FB2024_03 , released June 25, 2024
Allele: Dmel\repo03702
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General Information
Symbol
Dmel\repo03702
Species
D. melanogaster
Name
FlyBase ID
FBal0009484
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
repo3702, repo3, repo2, repo-lacZ
Key Links
Genomic Maps

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

Contrary to that reported in FBrf0074834, P{PZ} is inserted between base pairs 202 and 203 of the published sequence (FBrf0074834), in the 5' UTR, in opposite orientation to the repo transcript.

P-element insertion, in the opposite direction as repo transcription, within an intron.

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

repo03702/+ mutants exhibit significantly impaired long term memory performance 24 hours after spaced training in an aversive olfactory association paradigm, as compared to controls; but do not show significantly decreased anesthesia-resistant memory performance 24 hours after massed training in an aversive olfactory association paradigm, as compared to controls.

Glial cell organisation is impaired in repo03702 mutant embryos. A higher volume of apoptotic particles is seen in repo03702 mutant CNS compared to controls, and many more of these apoptotic particles are not engulfed by phagocytes, glia or macrophages than in wild type.

The volume of glial cells in repo03702 mutant embryos is half the normal glial volume but the normal number of glial cells is formed.

repo03702 mutant embryos exhibit defects in the engulfment of apoptotic particles by glia in the CNS; the glial cells contain fewer phagosomes and apoptotic particles become overloaded within the glial cell. The macrophages in repo03702 mutants contain a greater volume of phagosomes compared to controls.

repo03702 mutant glial cell are abnormally located in the CNS and lack appropriate contacts with each other. Unlike the barely motile wild type glia, repo03702 mutant glia exhibit increased motility and are able to engulf multiple apoptotic particles.

The eve-positive U neurons derived from neuroblast NB7-1 and the four eg-positive neurons derived from neuroblast NB7-3 adopt normal positions in mutant embryos. The fasciculation of Fas2-positive motor neurons is abnormal in a small proportion of segments and the ventral nerve cord is slightly extended at stage 16.

In the periphery of homozygous repo03702 embryos, the intersegmental nerve b (ISNb) is normal, although there are rare stall phenotypes.

In stage 16 repo03702 homozygous embryos, the numbers of lateral glia are reduced and those that remain are disorganised, most peripheral glia are either missing or displaced and longitudinal glia are displaced towards the lateral edges of the ventral nerve cord.

Heterozygotes with repo1 are semi-lethal.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Enhanced by
Statement
Reference
Suppressed by
NOT suppressed by
Statement
Reference
Other
Phenotype Manifest In
Enhanced by
Statement
Reference
Suppressed by
NOT suppressed by
Statement
Reference
Other
Additional Comments
Genetic Interactions
Statement
Reference

Expression of drprI.Scer\UAS under the control of Scer\GAL4repo.PU does not rescue the glial phagocytosis defects seen in repo03702 mutant embryos; the morphology and localisation of the glia still appear abnormal, and there is an increase in apoptotic particles outside of the glial cells.

Expression of NimC4Scer\UAS.T:Avic\GFP under the control of Scer\GAL4repo.PU partially rescues the phagocytosis defects seen in repo03702 mutant embryos. The morphology and localisation of the glia still appear abnormal and the cells are overloaded with apoptotic particles. However, although the total volume of apoptotic particles in the CNS remains the same as in repo03702 mutant embryos alone, a higher proportion have been engulfed by phagocytes in the rescue embryos.

Co-expression of NimC4Scer\UAS.T:Avic\GFP and drprI.Scer\UAS under the control of Scer\GAL4repo.PU fully rescues the phagocytosis defects seen in repo03702 mutant embryos.

Tre1Δ10 ; repo03702 double mutant embryos show abnormal positioning of eve-positive U neurons derived from neuroblast NB7-1 and the four eg-positive neurons derived from neuroblast NB7-3. The fasciculation of Fas2-positive motor neurons is abnormal in a high proportion of segments.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Images (0)
Mutant
Wild-type
Stocks (1)
Notes on Origin
Discoverer

A. Spradling.

Comments
Comments

Complements: l(3)0064300643. Complements: Dlc90F04091. Complements: quag05089. Complements: sprd05284. Complements: l(3)0582205822. Complements: sr06915b. Complements: 14-3-3εj2B10. Complements: MED17s2956.

Remobilisation of the P{PZ} generates viable revertants.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (7)
References (27)