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Publication Abstract from PubMed

We recently reported the conception and synthesis of cresomycin (CRM), a fully synthetic lincosamide antibiotic effective in vitro and in vivo against multidrug-resistant Gram-positive and Gram-negative bacteria. In this work, we describe the chemical synthesis and characterization of CRM sulfur atom replacement analogs C-CRM (S --> CH(2)), O-CRM (S --> O), and Se-CRM (S --> Se). Comparison of high-resolution co-crystal structures showed that the four analogs adopted identical conformations when bound to the bacterial ribosome, but due to variations of </=1 A in the bond lengths between the anomeric carbon and the varied atoms, only the S and Se heteroatoms of CRM and Se-CRM, respectively, were positioned to interact with the pi-face of nucleobase G2505. C-CRM and O-CRM did not benefit from such stabilizations, with correspondingly negative consequences in both target engagement and antibacterial activities. We therefore conclude that the sulfur atom of the lincosamides is important in ribosomal binding.

Why Sulfur is Important in Lincosamide Antibiotics.,Wu KJY, Aleksandrova EV, Robinson PJ, Benedetto AE, Yu M, Tresco BIC, See DNY, Jiang T, Ramkissoon A, Dunand CF, Svetlov MS, Lee J, Polikanov YS, Myers AG Chem. 2025 Jul 10;11(7):102480. doi: 10.1016/j.chempr.2025.102480. Epub 2025 Mar , 7. PMID:40787583^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.