(Mtb) is a pathogenic bacterium that causes tuberculosis, which kills more than 1.5 million people worldwide every year. Strains resistant to available antibiotics pose a significant healthcare problem. The enormous complexity of the ribosome poses a barrier for drug discovery. We have overcome this in a tractable way by using an RNA segment that represents the peptidyl transferase center as a target. By using a novel combination of NMR transverse relaxation times ( ) and computational chemistry approaches, we have obtained improved inhibitors of the Mtb ribosomal PTC. Two phenylthiazole derivatives were predicted by machine learning models as effective inhibitors, and this was confirmed by their IC values, which were significantly improved over standard antibiotic drugs.
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http://dx.doi.org/10.1039/c9sc02520k | DOI Listing |
Nat Struct Mol Biol
December 2024
Structural and Computational Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany.
Ribosome-targeting antibiotics represent an important class of antimicrobial drugs. Chloramphenicol (Cm) is a well-studied ribosomal peptidyl transferase center (PTC) binder and growing evidence suggests that its inhibitory action depends on the sequence of the nascent peptide. How such selective inhibition on the molecular scale manifests on the cellular level remains unclear.
View Article and Find Full Text PDFNucleic Acids Res
January 2025
Institute of Medical Physics and Biophysics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Charitéplatz 1, 10117 Berlin, Germany.
Chemical modifications of ribosomal RNAs (rRNAs) and proteins expand their topological repertoire, and together with the plethora of bound ligands, fine-tune ribosomal function. Detailed knowledge of this natural composition provides important insights into ribosome genesis and function and clarifies some aspects of ribosomopathies. The discovery of new structural properties and functional aspects of ribosomes has gone hand in hand with cryo-electron microscopy (cryo-EM) and its technological development.
View Article and Find Full Text PDFEur J Med Chem
January 2025
Henan Key Laboratory of Rare Earth Functional Materials, Henan International Joint Laboratory of Biomedical Nanomaterials, Zhoukou Normal University, Zhoukou, 466001, Henan, China. Electronic address:
Methicillin-resistant Staphylococcus aureus (MRSA) remains a significant global health threat, necessitating the development of new therapeutic agents. Pleuromutilin derivatives offer a promising solution due to their potent antibacterial activity, particularly against Gram-positive bacteria such as MRSA. In this study, we synthesized a series of pleuromutilin derivatives with phenol linker containing C14 side chains and evaluated in vitro and in vivo antibacterial activities.
View Article and Find Full Text PDFHeliyon
November 2024
Department of Psychiatry and Behavioral Neurobiology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
Emerging evidence underscores the critical role of impaired mRNA translation in various neurobiological conditions. Ribosomal RNA (rRNA), essential for protein synthesis, undergoes crucial post-transcriptional modifications such as 2'-O-ribose methylation, pseudouridylation, and base modifications. These modifications, particularly 2'-O-ribose methylation is vital for stabilizing rRNA structures and optimizing translation efficiency by regulating RNA integrity and its interactions with proteins.
View Article and Find Full Text PDFMethicillin-resistant Staphylococcus aureus (MRSA) is one of the main pathogens associated with nosocomial and community infections that are difficult to treat owing to its resistance to all β-lactams and other classes of antibiotics. Reports of MRSA demonstrate the pathogen relevance and urgency for developing innovative diagnostic and treatment strategies against this microorganism. In this context, monoclonal antibodies (mAbs) represent a powerful tool for such purposes.
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