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. 1984 Oct;46(1):188–194. doi: 10.1128/iai.46.1.188-194.1984

Outer membrane proteins from rough strains of four Brucella species.

J M Santos, D R Verstreate, V Y Perera, A J Winter
PMCID: PMC261446  PMID: 6480106

Abstract

Outer membrane proteins from 15 rough strains of Brucella abortus, B. ovis, B. canis, and B. melitensis were extracted with a dipolar detergent, and outer membrane proteins from selected strains were purified by anion exchange chromatography and gel filtration (Verstreate et al., Infect. Immun. 35:979-989, 1982). Outer membrane proteins produced two types of profiles on sodium dodecyl sulfate-polyacrylamide gel electrophoresis. One type, demonstrated by B. abortus, B. ovis, and B. canis strains, contained the three predominant protein groups present in smooth B. abortus strains (Verstreate et al., Infect. Immun. 35:979-989, 1982): groups 1, 2 (porin [Douglas et al., Infect. Immun. 44:16-21]), and 3. B. melitensis strains demonstrated the second profile type, in which there was an additional band between groups 1 and 2. The relative proportion of porin was considerably lower in B. ovis, B. canis, and B. melitensis than in B. abortus. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis profiles could be used to distinguish B. abortus and B. melitensis from each other and from B. canis and B. ovis. The amino acid compositions of groups 2 and 3 from rough strains of B. abortus, B. canis, and B. melitensis were similar to those of corresponding proteins from smooth B. abortus strains. Zwittergent-soluble fractions from most rough strains contained antigen [b], which cross-reacted with group 2 from smooth B. abortus strains, and antigens [c] and [d], which cross-reacted with group 3 from smooth B. abortus strains. Antigen [a], shared by groups 2 and 3 (D. R. Verstreate and A. J. Winter, Infect. Immun. 46:182-187, 1984), was detected in most rough strains. None of these antigens were related to either rough or smooth lipopolysaccharide.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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