Based on limited published evidence, RRP36 is a nucleolar protein essential for early pre-rRNA processing and ribosomal small subunit (40S) biogenesis. RRP36 functions within 90S preribosomal particles to facilitate early cleavages of 35S pre-rRNA, leading to mature 18S rRNA production 1. This function is evolutionarily conserved across eukaryotes. RRP36 recruitment depends on UTP-A and UTP-B subcomplexes but not on U3 snoRNP incorporation 1. Additionally, RRP36 has been identified as a hub gene in ribosome biogenesis pathways potentially linking metabolic disease to cancer mechanisms 2.