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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

pilO, a gene required for glycosylation of Pseudomonas aeruginosa 1244 pilin.

Nucleotide sequencing of a region downstream from the Pseudomonas aeruginosa 1244 pilin structural gene, pilA, revealed an ORF potentially able to code for a protein of M(r) 50,862. This ORF, called pilO, was flanked by a tRNAthr gene, which was followed by a transcriptional termination sequence. The tRNAthr gene and the termination sequence were nearly identical to sequences found immediately adjacent to the pilA gene of several P. aeruginosa strains. A 2200 base mRNA strand, which contained both the pilO and pilA transcripts, was produced from this region, while a 650 base transcript containing only pilA was present in a 100-fold excess over the longer transcript. Hyperexpression of the pilA gene in a PilO- strain resulted in normal pilus-specific phage sensitivity and twitching motility. The pilin produced by this strain had a lower apparent M(r) and a more neutral pl compared to that produced by a strain containing a functional pilO gene. This pilin failed to react with a sugar-specific reagent which recognized pilin produced by the strain containing a functional pilO gene.[1]


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