CTBP-1 regulates exploration behavior in Caenorhabditis elegans.
CTBP-1 regulates dorsal SMD (SMDD) axonal morphology.
RAB-3 localizes to the mispositioned portion and distal tip of SMDD axons of ctbp-1 mutant animals.
The penetrance of the axonal morphology phenotype increases in adult ctbp-1 mutants.
CTBP-1 is expressed in lad-2-expressing head neurons which include the SMDD neurons.