FB2024_03 , released June 25, 2024
Allele: Dmel\rtP
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General Information
Symbol
Dmel\rtP
Species
D. melanogaster
Name
FlyBase ID
FBal0014813
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Allele class
Nature of the Allele
Allele class
Progenitor genotype
Associated Insertion(s)
Cytology
Description

P{hsneo} is inserted into the first exon of rt.

P-element insertion within the rt locus.

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 )
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

Recordings from larval neuromuscular junctions (muscle 6 of A3 or 4) of rtP/Df(3L)ED4470 animals show a dramatic decrease in evoked synaptic transmission. However, the size and frequency of spontaneous mini excitatory junction potentials is normal. Based on this, estimated quantal content is reduced about 3 fold. This phenotype is unaffected by the suppression of action potentials with 1 micro-molar TTX. Short term facilitation is enhanced in these mutants, suggesting that decreased quantal content is due to decreased probability of vesicle release in response to stimulus.

Muscle attachment defects are observed in rt2/rtP mutant third instar larvae. Sarcomeres are larger than in control animals.

rtP, rtP/rtEP571 and rtP/rt2 flies have rotated abdomens.

The bodies of first instar larvae are rotated around the long axis, forcing the animals to move in a clockwise circle as they crawl. The larval cuticle presents a perfect segmental alignment of landmarks but the adult abdominal cuticle segments appear staggered relative to each other.

Homozygous males and females have reduced fertility and show abdominal rotation.

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

rtP/rtEP571 has adult abdomen phenotype, non-enhanceable by Dp(1;Y)y2sc/+

Suppressed by
Statement
Reference

rtP has adult abdomen phenotype, suppressible by tw[+]/tw1

rtP/rtEP571 has adult abdomen phenotype, suppressible by tw[+]/tw1

Other
Additional Comments
Genetic Interactions
Statement
Reference

Evoked excitatory junction potentials are normal at the neuromuscular junctions of rtP/+ or Dge01554/+ larvae, but siginficantly reduced compared to wild-type in rtP/+; Dge01554/+ larvae. However, the size and frequency of spontaneous mini excitatory junction potentials is normal in transheterozygotes.

Dg323/+;rtP/+ third instar larvae show muscle attachment defects and large sarcomeres.

A greater number of muscle attachment defects are observed in tw1; rt2/rtP mutant third instar larvae compared to rt2/rtP mutants. Sarcomeres are larger than in wildtype animals.

The rotated abdomen phenotype of rtP/rtEP571 flies is not enhanced by the presence of the Dp(1;Y)y2sc duplication. Likewise, expression of the twScer\UAS.T:Ivir\HA1 transgene, under the control of Scer\GAL4Act5C.PI, does not enhance the abdominal phenotype of rtP/rt2 mutants. This phenotype is also not affected by tw RNAi, achieved by expression of twdsRNA.Scer\UAS under the control of Scer\GAL4Act5C.PI. However, expression of twdsRNA.Scer\UAS, driven by Scer\GAL4Act5C.PI or Scer\GAL4αTub84B.PL, reduces the rotated abdomen phenotype of rtP/+ flies.

At 18oC, flies expressing Pomt2dsRNA.Scer\UAS under the control of Scer\GAL4Act5C.PHb in a rtP/+ background show a clear twisted abdomen phenotype, in contrast to either single mutant (rtP/+ or flies expressing Pomt2dsRNA.Scer\UAS under the control of Scer\GAL4Act5C.PHb at 18oC in a wild-type background).

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Partially rescued by
Comments

Evoked excitatory junction potentials are normal at the neuromuscular junctions of rtP/+ or Dge01554/+ larvae, but significantly reduced compared to wild-type in rtP/+; Dge01554/+ larvae. However, the size and frequency of spontaneous mini excitatory junction potentials is normal in transheterozygotes.

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Mutant
Wild-type
Stocks (1)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (6)
References (14)