Approaches for Studying Context Specificity of Translation Inhibitor Action

The sequence of messenger RNA (mRNA) not only determines the protein sequence synthesized by a ribosome but also defines the efficiency of this process. Many antibiotics lethal to bacteria inhibit various stages of translation by targeting ribosomal functional centers. Some antibiotics exhibit specificity not only for particular stages of the ribosomal working cycle but also for specific patterns within mRNA sequences. This review covers a broad range of approaches-including in vivo and in vitro methods, low- and high-throughput techniques such as reporter constructs, characterization of inhibitors of protein synthesis (ChIPS), toeprinting, cryogenic electron microscopy (cryo-EM), protein labeling, and those integrated with next-generation sequencing (NGS) like ribosome profiling with following NGS (Ribo-seq), inverse toeprinting coupled with NGS (iTP-seq), high-throughput toeprinting and NGS (Toe-seq), and ribosome display-used to study the sequence specificity of translation inhibitors, a rapidly evolving field crucial to molecular biology. It presents various methodologies, discusses their applications, and provides a comparative analysis. The fundamental research value of this review lies in establishing standardized experimental selection guidelines for scientists investigating ribosome stalling mechanisms, thereby minimizing trial-and-error costs. Equally important is its applied relevance. The review highlights its translational value in aiding the screening and mechanistic analysis of sequence-specific small-molecule inhibitors. Moreover, understanding the mechanisms underlying protein biosynthesis inhibition and their dependence on particular mRNA sequences could enable the development of selective agents that precisely suppress the synthesis of certain polypeptides, such as proteins from pathogenic bacteria or cancer-associated proteins.