RPL14

RPL14 Full Name

ribosomal protein L14

RPL14 Introduction

Ribosomal protein L14 (RPL14) is a highly conserved structural component of the eukaryotic 60S large ribosomal subunit and is indispensable for accurate ribosome assembly and protein translation. Although traditionally regarded as a housekeeping protein, growing evidence demonstrates that RPL14 has important regulatory functions beyond ribosome biogenesis. For researchers investigating cancer biology, developmental disorders, or translational regulation, understanding RPL14 has become increasingly relevant because alterations in ribosomal proteins can reshape cellular stress responses, proliferation, and genome stability. Recent studies have shown that ribosomal proteins, including RPL14, participate in extra-ribosomal signaling pathways that influence cell-cycle progression, apoptosis, and nucleolar stress responses through both p53-dependent and p53-independent mechanisms. These findings position RPL14 as more than a structural ribosomal component, highlighting its emerging value as a biomarker candidate and a potential therapeutic target in diseases driven by dysregulated protein synthesis and ribosome function.

Beyond its canonical role in translation, RPL14 contributes to diverse biological processes that influence cell fate and tissue homeostasis. Experimental evidence suggests that RPL14 regulates cellular proliferation, differentiation, and developmental programming by interacting with key regulatory proteins involved in transcriptional control and protein stability. In mouse embryonic stem cells, RPL14 has been reported to cooperate with MDM2 to maintain the transcriptional landscape associated with the two-cell-stage developmental program, indicating a previously unrecognized role in stem cell identity and early embryogenesis. These observations expand the biological significance of RPL14 from a ribosomal structural protein to a modulator of gene expression networks and cellular plasticity. Such discoveries also support the broader concept that ribosomal proteins can selectively influence translation and signaling pathways, providing new opportunities to investigate how ribosome-associated factors coordinate development, stress adaptation, and cellular reprogramming under physiological and pathological conditions.

Increasing clinical evidence links abnormal RPL14 expression or function with multiple human diseases, particularly cancer. In nasopharyngeal carcinoma, RPL14 overexpression has been shown to suppress tumor cell proliferation, migration, invasion, and epithelial-mesenchymal transition (EMT), supporting a tumor-suppressive role and suggesting that reduced RPL14 activity may contribute to malignant progression. More broadly, dysfunction of ribosomal proteins has been associated with ribosomopathies, genomic instability, and increased susceptibility to hematological and solid malignancies through impaired ribosome biogenesis and altered stress signaling. It is important to distinguish RPL14 from mitochondrial ribosomal protein L14 (MRPL14), a distinct protein encoded by a different gene. Unlike cytoplasmic RPL14, MRPL14 has been reported to promote thyroid cancer progression by regulating oxidative phosphorylation, reactive oxygen species (ROS) homeostasis, and EMT-related pathways, illustrating how different ribosomal protein family members can exert opposing biological effects depending on their cellular localization. As research continues to uncover the molecular mechanisms linking ribosome biology with disease, RPL14 is expected to gain greater importance in translational medicine, serving as a promising target for mechanistic studies, biomarker discovery, and the development of precision therapeutic strategies.

Alternate Names for RPL14

RPL14; ribosomal protein L14; 60S ribosomal protein L14; CAG ISL 7; CTG B33; hRL14; L14; RL14; CTG-B33; CAG-ISL-7; MGC88594;

• 1.Kang J, et al.; Ribosomal proteins and human diseases: molecular mechanisms and targeted therapy. Signal Transduct Target Ther. 2021, 6(1):323.
  2.Zhang Z, et al.; Human/eukaryotic ribosomal protein L14 (RPL14/eL14) overexpression represses proliferation, migration, invasion and EMT process in nasopharyngeal carcinoma. Bioengineered. 2021, 12(1):2175-2186.