Stage 16 MbsN300.Scer\UAS embryos under the control of the Scer\GAL4how-24B driver show laterality defects in the proventriculus and anterior midgut. The laterality of the other parts of the embryonic gut, including the hindgut and the posterior part of the midgut is normal in these mutants. The proventriculus and the anterior midgut do not rotate (as in wild-type) in these mutants at stages 15 to 17.
Stage 16 MbsN300.Scer\UAS embryos under the control of either Scer\GAL4NP5021 or Scer\GAL4NP221 do not show any loss of rotation in the proventriculus and anterior midgut.
Expression of MbsN300.Scer\UAS in larval epidermal cells, under the control of Scer\GAL4NP0056, results in a significant proportion of these cells failing to extrude and remaining within the abdominal epidermis at postmetamorphosis periods. This results in cuticular clefts in the adult abdomen.
Expression of MbsN300.Scer\UAS, under the control of Scer\GAL4da.G32, causes lethality at or before the pupal stage. When its expression is driven in the eye disc by Scer\GAL4ey.PH or Scer\GAL4GMR.PF, there are no apparent defects in eye receptor differentiation.
MbsN300.UAS, Scer\GAL4da.G32 has lethal | pupal stage phenotype, suppressible by RokCAT.UAS, Scer\GAL4da.G32
Scer\GAL80ts.αTub84B, MbsN300.UAS, Scer\GAL4ap-md544 is a suppressor of abnormal cell shape | conditional | third instar larval stage phenotype of BacA\p35UAS.cHa, DadUAS.cTa, Scer\GAL4ap-md544, Scer\GAL80ts.αTub84B
MbsN300.UAS, Scer\GAL4da.G32 is a suppressor of lethal | pupal stage phenotype of RokCAT.UAS, Scer\GAL4da.G32
MbsN300.UAS/Scer\GAL4GMR.PU is an enhancer of retina phenotype of eys1, prom[+]/prom1
Scer\GAL80ts.αTub84B, MbsN300.UAS, Scer\GAL4ap-md544 is a suppressor of wing disc | conditional | third instar larval stage phenotype of BacA\p35UAS.cHa, DadUAS.cTa, Scer\GAL4ap-md544, Scer\GAL80ts.αTub84B
Expression of MbsN300.Scer\UAS under the control of Scer\GAL4GMR.PU enhances the rhabdomere fusion seen in eys1 prom1 double heterozygotes.
Overexpression of both rokCAT.Scer\UAS and MbsN300.Scer\UAS, under the control of Scer\GAL4da.G32, allow ~30% of flies to survive to adulthood, instead of dying as pupae.
Co-expression of MbsN300.Scer\UAS and BacA\p35Scer\UAS.cHa in the dorsal compartment of the wing disc (under the temperature-regulated control of Scer\GAL4ap-md544 by Scer\GAL80ts.αTub84B) does not alter apical-basal cell length in mutant cells compared with control cells.
The shorter cell length observed in wing disc tissue expressing DadScer\UAS.cTa and BacA\p35Scer\UAS.cHa (under the temperature-regulated control of Scer\GAL4ap-md544 by Scer\GAL80ts.αTub84B), is rescued by co-expression of MbsN300.Scer\UAS.
Encodes a constitutively activated form of Mbs.