FB2024_03 , released June 25, 2024
Allele: Dmel\tilB1
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General Information
Symbol
Dmel\tilB1
Species
D. melanogaster
Name
FlyBase ID
FBal0050603
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Genomic Maps

Allele class
Mutagen
Nature of the Allele
Allele class
Progenitor genotype
Cytology
Description

Nucleotide substitution: C?T.

Amino acid replacement: Q171term.

Amino acid replacement: ??term.

Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
Nucleotide change:

C22450517T

Amino acid change:

Q171term | tilB-PA

Reported amino acid change:

Q171term

Comment:

Site of nucleotide substitution in mutant inferred by FlyBase 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 ( 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

Homozygous males lack the sound-evoked potential in the antennal nerve in response to a pulse song stimulus, indicating deafness.

90% of mutant files show no or only weak entrainment to temperature cycles in assays studying locomotor rhythms.

tilB1 homozygous larvae have reduced touch sensitivity compared to wild-type. Locomotion in these larvae is aberrant: compared to controls they are slower and they pause, turn and retreat more often. These defects in locomotion arise at least partially from defective peristaltic motion: stride period and % positive and negative flow are altered compared to wild-type, and the larvae spend the majority of a single peristaltic cycle in a retracted position. Despite their locomoter defects, these larvae exhibit normal phototaxic behaviour.

Mutant males demonstrate vigorous courtship including courtship songs. Relative amplitude of the sine song is higher than normal in mutant male songs.

Mutants show complete absence of sound-evoked courtship behavior. The sound evoked response (measured via the antennal nerve) is eliminated. No ultrastructural defect is evident in the Johnston's organ. In mutant alleles the spermatid axonemes are defective. Dynein arms are missing and the nexin link may be missing. Some axonemal profiles are split, as observed in elongation stage spermatids.

Larval behavioural phenotype: homozygous larvae have very low sensitivity to touch. Homozygous larval motility is wild type. Less than 10% of adults are viable and the survivors are sedentary, are unable to walk upside down or climb the sides of culture vials. Nervous system morphology is indistinguishable from wild type. At a high transepithelial potential (TEP) the mechanoreceptor potential (MRP) is wild type.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Additional Comments
Genetic Interactions
Statement
Reference
Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Fails to complement
Rescued by
Partially rescued by
Comments

tilB+t3.5 fully rescues the characteristic wild-type response to a pulse song stimulus in tilB1 homozygous males.

Expression of either tilBScer\UAS.T:Avic\GFP-EGFP or tilBScer\UAS.T:Hsap\MYC under the control of Scer\GAL4tilB.PK rescues the deafness of tilB1 males (assayed by measuring the sound-evoked response to a pulse song stimulus). tilBScer\UAS.T:Avic\GFP-EGFP and tilBScer\UAS.T:Hsap\MYC each also rescue the deafness of tilB1 males in this assay in the absence of a Scer\GAL4 driver.

Expression of either tilBScer\UAS.T:Avic\GFP-EGFP or tilBScer\UAS.T:Hsap\MYC under the control of Scer\GAL4tilB.PK does not rescue the sterility of tilB1 males.

Expression of tilBScer\UAS.T:Avic\GFP-YFP.Venus under the control of Scer\GAL4tilB.PK partially rescues the deafness of tilB1 males (assayed by measuring the sound-evoked response to a pulse song stimulus). No rescue is seen in the absence of a Scer\GAL4 driver.

Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (1)
Reported As
Name Synonyms
Secondary FlyBase IDs
    References (10)