Journal: Antibiotics
Article Title: Tiamulin-Resistant Mutants of the Thermophilic Bacterium Thermus thermophilus
doi: 10.3390/antibiotics9060313
Figure Lengend Snippet: Sites of mutations and inferred mechanisms of resistance. ( A ) Sequence alignment of ribosomal protein uL3 encompassing the sites of mutations identified in this study. Uses organisms for whom tiamulin-resistance mutations in uL3 have been found. Tth, Thermus thermophilus (Accession number Q72I04); Dra, Deinococcus radiodurans (Accession number Q9RXK2); Eco, Escherichia coli (Accession number P60438); Sau, Staphylococcus aureus (Accession number P60449); Bhy, Brachyspira hyodysenteriae (Accession number A0A2K9JGD3) ( B ) Interaction of ribosomal protein uL3 and 23S rRNA at the tiamulin binding site, based on the crystal structures of ribosomes from T. thermophilus (PDB entry 4y4p.cif; 36) and D. radiodurans (PDB entry 1xbp.cif; 8). Structures were aligned and images rendered using PyMOL (Schrodinger). R149 is within hydrogen bonding distance of the 2’ hydroxyl of U2504 and the phosphate oxygen of U2506. ( C ) Interactions between tiamulin and 23S rRNA in the D. radiodurans (PDB entry 1xbp.cif; 8) 50S subunit structure. Sites of mutation conferring resistance are colored red, sites of mutations not conferring resistance are colored blue.
Article Snippet: All mutants were derived from the T. thermophilus strains HB27 (ATCC BAA-163) [ ] or IB-21 [ ].
Techniques: Sequencing, Binding Assay, Mutagenesis