FB2025_01 , released February 20, 2025
Allele: Dmel\trioS137203
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General Information
Symbol
Dmel\trioS137203
Species
D. melanogaster
Name
FlyBase ID
FBal0117281
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Genomic Maps

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

P{lacW} in the first exon of the trio transcript, in the untranslated region. P{lacW}trioS137203 and P{lacW}trioS138606 map within 5bp of each other.

Allele components
Component
Use(s)
Inserted element
Encoded product / tool
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

Homozygous trioS137203 third instar larvae show a reduction in the number of boutons per muscle surface area (MSA). The number of boutons per MSA at muscle 4 is approximately 35% less than in controls.

trioS137203/Df(3L)Ar12-1 third instar larvae show a reduction in the number of boutons per muscle surface area (MSA). The number of boutons per MSA at muscle 4 is approximately 35% less than in controls.

trioS137203/trio6A third instar larvae show a reduction in the number of boutons per muscle surface area (MSA). The number of boutons per MSA at muscle 4 is approximately 35% less than in controls. The sizes of evoked excitatory junctional potentials (EJPs), miniature excitatory junctional potentials and the quantal content do not differ significantly from controls.

In heterozygous mutants, an occasional loss of the RP3 neuron is seen.

Adult escapers have a wing posture phenotype. Mutants show a short stop phenotype, with defects in the ability of nerve branches to reach target muscles. ISNb (where the effect is most pronounced) and SNa are most sensitive to the loss of trio activity. In addition, there are occasional defects in epidermal muscle attachment sites. The CNS also shows pathfinding errors resulting in breaks in the longitudinal connectives. The axons often fail to traverse the segment boundary.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Enhancer of
Statement
Reference
NOT Enhancer of
Suppressor of
NOT Suppressor of
Additional Comments
Genetic Interactions
Statement
Reference

One copy of trioS137203 partially suppresses the larval neuromuscular junction overgrowth and bouton number phenotypes seen when Rac1Scer\UAS.cLa is expressed in neurons under the control of Scer\GAL4OK6. Bouton number is reduced by more than 50%.

Homozygous trioS137203 suppresses the larval neuromuscular junction overgrowth and increase in bouton number seen when Rac1Scer\UAS.cLa is expressed in neurons under the control of Scer\GAL4OK6.

trioS137203/trio6A suppresses the increase in evoked excitatory junctional potential (EJPs) and quantal content seen when Rac1Scer\UAS.cLa is expressed in neurons under the control of Scer\GAL4OK6.

trioS137203 does not enhance the reduction in bouton number phenotype seen in Madk00237 larval neuromuscular junctions.

trioS137203/trio6A does not suppress the larval neuromuscular junction overgrowth and increase in bouton number seen when Rac1V12.Scer\UAS is expressed in motor neurons under the control of Scer\GAL4BG380.

trioS137203/trio6A suppresses the increase in evoked excitatory junctional potential (EJPs) and quantal content seen when saxA.Scer\UAS.cBa and tkvQ199D.Scer\UAS.T:Ivir\HA1 are expressed in motor neurons under the control of Scer\GAL4BG380.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Partially rescued by
Not rescued by
Comments

Expression of trioScer\UAS.cBa in neurons under the control of Scer\GAL4OK6 rescues the reduction in synaptic bouton phenotype seen in trioS137203/trio6A third instar larvae. Expression of trioScer\UAS.cBa in muscles using Scer\GAL4G14 is unable to rescue the phenotype.

Expression of trioScer\UAS.cBa only in the larval stages using the neuronal driver Scer\GAL4elav.Switch.PO rescues the reduction in synaptic bouton phenotype seen in trioS137203/trio6A third instar larvae.

Images (0)
Mutant
Wild-type
Stocks (1)
Notes on Origin
Discoverer
Comments
Comments

Excision of the P{lacW} restores viability and reverts the wing phenotype.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (4)
Reported As
Name Synonyms
Secondary FlyBase IDs
    References (8)