Journal: Antimicrobial Agents and Chemotherapy
Article Title: Ribosomal protection as a linezolid resistance mechanism in Mycobacterium abscessus
doi: 10.1128/aac.01605-25
Figure Lengend Snippet: MAB_2736c protects purified ribosomes against linezolid. ( A ) Schematic of cell-free transcription/translation assay derived from E. coli . DHFR = Dihydrofolate reductase. ( B ) mNeonGreen fluorescence when co-expressed with DHFR in the presence of 25 μM, 50 μM, and 100 µM linezolid or DMSO. n = 5 independent samples. ( C ) mNeonGreen fluorescence when co-expressed with MAB_2736c in the presence of 25 μM, 50 μM, and 100 µM linezolid or DMSO. n = 5 independent samples. ( D ) Relative protein synthesis rate for mNeonGreen co-expressed with MAB_2736c or DHFR in the presence of 25 μM, 50 μM, or 100 μM linezolid, or DMSO. Rates were calculated from post-linezolid addition until 105 min elapsed. Data are presented as individual values along with mean +/− SD. P -values derived from Šídák’s multiple comparisons test after two-way ANOVA. n = 5 biological replicates.
Article Snippet: Plasmids carrying MAB_2736c or mNeonGreen compatible with the PURExpress in vitro protein synthesis kit were cloned into the manufacturer’s PURExpress DHFR Control Plasmid (E6800L, NEB) by swapping out DHFR with MAB_2736c (PCR amplified from ATC19977 gDNA) or mNeonGreen using standard restriction cloning with NdeI (R0111S, NEB) and PacI (R0527S, NEB).
Techniques: Purification, Derivative Assay, Fluorescence