Imprecise excision of P{EP}DysGE20705 generates a 1.2kb deletion removing the Dp186 ATG codon and most of the unique first exon of Dp186.
DysDp186.166.3 mutant adults have significantly reduced benzaldehyde avoidance, compared to controls; there is no effect on axon guidance, innervation pattern or dendritic morphology of olfactory receptor neurons, compared to controls.
Voltage-clamp recordings from either the aCC or RP2 motor neurons reveals that synaptic currents are significantly increased in amplitude in DysDp186.166.3 homozygous and heterozygous mutants. Cumulative probability plots of individual synaptic currents reveals that there is a significant increase in amplitudes of the majority of the individual currents measured, compared with wild-type controls.
The frequency of action potential-dependent synaptic currents recorded in aCC/RP2 is not significantly altered in DysDp186.166.3 mutants compared to wild-type.
The presence of TTX has no effect on the ampltiude of miniature synaptic currents (mEPSCs) in aCC/RP2 neurons in DysDp186.166.3 mutants. The frequency is, however, significantly increased compared to controls, indicating a heightened probability of presynaptic vesicle release.
DysDp186.166.3 has abnormal neurophysiology phenotype, non-enhanceable by gbb1/gbb[+]
DysDp186.166.3 has abnormal neurophysiology phenotype, non-suppressible by gbb1/gbb[+]
DysDp186.166.3 is a suppressor of abnormal neurophysiology phenotype of gbb1
In a gbb1 heterozygous mutant, with only one copy of wild-type gbb, the absence of Dp186 through a DysDp186.166.3 homozygous background is sufficient to increase synaptic currents to a level comparable to that observed in DysDp186.166.3 mutants with wild-type levels of gbb expression.
Double homozygous gbb1; DysDp186.166.3 mutants display increased synaptic currents relative to gbb1 mutants.
DysDp186.166.3 is rescued by DysDp186.UAS/Scer\GAL4GH146
DysDp186.166.3 is rescued by DysDp186.UAS/Scer\GAL4SG18.1
DysDp186.166.3 is rescued by Scer\GAL4elav.PU/DysDp186.UAS
DysDp186.166.3 is rescued by Scer\GAL4eve.RN2/DysDp186.UAS
DysDp186.166.3 is not rescued by DysDp186.UAS/Scer\GAL4ChAT.7.4