FB2025_01 , released February 20, 2025
Allele: Dmel\Pka-C1X4
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General Information
Symbol
Dmel\Pka-C1X4
Species
D. melanogaster
Name
FlyBase ID
FBal0066002
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
DCOX4, DC0X4
Key Links
Allele class
Mutagen
    Nature of the Allele
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    Progenitor genotype
    Cytology
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    Associated Sequence Data
    DNA sequence
    Protein sequence
     
    Expression Data
    Reporter Expression
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    Marker for
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    Human Disease Associations
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    Disease-implicated variant(s)
     
    Phenotypic Data
    Phenotypic Class
    Phenotype Manifest In
    Detailed Description
    Statement
    Reference

    Pka-C1X4/Pka-C1Tw2 mutant flies show an inability to find a preferred temperature, with temperature preference spread across a wide gradient.

    Pka-C1X4/Df(2L)γ15 mutant flies show an inability to find a preferred temperature, with temperature preference spread across a wide gradient.

    Pka-C1X4/Pka-C1MB581 mutant flies show an inability to find a preferred temperature, with temperature preference spread across a wide gradient.

    The firing frequency is significantly increased in adaptive and tonic Pka-C1X4 neurons. The action potential amplitude is significantly decreased in adaptive but slightly reduced in tonic neurons in Pka-C1X4 mutant neurons. Pka-C1X4 mutant neurons display erratic firing rates during current injection.

    When Pka-C1X4 mutant neurons are simulated by step current injections, the firing pattern, in particular the number of spikes in each spike train, varied to a much greater extent than that in wild-type cells.

    As in wild-type, there is little variability in the time to peak of evoked ejcs in mutant boutons. There is a reduction in excitatory junctional current amplitude at the neuromuscular junction in mutant larvae.

    Mutants exhibit normal circadian pacemakers that can be entrained by light-dark cycles. Mutants display arrhythmic locomotor activity, rhythmic eclosion persists so eclosion occurs as in wild type.

    Pka-C1X4 hemizygotes die as third-instar larvae at 18[o]C, the restrictive temperature, but are viable when raised at 25[o]C.

    At 25[o]C, Pka-C1X4 hemizygotes exhibit reduced initial learning relative to controls but normal memory decay in a Pavlovian olfactory learning assay. Shifting the temperature from 25[O]C to 18[o]C prior to training reduces initial learning to a similar extent to Pka-C1X4 hemizygotes and controls but results in a steeper memory decay curve only in Pka-C1X4 hemizygotes.

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    Complementation and Rescue Data
    Comments

    Expression of Pka-C1Scer\UAS.cKa under the control of either Scer\GAL4Mef2.247 or Scer\GAL4c309 almost completely rescues the temperature preference behavior defects seen in Pka-C1MB581/Pka-C1X4 mutant.

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    Synonyms and Secondary IDs (5)
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      References (7)