UASt regulates expression of amino acids 1-657, corresponding to Lasp-PB, bearing a Y86S substitution in the actin-binding SDxxYK motif in nebulin repeat 1, and tagged at the N-terminus with Tag:FLAG and Tag:polyHis.
LaspY86S.L.UAS.Tag:FLAG,Tag:polyHis/Scer\GAL4Mef2.PR partially rescues Lasp1
Scer\GAL4Mef2.PR-mediated expression of LaspY86S.L.Scer\UAS.T:Zzzz\FLAG,T:Zzzz\His6 rescues the sarcomere length, thin filament length and flight phenotypes, but not the myofibril diameter phenotype seen in Lasp1 mutants. EM analyses reveal that filament spacing, but not filament number, is partially rescued.