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General Information
Symbol
Dmel\hbUAS.cWa
Species
D. melanogaster
Name
Saccharomyces cerevisiae UAS construct a of Wimmer
FlyBase ID
FBal0104606
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
UAS-hb, UAS-hbF4A
Key Links
Allele class
Nature of the Allele
Allele class
Mutations Mapped to the Genome
 
Type
Location
Additional Notes
References
Associated Sequence Data
DNA sequence
Protein sequence
 
 
Progenitor genotype
Carried in construct
Cytology
Nature of the lesion
Statement
Reference

UASt regulatory sequences are fused upstream of a 2.4kb fragment containing the hb open reading frame.

Allele components
Product class / Tool use(s)
Encoded product / tool
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

Expressing hbUAS.cWa under the control of the Split GAL4 pair Scer\GAL4DBD.gsb and Hsim\VP16AD.ac in combination with Scer\GAL4KZip+.R25A05 (the dominant-negative repressor of activity in the Split GAL4 system KZip+ expressed in the pattern of GMR25A05) induces changes in the morphology of late-born motor neurons developing from neuroblast NB7-1. Late-born motor neurons adopt a morphology similar to endogenous U1 neurons, producing a dorsal contralateral dendritic arbor which targets the same region of the neuropil as controls and an axon which exclusively innervates dorsal oblique body wall muscles DO1 and DO2. In hbUAS.cWa-expressing larvae, a significantly increased number of presynaptic brp-immunopositive puncta form on DO2 (but not DO1) at the expense of the lateral longitudinal muscle LL1 compared to controls. Unlike endogenous U1 neurons, in late-born hbUAS.cWa-expressing U motor neurons the dendritic arbor emerges from a dorsal location and not from the cell body. hbUAS.cWa overexpression leads to the generation of supernumerary U motor neurons with a shifted temporal identity, progressively adopting a typical 'late-born' morphology.

U motor neurons in stage 13-15 embryos expressing hbUAS.cWa under the control of the Split GAL4 pair Scer\GAL4DBD.gsb and Hsim\VP16AD.ac in combination with Scer\GAL4KZip+.R25A05 display a sequential arbor extension and a gross arbor distribution similar to wild-type controls: early-born neurons project axons and dendrites before later-born neurons and have longer axon and dendritic projections. hbUAS.cWa overexpression has no effect on the morphology of the endogenous U1 or U2 neurons.

Expression of hbScer\UAS.cWa under the control of Scer\GAL4en-e16E in embryos induces the U1/U2 fate, resulting in 20.3 +/- 5.1% of NB7-1 neuroblast lineages having more than five hb+ U1/U2 neurons in these animals.

Overexpression of hbScer\UAS.cWa in the developing eye under the control of Scer\GAL4GMR.PF generates a rough eye phenotype.

Expression of hbScer\UAS.cWa under the control of Scer\GAL4elav-C155 results in a significant increase in the number of SE2 neurons specified.

In wild-type, neuroblast NB7-1 generates five U motoneurons. Overexpression of hbScer\UAS.cWa in hb15/hbP1only mutant NB7-1 under the control of Scer\GAL4en-e16E produces an average of twelve U neurons per hemisegment.

Overexpression of hbScer\UAS.cWa in NB7-1 under the control of Scer\GAL4en-e16E produces an average of seventeen U neurons per hemisegment.

Overexpression of hbScer\UAS.cWa in embryos under the control of Scer\GAL4pros.PMG generates an average of nine U neurons per hemisegment.

In hbScer\UAS.cWa ; Scer\GAL4sca-109-68 embryos motor neurons U2-U5 are born and differentiate much later than normal (first detected during stage 16 rather than during stage 13 as in wild-type). Their cell bodies are also mis-positioned.

Expression of two copies of hbScer\UAS.cWa under the control of Scer\GAL4pros.PMG at 23oC in the NB7-1 lineage just after the birth of the hb-negative GMC3 has no effect on the normal U1-U3 fates, but subsequently the neuroblast generates an average of 6.3 extra U1 motor neurons (based on molecular marker expression). Expression of one copy of hbScer\UAS.cWa under the control of Scer\GAL4pros.PMG at 18oC in the NB7-1 lineage just after the birth of the hb-negative GMC3 results in the production of ectopic presumptive U2 neurons. Expression of two copies of hbScer\UAS.cWa under the control of Scer\GAL4en-e16E results in a massive induction of U1 neurons. U neuron identity remains wild type in embryos expressing hbScer\UAS.cWa under the control of eve2xCQ.RC.T:Scer\GAL4.

