Imprecise excision of the P{PZ} element. A 1.1kb fragment from the 3' end of the element is left behind (inserted in reverse orientation) at nucleotide 13 and nucleotides 6-13 are duplicated.
wekEX14/Df(2L)BSC690 pupae display reduced levels of cell death (number of Dcp-1-positive cells) in the ventral nerve cord relative to controls but the number of eve-positive neurons is unaffected.
Embryos
derived from mothers homozygous mutant for wekEX14 in the germline develop dorsalized cuticular structures with a range of phenotypes. 51% of these embryos show an extreme dorsalized phenotype as they secrete a hollow tube of dorsal epidermis, while the other 49% lack ventral and lateral structures but retain the dorsolaterally derived filzkorper.
Although weklor/wekEX14 transheterozygotes are pupal lethal, some survive to adulthood but have crooked legs.
Embryos derived from weklor/wekEX14 mothers exhibit a dorsalized phenotype that is weaker than embryos derived from wekEX14 mothers, but stronger than embryos derived from weklor mothers.
wekEX14/Df(2R)BSC279 is a suppressor of increased cell death | pupal stage phenotype of Scer\GAL4elav.PU, Toll-6C1020Y.UAS.Tag:FLAG
wekEX14/Df(2L)BSC690 is a non-suppressor of increased cell death | pupal stage phenotype of SarmEP3610, Scer\GAL4elav.PU
wekEX14 has embryonic ventral epidermis | non-rescuable maternal effect | germline clone phenotype, enhanceable by Tl[+]/Tlr4
wekEX14 has embryonic/first instar larval cuticle | ventral | non-rescuable maternal effect | germline clone phenotype, enhanceable by Tl[+]/Tlr4
wekEX14 has embryonic ventral epidermis | non-rescuable maternal effect | germline clone phenotype, enhanceable by pll7/pll[+]
wekEX14 has embryonic/first instar larval cuticle | ventral | non-rescuable maternal effect | germline clone phenotype, enhanceable by pll7/pll[+]
wekEX14 has embryonic ventral epidermis | non-rescuable maternal effect | germline clone phenotype, enhanceable by tub[+]/tub2
wekEX14 has embryonic/first instar larval cuticle | ventral | non-rescuable maternal effect | germline clone phenotype, enhanceable by tub[+]/tub2
wekEX14/Df(2R)BSC279 is a suppressor of larval ventral nerve cord | pupal stage phenotype of Scer\GAL4elav.PU, Toll-6C1020Y.UAS.Tag:FLAG
wekEX14/Df(2L)BSC690 is a non-suppressor of larval ventral nerve cord | pupal stage phenotype of SarmEP3610, Scer\GAL4elav.PU
Tl3, wekEX14/weklor has embryonic/first instar larval cuticle | lateral phenotype
The increased cell death (number of apoptotic Dcp-1-positive cells) in the ventral nerve cord of pupae expressing Toll-6C1020Y.Scer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4elav.PU can be rescued by combination with wekEX14/Df(2R)BSC279. In contrast, the increase in Dcp-1-positive cells in pupal VNC induced by Scer\GAL4elav.PU-driven expression of Ect4EP3610 cannot be suppressed by loss of combination with wekEX14/Df(2L)BSC690).
The variable dorsalized embryonic phenotype of wekEX14 mutants is enhanced by mutations in the genes Tl, pll and tub. While 51% of wekEX14 embryos show an extreme dorsalized phenotype, this penetrance is increased to 97% in wekEX14; Tlr4/+ embryos, 92% in wekEX14; pll7/+ embryos and 96% in wekEX14; tub2/+ embryos.
Embryos produced by weklor/wekEX14; Tl3/+ mothers show a biphasic phenotype distribution. 76% show a moderately dorsalized phenotype; these embryos lack ventral and lateral structures but retain the dorsolaterally-derived filzkorper. 24% show a lateralized phenotype; these embryos are elongated and thin in appearance and contain fine rings of laterally-derived ventral denticle belts.
wekEX14/Df(2L)BSC690 is rescued by Scer\GAL4elav.PU/wekUAS.ORF.GW.Tag:HA
The reduced level of cell death (decreased number of Dcp-1-positive cells) observed in the ventral nerve cord (VNC) of wekEX14/Df(2L)BSC690 and the increase in cell death induced by Scer\GAL4elav.PU-driven expression of wekScer\UAS.ORF.GW.T:Ivir\HA1 can both be mitigated by combining the two manipulations together: The number of apoptotic cells in the VNC of wekEX14/Df(2L)BSC690 mutants expressing wekScer\UAS.ORF.GW.T:Ivir\HA1 is intermediate to each of the two perturbations and higher than in controls.
Based on the extent of the dorsalized phenotype in embryos from germ-line clones, the following wek alleles can be ranked from strongest to weakest as follows: wekEX14 > wekRAR14 > weklor.