Expression of Csp3.Scer\UAS under the control of Scer\GAL4elav-C155 in a wild-type background has no significant effect on evoked excitatory junction potential amplitude at the neuromuscular junction in larvae. Features of spontaneous release are also normal in these larvae. Expression of Csp3.Scer\UAS under the control of Scer\GAL4elav-C155 or Scer\GAL4hs.PB results in temperature-sensitive lethality, with the animals dying during the first larval instar stage at 29oC. The lethality caused by expression of Csp3.Scer\UAS under the control of Scer\GAL4hs.PB is more severe in male than in female flies. Adult escapers carrying Csp3.Scer\UAS expressed under the control of Scer\GAL4elav-C155 have a short life span, dying within the 10 to 21 days at 25oC. The flies are extremely sluggish, show severely uncoordinated movements, and slip frequently. Body size is severely reduced and wing inflation is impaired, so that the wings appear severely crumpled. The regular ommatidial pattern is disrupted so that the eye appears rough. The eye is slightly elliptical in shape and some bristles are lost. Fusion of several ommatidial units is occasionally seen. The crumpled wing phenotype is suppressed if the flies are also homozygous for CspR1. The rough eye phenotype is partially suppressed if the flies are also carrying CspR1.
Scer\GAL4elav-C155/Csp3.UAS is a suppressor of neuromuscular junction | larval stage phenotype of Syx1Ahs.PW
The mean evoked excitatory junction potential (EJP) amplitude at the neuromuscular junction is reduced by about 34% compared to wild type in larvae expressing Syx1Ahs.PW at 25oC. The EJP amplitude is normal if the larvae are also expressing Csp3.Scer\UAS under the control of Scer\GAL4elav-C155.
Scer\GAL4elav-C155/Csp3.UAS partially rescues CspR1
Expression of Csp3.Scer\UAS under the control of Scer\GAL4elav-C155 has no effect on spontaneous miniature excitatory junction potentials at the neuromuscular junction of CspR1 third instar larvae, but does rescue the evoked excitatory junction potential at the neuromuscular junction.