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RPS23
RPS23 Full Name
ribosomal protein S23
RPS23 Introduction
Ribosomal protein S23 (RPS23) is a highly conserved structural component of the 40S small ribosomal subunit that plays a central role in mRNA decoding and translational fidelity. Although traditionally regarded as a housekeeping protein required for protein synthesis, growing evidence demonstrates that RPS23 has important regulatory functions beyond the ribosome, making it increasingly relevant in molecular biology, disease research, and therapeutic target discovery. One of the most distinctive features of RPS23 is its evolutionarily conserved proline residue within the decoding center, which undergoes hydroxylation by the 2-oxoglutarate-dependent oxygenase OGFOD1. This post-translational modification is essential for maintaining accurate translation and efficient protein production, particularly under cellular stress conditions. As researchers continue to investigate mechanisms that control translational accuracy, RPS23 has emerged as a valuable biomarker and functional target for studies involving ribosome quality control, hypoxia adaptation, and translational regulation.
Beyond its canonical role in translation, RPS23 has attracted considerable attention because of its unexpected non-ribosomal biological activities. Experimental studies have identified RPS23 as a novel antimicrobial protein capable of directly eliminating both Gram-positive and Gram-negative bacteria, expanding the understanding of ribosomal proteins as active participants in innate immune defense rather than passive components of the translational machinery. Together with ribosomal protein S15, RPS23 exhibits antimicrobial peptide-like properties, highlighting a previously underappreciated link between protein synthesis machinery and host immunity. In parallel, the OGFOD1-mediated hydroxylation of RPS23 has been shown to preserve translational efficiency and accuracy across multiple species, including yeast, flies, and humans. Although OGFOD1 expression may decrease under hypoxic conditions, its catalytic activity toward RPS23 remains functionally important, suggesting that this regulatory pathway contributes to adaptive protein synthesis independently of classical oxygen-sensing mechanisms. These discoveries position RPS23 at the intersection of translation control, cellular stress responses, and immune regulation.
Increasing evidence also supports the clinical relevance of RPS23 across diverse human diseases. Dysregulation of the OGFOD1–RPS23 signaling axis has been associated with altered translational landscapes and increased susceptibility to pathological cardiac hypertrophy, indicating that defects in translational fidelity may contribute to cardiovascular remodeling. In oncology, abnormal expression patterns of RPS23 and other ribosomal proteins have been reported in multiple tumor types, supporting their potential utility as diagnostic biomarkers and possible therapeutic targets for cancers characterized by dysregulated protein synthesis. Recent reviews further highlight the emerging role of RPS23 in reproductive development, where ribosomal proteins participate not only in embryonic growth and tissue differentiation but also in immune protection and developmental regulation. As research continues to reveal the diverse biological functions of RPS23, this protein is increasingly recognized as more than a structural ribosomal component—it represents a multifunctional regulator with promising applications in infectious disease research, cancer biology, cardiovascular medicine, reproductive biology, and the development of translation-targeted therapeutic strategies.
Alternate Names for RPS23
RPS23; ribosomal protein S23; 40S ribosomal protein S23; S23; homolog of yeast ribosomal protein S28; FLJ35016;
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