RNA-binding protein; 5'UTR binding protein that forms amyloid-like translation-repressing aggregates in meiosis, induced by starvation conditions; involved in regulation of early and middle sporulation genes; contains three RNA recognition motifs (RRM1-3) and a C-terminal intrinsically-disordered region containing a prion-like domain involved in the conversion of the monomeric form into amyloid-like aggregates; PKA signaling inhibits Rim4p assembly and promotes assembly clearance via the IDR