Functions to regulate alternative splicing in neurons by binding pre-mRNA in a sequence-specific manner to activate exon inclusion (By similarity). Plays a role in long-term memory formation by processing the unspliced Orb2-isoform A (Orb2A) mRNA and thereby controlling Orb2A protein abundance (PubMed:28525754). Localizes to synaptoneuropil region of neurons. Expressed in the central nervous system in mushroom body neurons (at protein level). Expressed in the salivary gland, anterior and posterior midgut primordia, the fully formed midgut, amnioserosa, malpighian tubules, several regions of the head, and in isolated cells along the germ band, which are likely to be hemocytes. The KH domain consists of approximately 70 amino acids and includes a conserved hydrophobic core, an invariant Gly-X-X-Gly motif, and an additional variable segment. The third KH domain (KH3) binds a hairpin RNA loop containing the 5'-UCAY-3' motif on targeted molecules. RNA binding by KH3 requires residues C-terminal to the KH domain. In both embryo and larva, results in irregularly shaped salivary glands with bulges of variable sizes, leading to greater distances between neighboring nuclei and decreased apical secretion.