A Hsp83 promoter drives expression of full length jar into which the leucine zipper dimerization sequence from the Saccharomyces cerevisiae GCN4 gene has been inserted, at the end of the coiled-coil domain (between amino acids 1018 and 1019). This is designed to force protein dimer formation. The protein is also tagged with GFP.
jarGCN4.Hsp83.GFP partially rescues jar1/Df(3R)crb87-5
Expression of jarHsp83.T:Avic\GFP,T:Scer\GCN4 partially rescues the actin cone morphology and movement defects seen in jar1/Df(3R)crb87-5.
Expression of jarHsp83.T:Avic\GFP,T:Scer\GCN4 partially rescues the sperm individualisation defects seen in jar1/Df(3R)crb87-5. Many sperm tails fail to individualise and in those that have, many have not completed cytoplasmic exclusion.
Expression of jarHsp83.T:Avic\GFP,T:Scer\GCN4 partially rescues the fertility defects seen in jar1/Df(3R)crb87-5 mutants.
Expression of jarHsp83.T:Avic\GFP,T:Scer\GCN4 partially rescues the empty seminal vesicle phenotype seen in jar1/Df(3R)crb87-5, although many seminal vesicles containing very few sperm are still present.