When hbScer\UAS.cWa is driven by Scer\GAL4eg-Mz360 mostly five to eight NB7-3 derived clls in abdominal segments compared to four in wild-type). However all of these neurons express markers of the early sublineage, while those of the late sublineage are missing. When hbScer\UAS.cWa is driven by Scer\GAL4sca.PC or Scer\GAL4en-e16E, an increase in eve positive neurons are seen in the CQ position, these are probably additional fpCCs and/or dorsal CQ neurons.

When hbScer\UAS.cWa is driven by Scer\GAL4en-e16E, there are additional neurons in the EW1 neuron lineage indicating a duplication of the GMC1 fate. There also duplication of the first born aCC/pCC or duplications or triplications of RP2. Extra MM-CB glia are seen at the midline and there is a decrease in the number of midline channel glia.

Embryos expressing hbScer\UAS.cWa under the control of Scer\GAL4nos.bcd3'UTR.T:Scer\GCN4 (where Scer\GAL4nos.bcd3'UTR.T:Scer\GCN4 is provided maternally) show 80% embryonic lethality. The few surviving larvae never reach adulthood. 30% of the embryos show a strong head phenotype that mimics the tor loss-of-function phenotype; the median tooth and epistomal sclerite are absent, and the pharyngeal arms of the mouth skeleton, including the dorsal bridge, the dorsal arm and ventral arm are extremely reduced. The oesophagus is not apparent. 16% of embryos have a less severe phenotype, showing mostly truncations of a part of the dorsal bridge, distortions of the pharyngeal wall and defects of the labrum derivatives, which are either absent, truncated or displaced. Most remaining embryos (52%) have head involution defects that might be secondary. The fkh- and Kr-expressing cells of the stomatogastric nervous system precursor invaginations are missing. All surviving larvae derived from embryos expressing hbScer\UAS.cWa under the control of Scer\GAL4nos.bcd3'UTR.T:Scer\GCN4 (where Scer\GAL4nos.bcd3'UTR.T:Scer\GCN4 is provided maternally) have feeding problems, since food never reaches the midgut. Food accumulates in the pharynx and oesophagus, which is drastically shortened. The gastric caeca are slightly altered and food never reaches the proventriculus, which has an abnormal morphology.

Expression of hbScer\UAS.cWa driven by Scer\GAL412.1 (in sensory organ precursor cells in positions close to bridge cells) leads to the dorsal trunk of the embryo showing interruptions and abnormal bottleneck-like fusion points.

External Data
Interactions
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Phenotypic Class
Enhanced by
Statement
Reference
Suppressed by
Phenotype Manifest In
Additional Comments
Genetic Interactions
Statement
Reference

The percentage of NB7-1 neuroblast lineages containing more than hb+ U1/U2 neurons is increased from 20.3 +/- 5.1% in animals expressing hbScer\UAS.cWa under the control of Scer\GAL4en-e16E to 50.3 +/- 3.6% in animals co-expressing LamTRiP.cUa and hbScer\UAS.cWa under the control of Scer\GAL4en-e16E.

Co-expression of danScer\UAS.cEa in embryos expressing hbScer\UAS.cWa under the control of Scer\GAL4en-e16E increases the median number of U1/U2 neurons per NB7-1 neuroblast lineage from approximately five to approximately eight.

Simultaneous overexpression of hbScer\UAS.cWa and fruNP0021 in the developing eye under the control of Scer\GAL4GMR.PF disrupts the developing eye structure to a greater extent than expression of each transgene alone.

Co-expression of hbScer\UAS.cWa and casScer\UAS.cKa in neuroblast NB7-1 under the control of Scer\GAL4en-e16E produces an average of fifteen U neurons per hemisegment.

Co-expression of hbScer\UAS.cWa and pdm2Scer\UAS.T:Ivir\HA1 in neuroblast NB7-1 under the control of Scer\GAL4en-e16E produces an average of nine U neurons per hemisegment.

The embryonic lethality seen in embryos expressing hbScer\UAS.cWa under the control of Scer\GAL4nos.bcd3'UTR.T:Scer\GCN4 (where Scer\GAL4nos.bcd3'UTR.T:Scer\GCN4 is provided maternally) is increased if they are derived from females carrying one copy of bcd6.

Embryos derived from homozygous bcd6 mothers carrying four copies of Scer\GAL4nos.bcd3'UTR.T:Scer\GCN4 and fathers carrying hbScer\UAS.cWa homozygously show suppression of anterior tail structures and thoracic structures are rescued to variable extent, up to a complete rescue of T2 and T3.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
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Mutant
Wild-type
Stocks (2)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (3)
Reported As
Symbol Synonym
hbScer\UAS.cWa
hbUAS.cWa
Name Synonyms
Saccharomyces cerevisiae UAS construct a of Wimmer
Secondary FlyBase IDs
    References (17)