UASt regulatory sequences drive expression of a mutant Hsap\SMAD4 cDNA carrying a missense mutation (amino acid replacement P130S) in the MH1 domain. The cDNA was originally isolated in from a colorectal tumor.
Expression of Hsap\MADH4130S.Scer\UAS under the control of Scer\GAL4A9 leads to truncated L2/L3/L4/L5 wing veins and a small margin notch.
Hsap\MADH4130S.Scer\UAS expression under the control of Scer\GAL4Dll-md23 results in 36% of the expected progeny being recovered, indicating a significant reduction in viability.