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Gene. 1984 Dec;32(1-2):83-90.

Nucleotide sequence of the gene encoding the F72 fimbrial subunit of a uropathogenic Escherichia coli strain.


The cloned DNA fragment encoding the F72 fimbrial subunit from the uropathogenic Escherichia coli strain AD110 has been identified. The nucleotide sequence of the structural gene and of 196 bp of the noncoding region preceding the gene was determined. The structural gene codes for a polypeptide of 188 amino acid residues, including a 21-residue N-terminal signal sequence. The nucleotide sequence and the deduced amino acid sequence of the F72 gene were compared with the reported sequences of the papA gene (B├ąga et al., 1984). Both genes code for subunits of fimbriae that are involved in mannose-resistant hemagglutination (MRHA) of human erythrocytes. The available data show that there is absolute homology between the noncoding regions preceding both genes over 129 bp. The two proteins are homologous at the N terminus and C terminus; there is less, but significant, homology in the region between the N and C termini.

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