FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\RetMEN2B.UAS
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General Information
Symbol
Dmel\RetMEN2B.UAS
Species
D. melanogaster
Name
FlyBase ID
FBal0352210
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
dRetMEN2B, RetMEN2B, UAS-RetMEN2B
Key Links
Genomic Maps

Transgenic product class
Nature of the Allele
Transgenic product class
Progenitor genotype
Carried in construct
Cytology
Description

UAS regulates expression of Ret containing an activating point mutation (M955T), orthologous to a Hsap\RET variant commonly observed in medullary thyroid carcinoma patients.

The GMR regulatory sequences in RetMEN2B.GMR have been replaced by UASt.

Allele components
Component
Use(s)
Encoded product / tool
Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
Comment:

Analogous mutation in human RET implicated in multiple endocrine neoplasia, type IIA; mutation carried on in vitro construct; site of nucleotide substitution in fly gene inferred by FlyBase curator based on reported amino acid change.

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)
 
This allele represents a human variant implicated in disease.
RET:p.Met918Thr
Variants Synonym(s)
RET:p.Met664Thr
External database links
Comments concerning this variant
Phenotypic Data
Phenotypic Class
Phenotype Manifest In
Detailed Description
Statement
Reference

Expressing RetMEN2B.UAS in the wing disc ptc domain, using Scer\GAL4ptc-559.1 as a driver, leads to an expansion of the ptc domain.

Expressing RetM955T.UAS under the control of Scer\GAL4C-765, but not Scer\GAL4ptc.PU, leads to adult wings with ectopic veins.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4Mef2.PR causes lethality at 25[o]C, but at 18[o]C viable progeny eclose with lower frequency. Surviving transgenic flies display an "actin blob" phenotype. Mild indirect flight muscle abnormalities are seen, including deposits of actin dispersed over the muscle tissues, and some abnormally thick and irregular myofibrils. Mitochondrial morphology is normal. Thoracic ATP levels are slightly reduced compared to controls.

Flies overexpressing RetMEN2B.Scer\UAS under the control of Scer\GAL4Mhc.PK (limited to the pharate adult stages onwards using Scer\GAL80ts.αTub84B) do not exhibit any indirect flight muscle phenotypes.

Expression of RetMEN2B.Scer\UAS in dopaminergic neurons under the control of Scer\GAL4ple.PF has no effect on mitochondrial morphology.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 results in mild overgrowth in the developing wing epithelium and minimal migration of cells from the ptc domain compared to controls.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 has very little effect on migration in the wing disc, with very few cells migrating away from the A-P boundary. There is very little effect on the cytoskeletal tubulin network.

Eye clones expressing RetMEN2B.Scer\UAS (generated using the ey-FLP system) have very rough eyes that retain their pigmentation.

Flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 are lethal; no adults are obtained and 50% of animals make it to the pupal stage. Notum and scuttellum phenotypes are seen in the un-eclosed pupae.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 also causes larval wing disc phenotypes including overproliferation, basal constriction and cell migration away from the ptc domain.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4C-765 leads to disruption of the overall wing pattern, including ectopic wing veins.

The lethality seen in flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 is significantly suppressed by oral administration of clinical kinase inhibitors. Vandetanib produces weak rescue, sunitinib mild rescue and sorafenib stronger rescue. Although sorafenib rescues some animals to adulthood, it does not considerably increase the proportion that develop to pupariation. The lethality associated with flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 is also suppressed by the compound AD57, with 25% of those that are rescued to adulthood fully active and fertile. However both AD57 and Sorafenib result in adults that exhibit some cuticle defects. The notum and scuttellum phenotypes seen in the un-eclosed pupae are also rescued by AD57. The wing disc overproliferation, basal constriction and migration are also rescued by AD57, as well as by sorafenib, sunitinib and vandetanib, but more weakly. AZD-6244 has no effect on viability.

The wing patterning and ectopic wing vein phenotypes seen when RetMEN2B.Scer\UAS is expressed under the control of Scer\GAL4C-765 are suppressed by the compound AD57, but Vandetanib has little effect. AD58 slightly but consistently enhances the phenotype. Combining AD58 and Sorafenib considerably suppresses invasion and migration in the wing discs, even though no effect is seen with either compound alone. AD36 results in increased invasion but this does not result in an increase in lethality. Migration is blocked upon co-treatment with AD58 and sorafenib, but not with either compound alone.

Oral administration of either AD80 or AD81 to flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 significantly suppresses the lethality, with 70-90% of animals developing to adulthood. The resulting adult flies appear phenotypically normal.

