Host ribosomal translational machinery (80S ribosome)

The host ribosomal translational machinery is the multi-component system responsible for the synthesis of proteins within a cell, primarily centered around the eukaryotic 80S ribosome. This complex includes the 40S and 60S subunits, ribosomal RNA (rRNA), and a suite of auxiliary proteins known as initiation, elongation, and termination factors [1]. In the context of disease, many viruses lack their own translational apparatus and must hijack the host's machinery to replicate, making it a target for broad-spectrum host-directed antivirals [2]. Furthermore, cancer cells often exhibit upregulated translational activity to sustain rapid growth and survival, leading to the development of inhibitors that target specific ribosomal sites or regulatory factors [3]. While drugs like omacetaxine mepesuccinate are used clinically to treat certain leukemias by inhibiting the first step of protein synthesis, the primary challenge in targeting this machinery is achieving selectivity to avoid severe toxicity in non-diseased tissues [4]. Emerging research also explores the role of specialized ribosomes in specific tissues, which may offer more precise therapeutic opportunities in the future [5].

Other names

Eukaryotic ribosomeHost translation apparatus80S translation complexEukaryotic translational machinery

Inhibition of protein synthesis by blocking the ribosomal A-site, inhibiting eukaryotic initiation factors such as eIF4A, or inhibiting elongation factors like eEF1A.