Amino acid replacement: T40I.
Nucleotide substitution: C?T.
C19870386T
C?T
T40I | Rab8-PA; T40I | Rab8-PC
T40I
All the tested trans-heterozygous allelic combinations of Rab83 mutants display synaptic overgrowth, characterized by significant increase in synaptic bouton number of up to 100% relative to wild-type.