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Six mutants of SLO-1, a large-conductance, Ca2+-activated K+ channel of C. elegans, were obtained in a genetic screen for regulators of neurotransmitter release. Mutants were isolated by their ability to suppress lethargy of an unc-64 syntaxin mutant that restricts neurotransmitter release. We measured evoked postsynaptic currents at the neuromuscular junction in both wild-type and mutants and observed...
C. elegans aex-3mutations cause pleiotropic behavioral defects that are suggestive of reduced synaptic transmission. aex-3mutations also show strong genetic interactions with mutations in unc-31and unc-64, two other genes implicated in synaptic transmission. Physiological and pharmacological studies indicate that aex-3defects are presynaptic. In aex-3mutants, the synaptic vesicle–associated RAB-3...