Amino acid replacement: E467K.
Missense mutation in conserved part of lumenal domain.
G1052568A
G25248A
E467K | S-PA; E467K | S-PB
E467K
SB0453 mutant embryos show cardioblast (CB) patterning defects, and a severely decreased number of cardioblasts, namely of generic cardioblasts, leading to a lower generic CBs:ostial CBs ratio than the typical 4:2 ratio. These embryos also exhibit a significant decrease in the number of odd pericardial cells, although even pericardial cells are unaffected, as compared to controls.
SB0453 has abnormal cell number | embryonic stage phenotype, enhanceable by Ecol\lacZsvp-AE127
SB0453 has decreased cell number | embryonic stage phenotype, suppressible | partially by Scer\GAL4how-24B/BacA\p35UAS.cHa
SB0453 has embryonic cardioblast phenotype, enhanceable by Ecol\lacZsvp-AE127
SB0453 has heart primordium phenotype, enhanceable by Ecol\lacZsvp-AE127
SB0453 has embryonic cardioblast phenotype, suppressible | partially by Scer\GAL4how-24B/BacA\p35UAS.cHa
SB0453 has heart primordium phenotype, suppressible | partially by Scer\GAL4how-24B/BacA\p35UAS.cHa
The overall decrease in the number of cardioblasts in SB0453 mutant embryos is not affected by Ecol\lacZsvp-AE127; however, ostial cardioblasts become absent while generic cardioblasts increase in number.
The decreased numbers of cardioblasts (namely generic cardioblasts) in SB0453 mutant embryos are partially suppressed by the additional expression of BacA\p35UAS.cHa under the control of Scer\GAL4how-24B.