RNA-binding protein that is involved in the post-transcriptional regulation of mRNAs (By similarity). Plays a role in the regulation of mRNA stability, alternative splicing and translation (By similarity). Binds to AU-rich element (ARE) sequences in the 3' untranslated region (3'UTR) of target mRNAs (By similarity). Mainly plays a role in neuron-specific RNA processing (By similarity). Required for the maturation of motor neuron axonal branches and dendrites (PubMed:29061699). Interacts with smn1. Expressed in motor neurons. Reduced overall movement, decreased initiation of swim and turn movements and decreased mean body curvature change per swim half-cycle and mean number of swim half-cycles per swim (PubMed:29061699). At 2 and 4 dpf, decreased axonal branches and at 4 dpf, decreased dendrites in motor neurons (PubMed:29061699). Defects on motor neuron extensions persist at 26 dph (PubMed:29061699). Decreased GAP43 mRNA levels (PubMed:29061699). Belongs to the RRM elav family. Truncated N-terminus. Truncated N-terminus.