RPLP0

RPLP0 Full Name

ribosomal protein, large, P0

RPLP0 Introduction

Introduction to the RPLP0 Gene
The RPLP0 gene, encodes a vital component of the 60S large ribosomal subunit in eukaryotic cells. This gene is localized on chromosome 11p15.5 and plays a fundamental role in the elongation step of protein synthesis. Specifically, the RPLP0 protein forms the base of the ribosomal stalk, a dynamic structure that is essential for the recruitment of elongation factors and the coordination of GTP hydrolysis during translation. Because of its constant and high level of expression across various tissues and physiological conditions, RPLP0 is frequently utilized in molecular biology research as a reliable "housekeeping gene" for normalizing data in quantitative PCR and gene expression assays.

Figure 1. Structure of ribosomal proteins. (Söding J, 2003)

Tissue-Specific Expression and Cellular Localization
RPLP0 demonstrates a widespread but variable expression pattern across human tissues, with highest levels detected in the pancreas, esophagus, skin, and skeletal muscle, while showing lower expression in the cerebellum, testis, hypothalamus, and cerebral cortex. The protein is primarily localized in the cytoplasm, where it associates with ribosomes, but it has also been detected in the nucleus, endoplasmic reticulum, and cytoplasmic ribonucleoprotein granules containing untranslated mRNAs. Transcript variants derived from alternative splicing exist, although they encode the same protein product. The gene is located on human chromosome 12q24.23, spans approximately 4.5 kb, and contains multiple processed pseudogenes dispersed throughout the genome, a characteristic feature of ribosomal protein genes.

Molecular Interactions and Signaling Networks
RPLP0 participates in complex molecular networks that extend beyond its canonical ribosomal function. The protein interacts directly with PLAAT4 (Phospholipase A and Acyltransferase 4), a tumor suppressor, and overexpression of PLAAT4 leads to reduced RPLP0 levels and decreased cervical cancer cell survival. In non-small cell lung cancer, RPLP0 is regulated by a circRNA-mediated mechanism where circular RNA ATP9A acts as a competitive endogenous RNA, sequestering miR-582-3p away from RPLP0 mRNA, thereby derepressing RPLP0 expression and activating the PI3K/AKT signaling pathway to promote proliferation, migration, and epithelial-mesenchymal transition. RPLP0 also influences immune cell infiltration in the tumor microenvironment, affecting the composition and functional status of tumor-infiltrating lymphocytes in lung adenocarcinoma. These multifaceted interactions position RPLP0 as a potential therapeutic target, with ongoing efforts to identify pharmacological inhibitors that could suppress its oncogenic activity.

Alternate Names for RPLP0

RPLP0; ribosomal protein, large, P0; P0; LP0; L10E; RPP0; PRLP0; 60S acidic ribosomal protein P0; 60S ribosomal protein L10E; acidic ribosomal phosphoprotein P0;