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

The surviving adults that co-express RetMEN2B.UAS and diaHM05027 under the control of Scer\GAL4ptc-559.1 have normal morphology, and with the exception of small wing vein abnormalities, the wings are indistinguishable from wild-type controls.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4Mef2.PR partially suppresses the muscle morphology phenotype seen in the indirect flight muscles of Pink1B9 mutants. The frequency of flies with "actin blobs" is also decreased markedly compared to RetMEN2B.Scer\UAS expressing controls. The fraction of severely impaired mitochondria is decreased and the fraction of mitochondria with wild type-like cristae is increased. The reduction in thoracic ATP levels is largely rescued, as is the reduction in Complex 1 activity.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4Mef2.PR does not suppress the muscle morphology phenotype seen in the indirect flight muscles of park1/park25 mutants. The frequency of flies with "actin blobs" is decreased markedly compared to RetMEN2B.Scer\UAS expressing controls. The structural impairments seen in park1/park25 mutant mitochondria are not suppressed. The reduction in thoracic ATP levels is not rescued.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4Mhc.PK (limited to the pharate adult stages onwards using Scer\GAL80ts.αTub84B) largely suppresses the muscle morphology phenotype seen in the indirect flight muscles of Pink1B9 mutants.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4Mhc.PK (limited to the pharate adult stages onwards using Scer\GAL80ts.αTub84B) does not suppress the muscle morphology phenotype seen in the indirect flight muscles of park1/park25 mutants.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4ple.PF suppresses the mitochondrial morphology defects seen in Pink1B9 mutant dopaminergic neurons.

Expression of RetMEN2B.Scer\UAS under the control of Scer\GAL4ple.PF does not suppress the mitochondrial morphology defects seen in park1/park25 mutant dopaminergic neurons.

Expression of RetMEN2B.Scer\UAS does not suppress the reduction in Complex I activity seen when CG11455GD4800 is expressed under the control of Scer\GAL4Mef2.PR.

Expression of Sin3AKK100700 enhances the wing disc phenotypes seen when RetMEN2B.Scer\UAS is expressed under the control of Scer\GAL4ptc-559.1. Large numbers of cells are shifted basally below the epithelium and migrate significant distances from the ptc domain.

Co-expression of RetMEN2B.Scer\UAS and Nek2Scer\UAS.T:Avic\GFP under the control of Scer\GAL4ptc-559.1 results in a large number of cells migrating away from the A-P boundary into the adjacent compartment. Extensive rearrangement of the cytoskeletal tubulin network is also seen.

Expression of Nek2Scer\UAS.T:Avic\GFP enhances the rough eye phenotype seen in eye clones expressing RetMEN2B.Scer\UAS, emergence of unpigmented, undifferentiated cells in the adult eye and the presence of clonal cells in tissues adjacent to the eye, including the proboscis.

Expression of RetMEN2B.Scer\UAS enhances the "distant seeding" phenotype seen when Nek2Scer\UAS.T:Avic\GFP is expressed under the control of Scer\GAL4GMR.PF. Larger groups of Avic\GFP-positive cells are detected in distant body parts. This phenotype is significantly reduced when flies also carry one copy each of Pi3K21Bunspecified and S6kunspecified. The phenotype can also be suppressed by drugs that inhibit signalling along the PI3K cascade; LY294002, Rapamycin, MK2206 or BEZ235.

One copy of rl1 suppresses the enhanced lethality seen when flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 are treated with AD58.

One copy of rl1 further suppresses the rescuing effect of AD57 on the lethality of flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1.

One copy of rl1 has no effect on the viability of flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 treated with AZD-6244.

One copy of Torunspecified suppresses the rescuing effect of AD57 on the lethality of flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1, resulting in an increased frequency of lethality than in the absence of the drug.

One copy of Torunspecified further enhances the increased lethality seen when flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 are fed AD58.

One copy of S6kunspecified suppresses the lethality seen when flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 are fed AD58.

One copy of rl1 suppresses the wing pattern and ectopic wing vein phenotypes seen when RetMEN2B.Scer\UAS is expressed under the control of Scer\GAL4C-765.

One copy of rl1 further suppresses the enhanced wing pattern and ectopic wing vein phenotypes seen when flies expressing RetMEN2B.Scer\UAS is expressed under the control of Scer\GAL4C-765 are treated with AD58.

One copy of rl1 suppresses the rescuing effect of AD57 on the wing pattern and ectopic wing vein phenotypes seen when RetMEN2B.Scer\UAS under the control of Scer\GAL4C-765.

AD58 enhances the wing phenotypes seen in flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4C-765 in a Torunspecified/+ background.

One copy of rl1 has no effect on the rescuing effect of AD80 or AD81 on the lethality of flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1.

One copy of Torunspecified increases proliferation in the larval wing discs of flies expressing RetMEN2B.Scer\UAS under the control of Scer\GAL4ptc-559.1 that have been fed AD58.

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 (3)
Reported As
Symbol Synonym
RetM955T.UAS
RetMEN2B.Scer\UAS
RetMEN2B.UAS
Name Synonyms
Secondary FlyBase IDs
  • FBal0291680
  • FBal0346153
References (8)