Identification of Sinorhizobium meliloti Genes Regulated during Symbiosis
AUTOR(ES)
Cabanes, Didier
FONTE
American Society for Microbiology
RESUMO
RNA fingerprinting by arbitrarily primed PCR was used to isolate Sinorhizobium meliloti genes regulated during the symbiotic interaction with alfalfa (Medicago sativa). Sixteen partial cDNAs were isolated whose corresponding genes were differentially expressed between symbiotic and free-living conditions. Thirteen sequences corresponded to genes up-regulated during symbiosis, whereas three were instead repressed during establishment of the symbiotic interaction. Seven cDNAs corresponded to known or predicted nif and fix genes. Four presented high sequence similarity with genes not yet identified in S. meliloti, including genes encoding a component of the pyruvate dehydrogenase complex, a cell surface protein component, a copper transporter, and an argininosuccinate lyase. Finally, five cDNAs did not exhibit any similarity with sequences present in databases. A detailed expression analysis of the nine non-nif-fix genes provided evidence for an unexpected variety of regulatory patterns, most of which have not been described so far.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=94531Documentos Relacionados
- Transcriptome analysis of Sinorhizobium meliloti during symbiosis
- Differential Regulation of Two Divergent Sinorhizobium meliloti Genes for HPII-Like Catalases during Free-Living Growth and Protective Role of Both Catalases during Symbiosis
- Identification of an Iron-Regulated, Hemin-Binding Outer Membrane Protein in Sinorhizobium meliloti
- Rhizobium (Sinorhizobium) meliloti phn Genes: Characterization and Identification of Their Protein Products
- Identification of Two Quorum-Sensing Systems in Sinorhizobium meliloti