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  • Title: Isolation and nucleotide sequence of the gene encoding cytotoxic necrotizing factor 1 of Escherichia coli.
    Author: Falbo V, Pace T, Picci L, Pizzi E, Caprioli A.
    Journal: Infect Immun; 1993 Nov; 61(11):4909-14. PubMed ID: 8406895.
    Abstract:
    Cytotoxic necrotizing factors (CNFs) are dermonecrotic protein toxins produced by human and animal clinical isolates of Escherichia coli. In this study, the CNF1 determinant was isolated and sequenced, showing that expression of biologically active toxin is governed by a unique open reading frame encoding a protein of 1,014 amino acids with a predicted molecular mass of 113.7 kDa. Nucleotide and protein data base searches showed significant homology between CNF1 and the dermonecrotic toxin of Pasteurella multocida. In particular, the two toxins were found to share a hydrophobic region of about 220 amino acids which is a potential membrane-spanning domain.
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