference
Phenotype Manifest In
Enhanced by
Statement
Reference

bamz3-2884/bamΔ59 has ovary phenotype, enhanceable by bgcn[+]/bgcn1

NOT Enhanced by
Statement
Reference

Dsim\bambam.Venus, bamΔ86/bamΔ59 has ovary phenotype, non-enhanceable by bgcn[+]/bgcn1

Other
Additional Comments
Genetic Interactions
Statement
Reference

The reduced fertility of bamΔ59/bamBW females is enhanced by combination with a single copy of bgcn1 : the females are sterile with completely tumorous ovaries.

Xenogenetic Interactions
Statement
Reference

Expression of Dsim\bambam.T:Avic\GFP-YFP.Venus partially restores fertility of the otherwise sterile bamΔ59/bamΔ86 females. The ovaries of the rescue females show multiple morphological defects that accumulate with age (loss of germline stem cells, improper number of cyst divisions, mitotic synchrony defects). However, when two copies of the Dsim\bambam.T:Avic\GFP-YFP.Venus transgene are used, the fertility of the rescue females is reduced (compared to one copy rescue) and they become virtually sterile by day 15. They also show accelerated loss of the germline stem cells from the ovaries and often lack them or any germline cells altogether. These effects are alleviated even by a single copy of endogenous wild-type bam. The partial fertility of bamΔ59/bamΔ86;Dsim\bambam.T:Avic\GFP-YFP.Venus xenogenetic rescue flies is also improved by Wolbachia pipientis infection.

The ovarian defects observed in bamΔ59/bamΔ86;Dsim\bambam.T:Avic\GFP-YFP.Venus xenogenetic rescue females cannot be exacerbated by combination with a single copy of bgcn1. Additionally, combination with Dsim\bambam.T:Avic\GFP-YFP.Venus suppresses the tumorous ovary phenotype characteristic for bamBW/bamΔ59;bgcn1/+ double mutant flies.

Complementation and Rescue Data
Comments

Expression of bam4.1.T:Avic\GFP-YFP.Venus restores fertility of the otherwise sterile bamΔ59/bamΔ86 females and bamBG/bamΔ86 males, although under sperm exhaustion conditions the rescue is not complete. Ovaries of the rescue females have wild-type morphology.

The fertility of bamΔ59/bamΔ86;bam4.1.T:Avic\GFP-YFP.Venus rescue flies is neither increased nor diminished by Wolbachia pipientis infection.

Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (1)
Reported As
Name Synonyms
Secondary FlyBase IDs
    References (4)