RPS5 encodes a ribosomal protein S5 that is a structural component of the cytosolic small ribosomal subunit (40S) and plays essential roles in protein synthesis and ribosome biogenesis 1. The protein participates in the assembly of the small subunit processome, where it works with other ribosome biogenesis factors to facilitate proper RNA folding, modifications, and cleavage of pre-ribosomal RNA 2. RPS5 is crucial for efficient translation initiation, with its N-terminal domain communicating with ribosomal protein S16 to modulate the association of initiator tRNA with the ribosomal P site 3. Beyond its canonical ribosomal functions, RPS5 has significant disease relevance. In hepatocellular carcinoma, RPS5 acts as a tumor suppressor where its degradation by FBXO22-mediated ubiquitination activates the PI3K/AKT/HIF-1α/VEGF-A signaling pathway, promoting angiogenesis and metastasis 4. RPS5 also confers resistance to MEK inhibitor-induced cell death in cancer cells, and aspirin can sensitize cells to MEK inhibition by directly binding to RPS5 5. In cardiovascular disease, differential methylation and expression of RPS5 is associated with mosaic loss of Y chromosome 19 increased cardiovascular mortality 6. Additionally, RPS5 promotes stem cell differentiation and migration when interacting with KDM4D 7.