FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\TER94E375Q.E575Q.UAS
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General Information
Symbol
Dmel\TER94E375Q.E575Q.UAS
Species
D. melanogaster
Name
FlyBase ID
FBal0282575
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
UAS-VCP QQ
Key Links
Nature of the Allele
Progenitor genotype
Carried in construct
Cytology
Description

UAS regulatory sequences drive expression of an ATPase-deficient TER94 transgene (E375Q, E575Q) that acts as a dominant-negative.

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 ( 1 )
Modifiers Based on Experimental Evidence ( 1 )
Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
 
Disease-implicated variant(s)
 
Phenotypic Data
Phenotypic Class
Phenotype Manifest In
Detailed Description
Statement
Reference

Expression of TER94E375Q.E575Q.Scer\UAS under the control of Scer\GAL4ppk.PG leads to strong dendrite pruning defects with approx. 80% of class IV dendrite arborizing neurons still having dendrites attached to the cell body at 18h after puparium formation.

Expression of TER94E375Q.E575Q.Scer\UAS in class IV neurons (ddaC) under the control of Scer\GAL4ppk.PG causes a reduction in dendrite arborization, while major branches stay intact. These defects in class IV neurons mostly affect higher-order branches containing filamentous actin, but not primary dendrite branches rich in microtubules.

Expression of TER94E375Q.E575Q.Scer\UAS in class III neurons (ddaA and ddaF) under the control of Scer\GAL419-12 affects the length of class III dendrites, although spike appearance is normal. An additional copy of TER94E375Q.E575Q.Scer\UAS increases the severity of the phenotype, with approximately 64% of all neurons displaying strong defects.

A high proportion of class IV neurons (ddaC) expressing TER94E375Q.E575Q.Scer\UAS under the control of Scer\GAL4ppk.PG retain long, attached dendrites (with 63% not severed).

Addition of 100υM RU486 to Scer\GAL4ppk.Switch.PR/TER94E375Q.E575Q.Scer\UAS larvae 24 hours before the onset of metamorphosis does not visibly change the morphology of the larval neurons; however, a high proportion of class IV neurons (ddaC) in these drug-treated animals retina their dendrites at 18 hours after pupal formation (defects occur in approximately 70% of neurons). indicating that the phenotypes observed during metamorphosis can be disassociated from the defects at the larval stage.

Class III neurons overexpressing TER94E375Q.E575Q.Scer\UAS under the control of Scer\GAL419-12 do not undergo apoptosis and are still present by 18 hours after puparium formation. In these flies, the ddaF neuron is more prone to survive than ddaA.

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

The dendrite pruning defects in class IV dendrite arborizing neurons observed in pupae expressing TER94E375Q.E575Q.Scer\UAS under the control of Scer\GAL4ppk.PG is not significantly affected by co-expression of Mfap1GD5122 or by combination with a single copy of Mfap1DsRed.

A th4 heterozygous mutant background suppresses the class IV pruning defects seen upon expression of TER94E375Q.E575Q.Scer\UAS under the control of Scer\GAL4ppk.PG. Lowering th levels also sensitises cells to stress-induced apoptosis, and a high proportion of TER94E375Q.E575Q.Scer\UAS-expressing neurons in a th4 heterozygous background undergo apoptosis during early metamorphosis (approximately 60% at 15 hours after pupal formation).

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (2)
Reported As
Symbol Synonym
TER94E375Q.E575Q.Scer\UAS
TER94E375Q.E575Q.UAS
Name Synonyms
Secondary FlyBase IDs
    References (5)