FB2024_03 , released June 25, 2024
Allele: Dmel\Btkfic-P
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General Information
Symbol
Dmel\Btkfic-P
Species
D. melanogaster
Name
fickle-P
FlyBase ID
FBal0060769
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
Btk29AficP, ficP
Key Links
Genomic Maps

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

Insertion at 2L:8277721 (release 5 genome).

Insertion of P{BmΔ-w} into a PstI-EcoRI fragment that falls within an intron of the Type 2 Btk29A splice variant. Expression of the Type 2 transcript isoform is prevented but expression of the Type 1 transcript isoform is unaffected.

Mutations Mapped to the Genome
Curation Data
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 ovaries are grossly aberrant as a result of the irregular shapes and sizes of germ cells and follicle cells. Ring canals are much smaller than wild type - their lumina are very narrow.

Btk29Afic-P mutant germaria contain significantly more germ cells than do wild-type germaria. Although supernumerary cells with spectrosomes are observed in the mutants, many of the excess cells appear to be cystocytes, as they are accompanied by a branched fusome structure.

The initial jump score of mutant flies in an olfactory jump reflex assay is normal. However, habituation of the olfactory jump reflex occurs significantly faster than normal in mutant flies. Spontaneous recovery of the olfactory jump reflex after habituation training is normal in the mutant flies. Dishabituation (after receiving a dishabituating stimulus) in mutant flies is not different from the response seen in wild-type flies. Sensitisation of the olfactory jump reflex is defective in mutant flies.

The apodemes in homozygous males typically split into two pieces at their base, in contrast to wild-type males which have a single apodeme. In some mutant males the single apodemes emerge at the base and then split proximally. Adult longevity is reduced to 11% of that of wild-type flies.

Copulation involving mutant Btk29Afic-P males often terminates shortly after initiation. Mating behavior of Btk29Afic-P females is normal. Multiple copulation attempts occur though are rare in the wild type. Two apodemes are present bilaterally at the base of the penis apparatus in all mutant males (Btk29Afic-P homozygotes and Btk29Afic-P/Btk29AL1-3), whereas wild type males have a single apodeme. Mutant males exhibit prominent atrophy of the posterior ejaculatory duct. Life span of mutant adults is reduced compared to wild-type flies.

Analysis of the non-associative learning of the jump reflex demonstrates mutants exhibit specific defects in sensitization which leads to fast habituation.

Flies exhibit a highly variable copulatory span and repetitive copulation in mated pairs often occurs soon after separation. Adult lifespan is decreased relative to wild-type.

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

Btkfic-P has short lived phenotype, suppressible by Hsap\BTKhs.PH

Suppressor of
Statement
Reference

Btkk05610/Btkfic-P is a suppressor of grandchildless phenotype of pcsgs

Btkfic-P/Btkfic-P is a suppressor of grandchildless phenotype of pcsgs

Phenotype Manifest In
Suppressed by
Statement
Reference

Btkfic-P has phallapodeme phenotype, suppressible by Hsap\BTKhs.PH

Btkfic-P has phallapodeme phenotype, suppressible by pcsgs

NOT suppressed by
Statement
Reference

Btkfic-P has phallapodeme phenotype, non-suppressible by Hsap\BTKmut.hs

Suppressor of
Statement
Reference
Additional Comments
Genetic Interactions
Statement
Reference

A significant proportion of Btk29Afic-P pcsgs double mutant males develop normal looking genitalia.

Xenogenetic Interactions
Statement
Reference

The split apodeme phenotype seen in Btk29Afic-P males is partially rescued by expression of Hsap\BTKhs.PH or Hsap\BTKE41K.hs during the third larval instar and pupal stages, but is not rescued by expression of Hsap\BTKmut.hs. The reduced longevity seen in Btk29Afic-P adult flies is slightly, but significantly, alleviated by expression of Hsap\BTKhs.PH during the third larval instar to pupal stage.

Complementation and Rescue Data
Partially rescued by

Btkfic-P is partially rescued by Btk2.hs

Btkfic-P is partially rescued by Btk1.hs

Comments
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Mutant
Wild-type
Stocks (2)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (9)
References (13)