At 22[o]C, FakN30/FakK24 larvae have enlarged neuromuscular junctions (NMJs) (increased bouton number per muscle area) compared to controls. When reared at 29[o]C, the mutant larvae show no further increase in NMJ size, in contrast to wild-type controls, which show enlarged NMJs at 29[o]C compared to at 22[o]C. The mutant larvae do not show an increase in NMJ size after 8 hours food deprivation, in contrast to controls.
The neuromuscular junction is overgrown compared to wild type in FakN30/FakK24 third instar larvae. The number of boutons per muscle area and NMJ length per muscle area are increased (by 44% and 22% respectively) compared to wild type. There is a reduction in secondary branches and an increase in higher-order branches at the muscle 6/7 NMJ compared to wild type.
The amplitude and frequency of the miniature excitatory junctional potential (mEJP) is normal at the FakN30/FakK24 neuromuscular junction. However, the mean amplitude of the evoked EJP is significantly increased compared to wild type.
FakK24/FakN30 has abnormal neuroanatomy | third instar larval stage phenotype, enhanceable by Src42AE1/Src42A[+]/Src64B[+]/Src64BPI
FakK24/FakN30 has abnormal neuroanatomy | larval stage phenotype, non-enhanceable by Adcy1rut-1
FakK24/FakN30 has abnormal neuroanatomy | larval stage phenotype, suppressible by Scer\GAL4elav.PU/Nf1UAS.CFP
FakK24/FakN30 has abnormal neuroanatomy | larval stage phenotype, non-suppressible by Adcy1rut-1
FakK24/FakN30 has neuromuscular junction | third instar larval stage phenotype, enhanceable by Src42AE1/Src42A[+]/Src64B[+]/Src64BPI
FakK24/FakN30 has NMJ bouton | larval stage | increased number phenotype, non-enhanceable by Adcy1rut-1
FakK24/FakN30 has NMJ bouton | increased number | larval stage phenotype, suppressible by Scer\GAL4elav.PU/Nf1UAS.CFP
FakK24/FakN30 has NMJ bouton | increased number | larval stage phenotype, non-suppressible by Adcy1rut-1
Expression of Nf1Scer\UAS.T:Avic\GFP-CFP under the control of Scer\GAL4elav.PU rescues the neuromuscular junction overgrowth phenotype seen in FakN30/FakK24 larvae.
The neuromuscular junction overgrowth phenotype seen in FakN30/FakK24 larvae is unaffected if the larvae are also hemizygous for rut1.
FakK24/FakN30 is rescued by Scer\GAL4elav.PU/FakUAS.Tag:HA
FakK24/FakN30 is not rescued by FakUAS.Tag:HA/Scer\GAL4Mhc.PW
The neuromuscular junction defects seen in FakN30/FakK24 larvae are rescued by expression of FakScer\UAS.T:Ivir\HA1 under the control of Scer\GAL4elav.PU, but not under the control of Scer\GAL4Mhc.PW.