Imprecise excision of the P{EP} element.
lethal (with Df(2L)bur-K1)
uncoordinated | adult stage (with Dap160Δ1)
bouton | increased number (with Dap160Δ1)
Neuromuscular junction (NMJ) morphology is abnormal in Dap160Δ1/Dap160Δ3 third instar larvae; boutons are irregularly spaced and large boutons are surrounded by smaller satellite boutons. Extra branches and boutons are apparent in the mutant larvae. In 5mM Ca2+ at 22oC, the amplitude of the excitatory junctional potential (EJP) at the neuromuscular junction (NMJ) in Dap160Δ1/Dap160Δ3 third instar larvae is not different from that of controls. The EJP amplitude at the NMJ of Dap160Δ1/Dap160Δ3 third instar larvae is normal in 5mM Ca2+ at 36oC. In 0.5mM Ca2+, the frequency of miniature EJPs (mEJPs) at the NMJ is increased more than 2 fold in Dap160Δ1/Dap160Δ3 larvae compared to controls at 22oC. mEJPs with an unusually large amplitude are seen at both 22oC and 36oC. Dap160Δ1/Dap160Δ3 larvae show a mild defect in endocytosis at 22oC (assayed by dye uptake in third instar fillet preparations), which is exacerbated at 36oC. Dap160Δ1/Dap160Δ3 larvae show a stimulation-dependent decrease in EJP amplitude when stimulated at 10Hz. This decrease is more severe at 36oC than at 22oC.
Dap160Δ1/Dap160Δ3 is rescued by Dap160UAS.cKa/Scer\GAL4αTub84B.PL
Dap160Δ1/Dap160Δ3 is rescued by Scer\GAL4elav-C155/Dap160UAS.cKa
Induced with: l(2)05287Δ3.
Allelic series (based on protein expression data, complementation data and lethal phase): Dap160Δ1 = Dap160Δ2 > Dap160Δ3 = Dap160Δ4 = Dap160Δ5 > Dap160EMS > Dap160Δ6.