Control of Gluconate Utilization in Sinorhizobium meliloti
نویسندگان
چکیده
منابع مشابه
Control of gluconate utilization in Sinorhizobium meliloti.
The Sinorhizobium meliloti megaplasmid pSymA has previously been implicated in gluconate utilization. We report a locus on pSymA encoding a putative tripartite ATP-independent periplasmic (TRAP) transporter that is required for gluconate utilization. The expression of this locus is negatively regulated by a GntR family regulator encoded adjacent to the transporter operon.
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It was found that S. meliloti strain SmA818, which is cured of pSymA, could not grow on defined medium containing only formate and bicarbonate as carbon sources. Growth experiments showed that Rm1021 was capable of formate/bicarbonate-dependent growth, suggesting that it was capable of autotrophic-type growth. The annotated genome of S. meliloti Rm1021 contains three formate dehydrogenase genes...
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Background: For bacteria, it is important for survival to sense their population density or quorum. We use a well-known quorum sensing system of the nitrogen-fixing bacterium Sinorhizobium meliloti in order to study and model its molecular basis. The quorum sensing system depends upon the players ExpR, SinR, SinI and AHL, the signaling molecule within the system. Results: We present a minimal m...
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Sinorhizobium meliloti Rm41 nodulates alfalfa plants, forming indeterminate type nodules. It is characterized by a strain-specific K-antigen able to replace exopolysaccharides in promotion of nodule invasion. We present the Rm41 genome, composed of one chromosome, the chromid pSymB, the megaplasmid pSymA, and the nonsymbiotic plasmid pRme41a.
متن کاملShmR is essential for utilization of heme as a nutritional iron source in Sinorhizobium meliloti.
The bacterium Sinorhizobium meliloti is able to use heme as a nutritional iron source. Here, we show that the iron-regulated shmR gene encodes an outer membrane protein required for growth on heme. Furthermore, an shmR mutant is resistant to the toxic heme analog gallium protoporphyrin. Thus, the receptor protein of the heme transport system has been identified in S. meliloti.
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 2009
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.01317-08