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PMID: 3539804 Published · ppublish English Journal Article

Role of the A subunit of pertussis toxin in alteration of Chinese hamster ovary cell morphology.

Infection and immunity ·Vol. 55 ·No. 1 ·1987-01-00 ·Pages 24-8

Burns DL, Kenimer JG, Manclark CR

Abstract

The mechanism by which pertussis toxin induces morphological changes in Chinese hamster ovary cells was studied to determine whether the resulting clustered growth pattern is due to toxin-catalyzed ADP-ribosylation of a cellular substrate. While pertussis toxin was extremely potent in inducing morphological changes in Chinese hamster ovary cells, preparations of isolated A subunit or B oligomer exhibited greatly reduced activity. The clustered growth response of these cells correlated with ADP-ribosylation of a 41-kilodalton cellular substrate for the toxin in that the toxin concentration and time of exposure to the toxin required for ADP-ribosylation were the same as those needed for alterations in cellular morphology. Moreover, pertussis toxin modified by either chemical or photolytic methods exhibited similar decreases in the ability to ADP-ribosylate the cellular substrate and alter cell morphology. These results suggest that clustering of Chinese hamster ovary cells is due to toxin-catalyzed ADP-ribosylation of a 41-kilodalton substrate. Therefore, alteration in Chinese hamster ovary cell morphology can be used as a measure of toxin activity. This assay should prove to be a useful tool in the development and evaluation of new pertussis vaccines.

MeSH Terms
Adenosine Diphosphate Ribose/physiology Animals Cell Aggregation/drug effects Cells, Cultured/cytology,drug effects Cricetinae Cricetulus Female Molecular Weight Ovary Pertussis Toxin Proteins/metabolism Time Factors Virulence Factors, Bordetella/pharmacology
Chemicals
Proteins Virulence Factors, Bordetella Adenosine Diphosphate Ribose Pertussis Toxin
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Burns D L
Kenimer J G
Manclark C R
References (26)
26 references, click to expand
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Article Info
Journal
Infection and immunity
Abbr.
Infect Immun
ISSN
0019-9567
DOI
10.1128/iai.55.1.24-28.1987
Published
1987-01-00
Pages
24-8
Language
English
Region
United States
NLM ID
0246127
PMCID
PMC260275
Subset
IM
External Links
PubMed source DOI: 10.1128/iai.55.1.24-28.1987 PMC Full Text View journal details
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