Abstract:
:Cholera toxin (CT) is the major virulence factor produced by Vibrio cholerae. Several genomic arrangements within the CTX cassette have been elucidated in V. cholerae. Previously, it was shown that three different CTX cassette arrangements, one complete CTX cassette (arrangement A), one complete and two incomplete CTX cassettes (arrangement B), and two complete CTX cassettes (arrangement C), exist within V. cholerae isolates. In the present study, the level of CT expression by V. cholerae isolates carrying different CTX cassette arrangements was evaluated. Real-time quantitative PCR analysis showed unequal production of CT mRNA in V. cholerae isolates with different CTX arrangements. V. cholerae with the CTX arrangement C expressed more CT mRNA than isolates with the other CTX arrangements. In addition, CT mRNA was expressed more in the isolates with CTX arrangement B than in those with arrangement A. Overall, these results suggest that the arrangement and number of regulatory elements (rstA) within the CTX cassette could affect the level of expression of CT.
journal_name
J Med Microbioljournal_title
Journal of medical microbiologyauthors
Amin Marashi SM,Bakhshi B,Imani Fooladi AA,Tavakoli A,Sharifnia A,Pourshafie MRdoi
10.1099/jmm.0.038752-0subject
Has Abstractpub_date
2012-08-01 00:00:00pages
1071-1073issue
Pt 8eissn
0022-2615issn
1473-5644journal_volume
61pub_type
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