Polytene chromosomes normal.
Amino acid replacement: R768term.
C15049991T
R768term | ck-PA; R768term | ck-PB; R768term | ck-PC; R768term | ck-PD
R768term
Site of nucleotide substitution in mutant inferred by FlyBase based on reported amino acid change.
FlyBase curator comment: "autosomal recessive nonsyndromic deafness 2" is associated with human MYO7A (the ortholog of ck).
abnormal auditory perception (with ck07130), with Scer\GAL4elav-C155, cktail.UAS.GFP
abnormal auditory perception (with ck07130), with Scer\GAL4sqh.PW, cktail.UAS.GFP
Vitelline bodies have an irregular distribution appear shorter than normal in homozygous stage 10 follicle cells. The microvilli appear shorter than normal and appear to form a denser network than in wild-type follicle cells.
Vitelline bodies form narrower columns in mid-stage 10b follicles of mutant females. The follicle cell microvilli often show irregularities in orientation. The brush border of the oocyte is highly irregular and the surface of the vitelline bodies is jagged.
The morphology of follicle cell microvilli in homozygous females is indistinguishable from that of wild type.
ck13 flies show no response to the pulse song, or to sine frequencies up to 1000 Hz, as measured via sound-evoked potentials from the antennal nerve. ck13/ck07130 transheterozygotes show a significantly reduced response to the pulse song compared to ck07130/+ controls. The Johnston's organ located at antennal segment 2 shows overall disorganization in ck13 mutants, with apical detachment of the scolopidia. The dendritic cap of the scolopidium often fails to enclose one of the cilia and may is sometimes divided into several compartments. However, scolopidial basal attachments to the a2 cuticle are not affected and a2/a3 joint epithelial cells are present, showing that detachment is not due to their degeneration. This phenotype is also observed in ck13/ck07130 transheterozygotes, although to a lesser extent. Expression of cktail.Scer\UAS.T:Avic\GFP in scolopale cells driven by Scer\GAL4sqh.PW, or in neurons driven by Scer\GAL4elav-C155, leads to a reduction in sound-evoked potentials from ck13/ck07130 flies.
ck13 flies are able to exclude markers from the cap cell-scolopale cell junction to the same extent as wild-type flies.
Nearly all homozygotes die as embryos. Mutant escapers are not fertile. Hemizygous escapers have a number of defects, including deep ridges in and aberrant projections from the shaft of the macrochaetae on the thorax. Both macrochaetae and microchaetae are stubby, branched, frequently twisted and not uniformly or smoothly tapered. Aristae are shorter and more highly branched than wild type. Wing hairs show a multiple wing hair phenotype.
Hemizygotes escape lethality with a frequency of 1%-2%. Escapers exhibit multiple trichomes on the wing. Escapers show two discrete periods of death, half as larvae and the remainder pupariate and develop into pharate adults, most die in the pupal case, only a few eclose.
Class 2 (survival at >1% <5% expected).
ck[+]/ck13 is a suppressor of visible phenotype of Scer\GAL4en-e16E, zipRod.UAS.GFP
ck[+]/ck13 is a suppressor | partially of visible phenotype of Scer\GAL4hs.PB, towUAS.cCa
ck[+]/ck13 is an enhancer of eye phenotype of Rac1GMR.PN
ck[+]/ck13 is a suppressor of wing hair | increased number phenotype of Scer\GAL4en-e16E, zipRod.UAS.GFP
ck[+]/ck13 is a suppressor | partially of wing hair | increased number phenotype of Scer\GAL4hs.PB, towUAS.cCa
ck13 is a suppressor of wing hair | increased number phenotype of dsh1
ck[+]/ck13 is a suppressor of wing hair | increased number phenotype of fzI.hs
The multiple wing hair phenotype caused by expression of zipRod.Scer\UAS.T:Avic\GFP under the control of Scer\GAL4en-e16E is suppressed by ck13/+.
The multiple wing hair phenotype caused by expression of towScer\UAS.cCa under the control of Scer\GAL4hs.PB using heat shock at 24 hours after puparium formation is partially suppressed by one copy of ck13.
The small, rough eye phenotype of Rac1GMR.PN flies is enhanced by heterozygosity for ck13.
ck13 is rescued by ckUAS.GFP/Scer\GAL4sqh.PW
ck13 is partially rescued by ckUAS.GFP/Scer\GAL4nompA.cK
ck13 is partially rescued by Scer\GAL4elav-C155/ckUAS.GFP
Expression of ckScer\UAS.T:Avic\GFP in the scolopale cells, driven by Scer\GAL4nompA.cK, or in neurons, driven by Scer\GAL4elav-C155, leads to a significant partial rescue of the ck13 auditory phenotype.
Phenotypic data included in FBrf0051973.