MRPL14 (mitochondrial ribosomal protein L14) is a structural component of the mitochondrial large ribosomal subunit (mt-LSU) that plays a critical role in mitochondrial translation. MRPL14 forms part of two intersubunit bridges in the assembled ribosome and, upon binding to the regulatory protein MALSU1, blocks intersubunit bridge formation to prevent ribosome assembly and repress translation [UniProt]. The protein is essential for mitochondrial ribosome biogenesis; depletion of MRPL14 results in decreased monosome formation, mitochondrial translation defects affecting most mitochondrial polypeptides, and severe oxidative phosphorylation (OXPHOS) complex assembly defects 1. MRPL14 associates with C7orf30, a conserved DUF143 family protein required for proper mt-LSU assembly 1. Clinically, MRPL14 dysregulation is associated with multiple disease states. Genome-wide and epigenome-wide association studies have linked MRPL14 variants to asthma pathogenesis 2. MRPL14 is upregulated in hepatocellular carcinoma and shows diagnostic and prognostic value for HCC patient stratification 3. Conversely, MRPL14 is downregulated in aortic aneurysm tissues, with genetic evidence supporting a causal protective role against aortic aneurysm development 4. MRPL14 has also been associated with diabetic retinopathy susceptibility 5 and represents a mitochondrial dysfunction marker in thyroid tumorigenesis 6. These findings suggest MRPL14 as a potential biomarker for multiple conditions involving mitochondrial dysfunction.