Amino acid replacement: I307N.
dorsal cluster neuron & neurite, with Scer\GAL4ato.3.6
eye, with Scer\GAL4hs.2sev
Phenotype similar to but less severe than that in loss of function mutants. Only occasionally do fibers cross from the lobula to the medulla, but those that do form aberrant projection and branching patterns within the medulla. Effect is the same whether in a wild type or a Fmr1Δ113M/Fmr1Δ83M background.
Expression of Fmr1I307N.Scer\UAS in the eye driven by Scer\GAL4hs.2sev produces a mild eye phenotype. Overexpression also leads to the alteration of rhabdomere shape.