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- W2108646037 abstract "The chromosomal locus pscA (exoC) of Agrobacterium tumefaciens LBA4301 has been cloned by complementation of the avirulent and exopolysaccharide (EPS)-deficient mutant LBA4301 pscA. We have also identified a new locus, termed psdA (polysaccharide depression) and located 16 kilobases from pscA in the A. tumefaciens chromosome, that negatively affects EPS production when it is present in more than one copy in A. tumefaciens LBA4301. Subcloning, transposon mutagenesis, and transcriptional analysis have been conducted for both loci and indicate that pscA and psdA are transcribed in the same orientation. Acidic-EPS assays showed that psdA depresses succinoglycan production and that its negative effect increases with the copy number of the gene. Virulence tests of psdA transconjugants on Datura stramonium showed no visible alteration in virulence, while LBA4301 pscA was totally avirulent." @default.
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- W2108646037 date "1989-03-01" @default.
- W2108646037 modified "2023-09-27" @default.
- W2108646037 title "Two chromosomal loci involved in production of exopolysaccharide in Agrobacterium tumefaciens" @default.
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- W2108646037 doi "https://doi.org/10.1128/jb.171.3.1755-1759.1989" @default.
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