Nucleotide substitution: C1721T.
Amino acid replacement: Q56term.
C8432396T
C1721T
Q57term | grk-PA
Q56term
some die during embryonic stage (with grkΔFRT), with grkss-mut
Eggs derived from grk2B6/grkHF females lack operculum regions II and III (the section that normally extends from the area surrounding the micropyle to the dorsal appendages and the section that is normally between the dorsal appendages), and instead only region I cells are present symmetrically surrounding the micropyle, following a symmetric collar that separates the operculum from the rest of the chorion.
Heterozygous females lay eggs with fused or partially fused dorsal appendages (98% at 18oC, 66.7% at 25oC and 34% at 29oC).
Embryos exhibit reduction or absence of dorsal appendages (ventralization) with increase in main body egg shell. Micropyle is present at both ends of eggs, embryos are ventralized.
grkHF has dorsal appendage phenotype, enhanceable by CSN5L4032/CSN5[+]
grkHF is a non-enhancer of ventral denticle belt phenotype of Krn27, spi1, vnL6
Scer\GAL4CY2, dppUAS.cSa, grk2B6/grkHF has egg chorion phenotype
Scer\GAL4CY2, dppUAS.cSa, grk2B6/grkHF has egg phenotype
Scer\GAL4CY2, dppUAS.cSa, grk2B6/grkHF has micropyle phenotype
Pvf1EP1624, grkHF, spi1 has egg chamber phenotype
vnL6 enhances the ventral patterning defects seen in spi1 mutant embryos. The double mutants have a reduced number of denticle belts compared to controls, fusion of the denticle belts and an anterior hole. The phenotype is further exacerbated by Krn27, with embryos having no denticle belts and a large anterior hole. A zygotic grkHF mutation has no additional effect.
Krn27 enhances the ventral patterning defects seen in spi1 mutant embryos. The double mutants have a reduced number of denticle belts compared to controls, fusion of the denticle belts and an anterior hole. The phenotype is further exacerbated by vnL6, with embryos having no denticle belts and a large anterior hole. A zygotic grkHF mutation has no additional effect.
Eggs derived from females expressing dppScer\UAS.cSa under the control of Scer\GAL4CY2 in a grk2B6/grkHF background have misshaped micropyles, show the loss of the collar that normally separates the operculum from the rest of the chorion and show a reduction in egg diameter.
Expression of grk::ylgrk1-275.yl1826-1984 is able to suppress the grk2B6/grkHF oogenesis phenotype.
The egg chambers of Pvf1EP1624; spi1; grkHF females do not develop normally.
grkT:Arus\HRP rescues the ventralised egg shell phenotype of eggs laid by grkHF mutant mothers.