Inactivation of the gene encoding zinc-binding lipoprotein 103 impairs the infectivity of Streptococcus suis

Jesús Aranda, Laura Teixidó, Nahuel Fittipaldi, Pilar Cortés, Montserrat Llagostera, Marcelo Gottschalk, Jordi Barbé

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)

Abstract

The Streptococcus suis 103gene product is an immunogenic and protective lipoprotein that is a component of an ATP-binding cassette transporter implicated in zinc uptake. Belonging to the same transcriptional unit and downstream of the 103 gene is a gene that encodes a homologue of the pneumococcal histidine triad (Pht) protein Pht309. In an intraperitoneal mouse model the virulence of a mutant lacking the 103 gene was more than 50 times lower than that of the wild-type (WT) parent strain, S. suis serotype 2 strain P1/7. In addition, the immunogenicity of this mutant was dramatically decreased. In striking contrast, the virulence and immunogenicity of a P1/7 mutant lacking the Pht309 gene were similar to those of the parent strain. These results demonstrate that the 103 lipoprotein is strongly involved in S. suis virulence and support the hypothesis that this lipoprotein might be an excellent candidate for vaccines aiming to achieve broad protection against streptococci.
Original languageEnglish
Pages (from-to)72-76
JournalCanadian Journal of Veterinary Research
Volume76
Issue number1
Publication statusPublished - 13 Jan 2012

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