Eukaryotic translation initiation factor 3 subunit L

EIF3L (eukaryotic translation initiation factor 3 subunit L) is a component of the eIF-3 complex, which plays a critical role in multiple steps of translation initiation in eukaryotes (UniProt: Q9Y262). The complex associates with the 40S ribosome to facilitate recruitment of initiation factors and mRNA scanning for AUG recognition. EIF3L specifically targets and regulates translation of mRNAs involved in cell proliferation, differentiation, and apoptosis through selective RNA stem-loop binding.

EIF3L functions broadly in protein synthesis and is not associated with specific tissues or documented disease states in UniProt. However, translation initiation dysregulation has been implicated in various pathological conditions affecting cellular homeostasis.

EIF3L is tagged as relevant to Alzheimer's Disease in this dataset. Chaparral AD proteomics analysis of post-mortem AD brain versus age-matched controls found EIF3L with an ambiguous direction of change (mean log2FC: 0.1657 across three subcellular fractions), suggesting variable expression patterns across different cellular compartments or inconsistent regulation in AD-affected tissue.