FB2024_03 , released June 25, 2024
Allele: Dmel\drlP3.765
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General Information
Symbol
Dmel\drlP3.765
Species
D. melanogaster
Name
FlyBase ID
FBal0045519
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
drlP, liodrlP
Key Links
Genomic Maps

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

P{etau-lacZ} is inserted between nucleotides 449 and 450 (where the drl transcription start site is at nucleotide 487). The insertion sites of P{etau-lacZ}drlP3.765 and P{lacW}pigeonP1 are identical.

The P{etau-lacZ}drlP3.765 insertion in drlP3.765 is inserted at the same nucleotide as the P{lacW}pigeonP1 insertion.

P{lacW}pigeonP1 is inserted 6bp distal to P{etau-lacZ}drlP3.765. In both cases the element is transcribed in the opposite direction to the pigeon and drl transcription units.

P{etau-lacZ} insertion 47bp upstream from the 5' end of the longest drl cDNA.

Allele components
Component
Use(s)
Encoded product / tool
Mutations Mapped to the Genome
Associated Sequence Data
DNA sequence
Protein sequence
 
Expression Data
Reporter Expression
distribution deduced from reporter
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Information
Statement
Reference

drlP3.765 is expressed in a transient glial structure called the 'transient interhemispheric fibrous ring' (TIFR) that persists into early pupal stages but disappear by adulthood.

 
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

Adult flies show impaired olfactory memory. Retention score is similar to that of pigeonP1;drlP1 mutants.

Homozygous adults show defects in the mushroom bodies and central complex.

drlP3.765/drlR343 adults have brain defects. The fan-shaped body is distorted on its dorsal side, where axonal structures replace cell bodies. The α lobes of the mushroom bodies are reduced and the β lobes are fused or juxtaposed. The transient interhemispheric ring (TIFR) - a transient ring of cell projections at the interhemispheric junction in the middle of the brain shows defects in drlP3.765/drlR343 old larvae and young pupae.

Homozygous embryos show partial defasciculation of axons in the CNS which normally express drl.

Homozygous embryos are sluggish and uncoordinated and exhibit neuronal pathfinding defects. The drl neurons cross the midline and reach the contralateral longitudinal connective but they project anteriorly along inappropriate paths and thus fail to form the distinctive DD and DV bundles. In many segments drl neurons can be seen crossing one another and appear less organised within the anterior commissure. drlP3.765/drlR343 transheterozygotes display a similar phenotype to drlP3.765 homozygotes, yet drl neurons of transheterozygotes with drlR193 display wild type pathfinding.

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

In 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.

drlP3.765/drlP3.765; Nrt5/Nrt5 and drlP3.765/Df(2L)TW130; Nrt5/Nrt5 embryos show strong misguidance and stalling phenotypes in many hemisegments of axons that normally express drl. In addition, defects are seen in axons that do not normally express drl. Defects in Fas2 expressing axons, associated with the defects in drl expressing axons are also seen. These defects are rescued by NrtScer\UAS.cSa expressed under the control of Scer\GAL4Mz1277.

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

The P{etau-lacZ}drlP3.765 insertion in drlP3.765 is inserted at the same nucleotide as the P{lacW}pigeonP1 insertion.

Reversion of the P{etau-lacZ} insertion demonstrates this to be the cause of the neuronal phenotype.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (4)
References (12)