Catabolite-repression-like phenomenon in Rhizobium meliloti
نویسندگان
چکیده
منابع مشابه
Carbon metabolism and catabolite repression in Rhizobium spp.
The Gram-negative soil bacteria of the family Rhizobiaceae can fonn nodules on the roots of leguminous plants and as a result are able to fix nitrogen. This partnership is highly specific as particular legumes are generally infected by one rhizobial species only (for example alfalfa by R. meliloti and soybean by B. japonicum'i. The establishment of the symbiosis is a multistepped, interactive p...
متن کاملControl of inducer accumulation plays a key role in succinate-mediated catabolite repression in Sinorhizobium meliloti.
The symbiotic, nitrogen-fixing bacterium Sinorhizobium meliloti favors succinate and related dicarboxylic acids as carbon sources. As a preferred carbon source, succinate can exert catabolite repression upon genes needed for the utilization of many secondary carbon sources, including the alpha-galactosides raffinose and stachyose. We isolated lacR mutants in a genetic screen designed to find S....
متن کاملHPrK regulates succinate-mediated catabolite repression in the gram-negative symbiont Sinorhizobium meliloti.
The HPrK kinase/phosphatase is a common component of the phosphotransferase system (PTS) of gram-positive bacteria and regulates catabolite repression through phosphorylation/dephosphorylation of its substrate, the PTS protein HPr, at a conserved serine residue. Phosphorylation of HPr by HPrK also affects additional phosphorylation of HPr by the PTS enzyme EI at a conserved histidine residue. S...
متن کاملCharacterization of a two-component regulatory system that regulates succinate-mediated catabolite repression in Sinorhizobium meliloti.
When they are available, Sinorhizobium meliloti utilizes C(4)-dicarboxylic acids as preferred carbon sources for growth while suppressing the utilization of some secondary carbon sources such as α- and β-galactosides. The phenomenon of using succinate as the sole carbon source in the presence of secondary carbon sources is termed succinate-mediated catabolite repression (SMCR). Genetic screenin...
متن کاملYeast carbon catabolite repression.
Glucose and related sugars repress the transcription of genes encoding enzymes required for the utilization of alternative carbon sources; some of these genes are also repressed by other sugars such as galactose, and the process is known as catabolite repression. The different sugars produce signals which modify the conformation of certain proteins that, in turn, directly or through a regulator...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1978
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.136.3.1197-1200.1978