A Database of Drosophila Genes & Genomes

FB2013_03, released May 7th, 2013
 

Allele Dmel\Tip60E431Q.Scer\UAS

General Information
SymbolDmel\Tip60E431Q.Scer\UASSpeciesD. melanogaster
NameFlyBase IDFBal0268425
Feature typealleleAssociated geneDmel\Tip60
Allele class
Mutagenin vitro construct - regulatory fusionin vitro construct - amino acid replacementin vitro construct - site directed mutagenesis
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Description
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FB2013_03
FB2013_02
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Allele class
Mutagen
Mutations Mapped to the Genome
Type
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Associated Sequence Data
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Protein sequence
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Progenitor genotype
Nature of the lesion
Statement
Reference
Scer\UAS regulatory sequences drive expression of a full-length Tip60 ORF sequence with a mutation in the MYST domain.
Amino acid replacement: E431Q.
Scer\UAS regulatory sequences drive expression of Tip60 coding sequences containing an amino acid mutation.
Carried in construct
Cytology
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Statement
Reference
Expression of Tip60[E431Q.Scer\UAS] at 25[o]C from late embryonic development to adulthood, under the control of Scer\GAL4[337Y] is lethal. The developmental stage when lethality occurs varies between individual fly lines, with the majority of lethality occurring during the late pupal stage for line A, and during the late second instar larvae stages for lines B and C. Similar results are seen upon expression with Scer\GAL4[Act5C.PI]. Endogenous levels of acetylated histone His4 are significantly depleted in in Scer\GAL4[337Y]-->Tip60[E431Q.Scer\UAS] flies. Expression of Tip60[E431Q.Scer\UAS] in the nervous system, under the control of Scer\GAL4[elav.PLu] (pan-neuronally), Scer\GAL4[179Y] (pan-neuronally) or Scer\GAL4[60IIA] (specifically in the brain and CNS), causes a reduction in viability. This viability varies between 0-25% for expression under the control of Scer\GAL4[elav.PLu] (depending on the transgenic line), 30% for Scer\GAL4[179Y], and 40% for Scer\GAL4[60IIA], respectively.
Pre-synaptic expression of Tip60[E431Q.Scer\UAS] under the control of Scer\GAL4[elav-C155] results in pupal lethality. There is a significant increase in the total number of synaptic boutons in Tip60[E431Q.Scer\UAS]-expressing larvae, when compared to wild-type controls. There is a substantially larger expansion of type-I boutons compared to type-Ib in these mutants. There is also a slight increase in the number of satellite boutons in these mutants compared to controls. This increase in bouton number is accompanied by an excess of futsch-associated microtubule looping and splaying. Neuromuscular junctions in these larvae exhibit a reduction in acetylated microtubule staining, compared to wild-type. Post-synaptic expression of Tip60[E431Q.Scer\UAS] under the control of Scer\GAL4[Mef2.247] results in pupal lethality. Mutant larvae exhibit a significant reduction in bouton number, specifically in 1s boutons, as well as the absence of satellite boutons.
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Rescued by
Comments
Co-expression of Tip60[Scer\UAS.cLa] rescues the lethality associated with the expression of Tip60[E431Q.Scer\UAS], when both transgenes are under the control of Scer\GAL4[337Y].
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Reported As
Symbol Synonym
Tip60E431Q.Scer\UAS
 
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hide References ( 2 )
Research paper
Lorbeck et al., 2011, PLoS ONE 6(4): e18412
Microarray analysis uncovers a role for tip60 in nervous system function and general metabolism. [FBrf0213446]
Sarthi and Elefant, 2011, PLoS ONE 6(10): e26202
dTip60 HAT Activity Controls Synaptic Bouton Expansion at the Drosophila Neuromuscular Junction. [FBrf0216592]