embryonic ganglionic branch & embryonic tracheole (with cora4)
Homozygous cora5 mutants and corak08713/cora5 transheterozygotes show electrophysiologically detectable loss of glutamate receptors.
The septate junctions of cora5 mutant stage 15 embryos are disrupted.
The tracheal systems of lates stage cora5 homozygous embryos have overgrown tubes with unusual expansions, defects in the accumulation of lumen antigens and lumen breaks.
In cora5 homozygous mutants the adherens junction remains intact, with the regular spacing of plasma membranes maintained. However, the septae normally located between these membranes are reduced in number or absent. cora5/cora5 somatic clones generated in larvae (approx. 72 hours after egg laying) do not survive in adult tissues.
In cora5/cora4 embryos, tracheal phenotypes are apparent from stage 15. At stage 16 in these embryos the average dorsal trunk length is significantly greater than wild type (P<0.005) (122+/-2% mean+/-s.e.m., n>5, normalized to stage 16 wild-type value). In addition these embryos have moderately severe diameter increases in the dorsal trunk and other primary tracheal branches, and some ganglionic branches exhibit missing lumen. Diameter increases are also seen in the primary tracheal branches of cora5 homozygous embryos. Unlike wild-type, post stage 15 trachea in cora5 homozygotes are unable to exclude from their lumens, a fluorescently labelled 10kDa dextran injected into the body cavity. This is consistent with these trachea lacking a functioning septate junction barrier.
Homozygous embryos have a dorsal open phenotype, cuticular thinning, necrosis of the salivary glands and a tracheal inflation defect. Embryos lack the individual septae that normally characterise the pleated septate junction. The salivary gland epithelium shows permeability to rhodamine-dextran, in contrast to wild type.
Homozygous embryos have a faint cuticle and a dorsal hole. The remains of the salivary glands are present as necrotic material. The epicuticle fails to adhere to the procuticle. The pleated septae that normally characterise the pleated septate junction are absent in mutant epithelia, and the transepithelial barrier function of the septate junction is also disrupted. The adherens junction appears unaffected in mutant embryos. No adult escapers are produced. Hemizygous embryos have a dorsal hole and detached cuticle. The denticle belts contain fewer denticles than normal, although the overall pattern of the denticle belts is normal.
Homozygous embryos have dorsal closure defects; dorsal holes are seen in the cuticle. Necrosis is seen in the salivary glands.
cora5 has presumptive embryonic/larval tracheal system phenotype, non-enhanceable by nrv2nwu3/nrv2nwu3
cora5 has presumptive embryonic/larval tracheal system phenotype, non-suppressible by nrv2nwu3/nrv2nwu3
cora5/cora5 is a non-enhancer of presumptive embryonic/larval tracheal system phenotype of nrv2nwu3
cora5/cora5 is a non-suppressor of presumptive embryonic/larval tracheal system phenotype of nrv2nwu3
Dominantly suppresses the rough eye phenotype of EgfrE1/+ heterozygotes; the eye is smaller than wild type with some roughening.
cora5 is rescued by cora3.Ubi-p63E
cora5 is rescued by corafl.hs.Tag:MYC
cora5 is rescued by cora2.Ubi-p63E
cora5 is rescued by cora1.Ubi-p63E
cora5 is rescued by cora1.Ubi-p63E
cora5 is partially rescued by cora1-383.hs.Tag:MYC
cora5 is not rescued by cora378-1698.hs.Tag:MYC
cora5 is not rescued by cora1-1698.UAS.Tag:MYC/Scer\GAL4T80
cora5 is not rescued by cora1-383.UAS.Tag:MYC/Scer\GAL4T80