Deletion in bif, removing 3kb of exon 3 and a second deletion removing most of exon 6.
photoreceptor cell R1 & axon
photoreceptor cell R2 & axon
photoreceptor cell R3 & axon
photoreceptor cell R4 & axon
photoreceptor cell R5 & axon
photoreceptor cell R6 & axon
photoreceptor cell R7 & axon
photoreceptor cell R8 & axon
The R2-R5 axons in bifR47 mutant larvae bypass the lamina, to which they are targeted in wild-type optic lobes, and terminate in the medulla. Breaks are detectable in the lamina surface of these mutants but the optic lobe shows no gross abnormalities. bifR47 mutant adult brains show largely normal arrays of axons, although the rhabdomeres of the retina have defective morphology.
Gaps are frequently seen in the R1-R6 growth cone termination site in bifR47/Y larvae, and many axons project through the lamina into the medulla layer. The R7 projection pattern is indistinguishable from that in wild type.
Homozygous eyes have bristles that are short, missing or duplicated. Fusion of adjacent ommatidia is occasionally seen. The majority of rhabdomeres are elliptical (they are round in wild-type flies) and most ommatidia show irregular patterns in the spatial organisation of the rhabdomeres. F-actin distribution in the pupal eye disc is abnormal.
bifR47 has abnormal neuroanatomy | third instar larval stage phenotype, non-enhanceable by Df(1)Δ59
bifR47 has abnormal neuroanatomy | third instar larval stage phenotype, non-suppressible by Df(1)Δ59
bif[+]/bifR47 is a suppressor of abnormal neuroanatomy phenotype of Scer\GAL4GMR.PF, msnEP549
bifR47 has medial lobe of larval mushroom body | third instar larval stage phenotype, non-enhanceable by Df(1)Δ59
bifR47 has medial lobe of larval mushroom body | third instar larval stage phenotype, non-suppressible by Df(1)Δ59
bif[+]/bifR47 is a suppressor of photoreceptor cell & axon phenotype of Scer\GAL4GMR.PF, msnEP549
Ptp10D1, bif[+]/bifR47 has embryonic/larval optic lobe phenotype
Ptp69D1, bif[+]/bifR47 has embryonic/larval optic lobe phenotype
Pp1-87B[+]/Pp1-87Bunspecified, bifR47 has photoreceptor cell R1 & axon phenotype
Pp1-87B[+]/Pp1-87Bunspecified, bifR47 has photoreceptor cell R2 & axon phenotype
Pp1-87B[+]/Pp1-87Bunspecified, bifR47 has photoreceptor cell R3 & axon phenotype
Pp1-87B[+]/Pp1-87Bunspecified, bifR47 has photoreceptor cell R4 & axon phenotype
Pp1-87B[+]/Pp1-87Bunspecified, bifR47 has photoreceptor cell R5 & axon phenotype
bifR47/+; Pp1-87Bunspecified/+ double mutant larvae show mistargeting of axons R2-R5 into the medulla and clumping of axons in the lamina. Neither single heterozygote shows this phenotype.
bifR47/+; Ptp10D1/+ and bifR47/+; Ptp69D1/+ double mutants and show clumps and breaks in the lamina, while neither single heterozygote shows this phenotype.
bifR47/homerLL17 mutants exhibit severe defects in the anchoring of osk RNA and proteins at the posterior of the developing oocyte. The F-actin cytoskeleton in these mutants are indistinguishable from wild-type. Polarity of microtubules appears normal and the cytoskeleton-dependant cytoplasmic streaming occurs normally. Treating these oocytes with an actin depolymerisation drug does not exacerbate the phenotype. When bifR47 single mutant oocytes are treated with an actin depolymerisation drug osk anchoring is defective.
The defects in photoreceptor cell projection patterns seen in larvae overexpressing msnEP549 under the control of Scer\GAL4GMR.PF are largely suppressed by one copy of bifR47.
bifR47 is rescued by Scer\GAL4GMR.PF/bifUAS.cHa
bifR47 is partially rescued by Scer\GAL4GMR.PF/bifUAS.cHa
bifR47 is not rescued by bifF995A.UAS/Scer\GAL4GMR.PF
bifR47 is not rescued by bifF995A.UAS/Scer\GAL4GMR.PF