EIF5AL1 (eukaryotic translation initiation factor 5A like 1) is a translation elongation factor that promotes efficient translation, particularly when ribosomes stall at polyproline motifs and other challenging sequence contexts 1. The protein functions by binding between the E and P sites of the ribosome to facilitate rescue of stalled ribosomes and participates in ribosome quality control through CAT tailing mechanisms [UniProt]. EIF5AL1 exhibits tissue-specific expression patterns across human organs, with notable enrichment in brain and skeletal muscle tissues 23. Unlike its paralog EIF5A1, EIF5AL1 cannot be hypusinated but exhibits tumor-suppressor-like properties by inhibiting cell proliferation and migration 1. Clinically, EIF5AL1 dysregulation is implicated in multiple cancers: it is aberrantly expressed in colorectal cancer metastasis 4, serves as a direct target of miR-596 in breast cancer where elevated expression promotes malignancy 5, and represents a specific vulnerability in a hyperproliferative head and neck squamous cell carcinoma subtype 6. EIF5AL1 protein undergoes rapid proteasomal degradation, contributing to its differential cellular abundance compared to EIF5A1 1. These findings suggest EIF5AL1 plays distinct biological roles from other EIF5A family members and may represent a novel therapeutic target.