UTP6 is a nucleolar protein that functions as a component of the small subunit (SSU) processome, the initial precursor complex in eukaryotic ribosomal small subunit assembly 1. During SSU processome assembly in the nucleolus, UTP6 participates in coordinated ribosome biogenesis by facilitating pre-18S rRNA processing, including RNA folding, chemical modifications, structural rearrangements, and targeted cleavage events 2. The protein associates with nascent pre-rRNA, ribosomal proteins, and RNA chaperones to coordinate these maturation processes. UTP6 amplification on chromosome 17 is associated with enhanced ribosome biogenesis in collecting duct carcinoma, contributing to aggressive tumor proliferation and metastasis 1. Beyond cancer, UTP6 mislocalization—rather than differential expression—correlates with breast cancer development, suggesting aberrant protein compartmentalization affects its normal ribosome biogenesis function 3. Additionally, UTP6 was identified as a hub gene dysregulated in sepsis pathogenesis, where it participates in immune cell activation and differentiation with diagnostic potential (AUC >0.95) 4. UTP6 haploinsufficiency within NF1 microdeletions on 17q11.2 may contribute to developmental abnormalities observed in NF1 microdeletion syndrome 5, suggesting its involvement extends beyond ribosome biogenesis to broader developmental processes.