[Alteration of cholera toxin biosynthesis in Vibrio cholerae 01 as a result of temperate phage 139 integration into bacterial chromosome].
Infection of V. cholerae 01 (classical and eltor biovars) cells with the temperate cholera phage 139 derived from V. cholerae serogroup 0139 followed by integration of the phage genome into the bacterial chromosome significantly increased the production of cholera toxin, the main virulence factor. The level of toxin biosynthesis in the lysogenic V. cholerae classical strain increased 3-fold and that in V. eltor thirty times in comparison with the parental strains. Increased production of cholera toxin was not associated with an increase in the number of copies of genes involved in its biosynthesis but seemed to be due to changes in toxinogenesis regulation.
Mikrob, Russian Institute for Plague Control, Saratov.
G A
GA
Eroshenko
N I
NI
Smirnova
D018829:Adhesins, Bacterial / Q000235:genetics / Q000378:metabolism; D001425:Bacterial Outer Membrane Proteins / Q000235:genetics / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D001435:Bacteriophages / Q000502:physiology*; D002772:Cholera Toxin / Q000096:biosynthesis* / Q000235:genetics; D002876:Chromosomes, Bacterial; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism; D018628:Gene Dosage; D008242:Lysogeny; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D014734:Vibrio cholerae / Q000235:genetics* / Q000378:metabolism*
D018829:Adhesins, Bacterial; D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; C096349:OmpU protein, Vibrio cholerae; D014157:Transcription Factors; C499324:toxR protein, Vibrio cholerae; C066719:toxR protein, bacteria; D002772:Cholera Toxin