FB2024_03 , released June 25, 2024
Allele: Dmel\fraΔC.UAS.Tag:HA
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General Information
Symbol
Dmel\fraΔC.UAS.Tag:HA
Species
D. melanogaster
Name
FlyBase ID
FBal0244568
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
P{UAS-FraΔC-HA}, UAS-FraΔC-HA
Key Links
Transgenic product class
Nature of the Allele
Transgenic product class
Progenitor genotype
Carried in construct
Cytology
Description

UAS regulatory sequences drive expression of fra lacking almost the entire cytoplasmic domain (amino acids 1109-1372), and tagged with a Tag:HA epitope.

Allele components
Component
Use(s)
Encoded product / tool
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

The expression of fraΔC.UAS.Tag:HA under the control of Scer\GAL4Pdf.PU results in adult sLNv neurons exhibiting significantly shorter axons compared to controls.

Expression of a weak transgene of fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4elav.PLu does not cause any defects in axon midline crossing.

Expression of fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360 generates midline crossing defects, with most (approx. 90%) eg-axons mis-projecting.

Neuronal expression of fraΔC.Scer\UAS.T:Ivir\HA under the control of Scer\GAL4eg-Mz360 leads to a dose dependent "commissureless" phenotype.

Overexpression of one copy of fraΔC.Scer\UAS.T:Ivir\HA under the control of Scer\GAL4elav.PLu causes commissures to become thin. Axon commissures are almost completely absent when two copies of fraΔC.Scer\UAS.T:Ivir\HA are expressed.

The severity of the embryonic commissure phenotype resulting from the overexpression of one copy of fraΔC.Scer\UAS.T:Ivir\HA under the control of Scer\GAL4elav.PLu increases in fraunspecified heterozygotes. Homozygous fraunspecified mutants overexpressing one copy of fraΔC.Scer\UAS.T:Ivir\HA exhibit a near complete loss of axon commissures.

Expression of fraΔC.Scer\UAS.T:Ivir\HA under the control of Scer\GAL4eg-Mz360 causes a decrease of EW attraction towards the midline, though in many segments the EW neurons cross normally. When fraScer\UAS.T:Myr1.T:Hsap\MYC is expressed in fraunspecified homozygous embryos, none of the EW neurons cross the midline. In some segments, EG axon guidance is also defective, a phenotype never observed in fraunspecified mutants.

External Data
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Phenotypic Class
Enhanced by
NOT Enhanced by
Suppressed by
NOT suppressed by
NOT Enhancer of
Statement
Reference
Suppressor of
NOT Suppressor of
Phenotype Manifest In
Enhanced by
Statement
Reference
NOT Enhanced by
Suppressed by
NOT suppressed by
NOT Enhancer of
Suppressor of
NOT Suppressor of
Additional Comments
Genetic Interactions
Statement
Reference

Expression of a weak transgene of fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360 has no effect on the number and severity of midline crossing defects found in Abl2 homozygous mutants. The presence of AblScer\UAS.T:Avic\GFP reduces the number of midline crossing defects (to a statistically significant level) in Abl2 homozygous mutants in a fraΔC.Scer\UAS.T:Ivir\HA1-expressing background. The presence of AblK417N.Scer\UAS.T:Avic\GFP reduces (although not to a statistically significant level) the number of midline crossing defects in Abl2 homozygous mutants in a fraΔC.Scer\UAS.T:Ivir\HA1-expressing background.

Expression of AblΔFABD.Scer\UAS.T:Avic\GFP in EW neurons, under the control of Scer\GAL4eg-Mz360 fails to rescue EW midline-crossing defects in Abl2 neurons expressing fraΔC.Scer\UAS.T:Ivir\HA1.

A Src42Ak10108 heterozygous background partially suppresses the eg-positive neuron midline crossing defects found upon expression of fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360.

A Src64Bko heterozygous background partially suppresses the eg-positive neuron midline crossing defects found upon expression of fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360.

A Src42Ak10108/+ ; Src64Bko/+ trans-heterozygous background partially suppresses the eg-positive neuron midline crossing defects found upon expression of fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360.

Src42Ak10108/+;Src64Bko heterozygous background suppresses the eg-positive neuron midline crossing defects found upon expression of fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360.

Co-expression of Src64BYF.Scer\UAS with fraΔC.Scer\UAS.T:Ivir\HA1 in eg-expressing neurons, under the control of Scer\GAL4eg-Mz360 enhances the midline crossing defects found when fraΔC.Scer\UAS.T:Ivir\HA1 alone is expressed under the control of Scer\GAL4eg-Mz360.

A unc-52 heterozygous background increases the percentage of embryonic segments displaying eg-positive axon midline crossing defects in flies expressing fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360. However, this increase isn't considered statistically significant.

A mys1/Y background increases the percentage of embryonic segments displaying eg-positive axon midline crossing defects in flies expressing fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360. However, this increase isn't considered statistically significant.

A robo1 homozygous background increases the percentage of embryonic segments displaying eg-positive axon midline crossing defects in flies expressing fraΔC.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4eg-Mz360. However, this increase isn't considered statistically significant.

The midline crossing defects of axons seen in Scer\GAL4eg-Mz360-driven fraΔC.Scer\UAS.T:Ivir\HA-expressing embryos are enhanced in a heterozygous communspecified/+ genetic background.

Expression of fraΔC.Scer\UAS.T:Ivir\HA driven by Scer\GAL4elav.PLu does not cause a commissureless phenotype in either Df(1)NP5 or Df(1)NetABΔ mutant background.

Expression of fraΔC.Scer\UAS.T:Ivir\HA driven by Scer\GAL4elav.PLu still causes a commissureless phenotype in a fraunspecified unc-5unspecified double mutant background.

Expression of fraΔC.Scer\UAS.T:Ivir\HA driven by Scer\GAL4elav.PLu in a fraunspecified sli2 double mutant background results in a phenotype similar to the phenotype observed for overexpression of fraΔC.Scer\UAS.T:Ivir\HA in a fraunspecified single mutant background, where many axons fail to cross the midline.

Expression of fraΔC.Scer\UAS.T:Ivir\HA driven by Scer\GAL4elav.PLu in a fraunspecified robo1 double mutant background dramatically repels axons, though the defect is less severe than seen in a fraunspecified single mutant background.

Expression of fraΔC.Scer\UAS.T:Ivir\HA driven by Scer\GAL4elav.PLu leads to a partial suppression of the robo1 single mutant phenotype.

Xenogenetic Interactions
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Complementation and Rescue Data
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External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (3)
Reported As
Symbol Synonym
fraΔC.Scer\UAS.T:Ivir\HA1
fraΔC.Scer\UAS.T:Ivir\HA
fraΔC.UAS.Tag:HA
Name Synonyms
Secondary FlyBase IDs
    References (10)