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  • Title: Synthesis and investigation of the antibacterial activity and action mechanism of 1,3,4-oxadiazole thioether derivatives.
    Author: Song X, Li P, Li M, Yang A, Yu L, Luo L, Hu D, Song B.
    Journal: Pestic Biochem Physiol; 2018 May; 147():11-19. PubMed ID: 29933979.
    Abstract:
    Various 1,3,4-oxadiazole thioether derivatives containing 2-chloro-5-methylene pyridine, 2-chloro-5-methylene thiazole, 3,4-dimethoxy-2-methylene pyridine, and N,N-dimethyl-2-ethylamino moieties were designed, synthesized, and assessed for their antibacterial activities against Xanthomonas oryzae pv. oryzae (Xoo) via the turbidimeter test in vitro. Preliminary bioassay results confirmed good antibacterial activities for most of these compounds. Among these substances, compound 6r showed the best inhibitory effect against Xoo, and its half-maximal effective concentration (EC50) value is 4.78μg/mL, which is superior to that of commercial agent bismerthiazol (87.55μg/mL). We then performed a label-free quantitative proteomic analysis of the response of Xoo to 6r. A total of 1363 proteins were identified in the control and treatment groups. Upon treatment with the minimum inhibitory concentration, 349 proteins were found to be differentially expressed (fold changes>1.5, p<0.05), enriched, and may be involved in purine metabolism.
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