Nucleotide substitution: C?T.
Amino acid replacement: Q171term.
Amino acid replacement: ??term.
C22450517T
Q171term | tilB-PA
Q171term
Site of nucleotide substitution in mutant inferred by FlyBase based on reported amino acid change.
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.
tilB1 is partially rescued by Scer\GAL4tilB.PK/tilBUAS.EGFP
tilB1 is partially rescued by tilBUAS.EGFP
tilB1 is partially rescued by tilBUAS.Tag:MYC/Scer\GAL4tilB.PK
tilB1 is partially rescued by tilBUAS.Tag:MYC
tilB1 is partially rescued by Scer\GAL4tilB.PK/tilBUASp.Venus
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.