Amino acid replacement: M522K.
Met at residue 522 (in the tyrosine kinase domain) replaced by Lys.
T7706865A
T?A
M522K | tor-PA; M517K | tor-PD
M522K
Suppresses "splice" phenotype of torNRE, presumably because product is appropriately positioned to block diffusion of the tor ligand, even though it cannot transduce the terminal signal.
Does not interact with RpII140wimp maternal effect.
Embryos carrying the hbΔ transcripts do not express kni and form no abdominal segments.
A hole is seen in the blastoderm layer below the pole cells in embryos. The ventral furrow is extended posteriorly. Segments A8 to the telson are deleted. Segments A5 to A7 are expanded. Some twisting of the germband is seen. Labral and acron-derived structures are deleted. There is cell death in the head and tail region. Cephalic furrow and anterior midgut invagination are shifted anteriorly.
The anteriormost and posteriormost structures are lacking and the anterior pattern is shifted anteriorly. tor embryos display normal levels of bcd protein.
Embryos derived from homozygous females lack the most anterior and posterior structures; the head skeleton is smaller than normal and the Filzkorper, anal plate and spiracles are missing.
Homozygous females produce embryos which have deletions of the most anterior head structures (labrum and chitinous mouth plates), and the most posterior abdominal structures (posterior midgut, telson and abdominal segment A8).
recessive
Wieschaus, Nusslein-Volhard.
Germline mosaic analysis shows that tor is required in the germline.
Transplantation of wild-type anterior cytoplasm into the anterior end of embryos derived from homozygous tor1 females can rescue the mutant anterior structures. Transplantation of wild-type posterior cytoplasm into the posterior end of embryos derived from homozygous tor1 females can rescue the mutant posterior structures. Cytoplasm transplanted from tor4 mutant donors has no rescuing effect.