UVC Irradiation Induces Time-Dependent Proteomic Remodeling in Geodermatophilus obscurus G20

UVC exposure at a median lethal dose remodels the proteome of Geodermatophilus obscurus G20 over time, with recovery showing distinct shifts in translation and peptidoglycan synthesis.

• Why it matters: Prior proteomic work in Geodermatophilus obscurus G20 linked proteins to genome sequence, but its stress-specific, time-dependent response to UV remained uncharacterized.
• What they did: The study used bottom-up proteomics with data independent acquisition on healthy cells and two 254 nm UV-stressed groups: acute recovery immediately after irradiation and a recovery group incubated for 1 hour.
• The result: NADH dehydrogenase activity increased in both stressed groups, while the 1-hour recovery group also showed reduced peptidoglycan synthesis and increased translational activity, informing temporal mechanisms of UV repair demands.

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