| Literature DB >> 14573688 |
Abstract
The cytolethal distending toxin (CDT) of Haemophilus ducreyi is comprised of the CdtA, CdtB, and CdtC proteins, with the CdtB protein having demonstrated enzymatic (i.e., DNase) activity. Using a single recombinant Escherichia coli strain with two plasmids individually containing the H. ducreyi cdtA and cdtC genes, we purified a noncovalent CdtA-CdtC complex. Incubation of this CdtA-CdtC complex with HeLa cells blocked killing of these cells by CDT holotoxin. Furthermore, the addition of purified recombinant CdtB to HeLa cells preincubated with the CdtA-CdtC complex resulted in the killing of these human epithelial cells.Entities:
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Year: 2003 PMID: 14573688 PMCID: PMC219598 DOI: 10.1128/IAI.71.11.6633-6640.2003
Source DB: PubMed Journal: Infect Immun ISSN: 0019-9567 Impact factor: 3.441