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- W3023851709 abstract "Abstract The facultative plant endophyte Azospirillum brasilense Sp245 synthesizes two high‐molecular‐weight lipopolysaccharides, LPSI and LPSII, which comprise identical d ‐rhamnan O ‐polysaccharides and, presumably different core oligosaccharides. Previously, using random insertion mutagenesis, we constructed the LpsII − mutant KM139 of strain Sp245 that possessed an Omegon‐Km insertion in plasmid AZOBR_p6. Here, we found that in KM139, Omegon‐Km disrupted the coding sequence AZOBR_p60126 for a putative glycosyltransferase related to mannosyltransferases and rhamnosyltransferases. To verify its function, we cloned the AZOBR_p60126 gene of strain Sp245 in the expression vector plasmid pRK415 and transferred the construct pRK415–p60126 into KM139. In the complemented mutant KM139 (pRK415–p60126), the wild‐type LPSI + LPSII + profile was recovered. We also compared the swimming and swarming motilities of strains Sp245, Sp245 (pRK415), KM139, KM139 (pRK415), and KM139 (pRK415–p60126). All these strains had the same flagellar‐dependent swimming speeds, but on soft media, the LpsI + LpsII − strains KM139 and KM139 (pRK415) swarmed significantly faster than the other LpsI + LpsII + strains. Such interstrain differences in swarming motility were more pronounced on 0.4% than on 0.5% soft agar plates. These data show that the AZOBR_p60126‐encoded putative glycosyltransferase significantly affects the lipopolysaccharide profile and, as a consequence, the social motility of azospirilla." @default.
- W3023851709 created "2020-05-13" @default.
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- W3023851709 date "2020-05-06" @default.
- W3023851709 modified "2023-10-16" @default.
- W3023851709 title "Plasmid gene AZOBR_p60126 impacts biosynthesis of lipopolysaccharide II and swarming motility in<i>Azospirillum brasilense</i>Sp245" @default.
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- W3023851709 doi "https://doi.org/10.1002/jobm.201900635" @default.
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