Crystallization of the GTP-dependent transcriptional regulator CodY from Bacillus subtilis.
نویسندگان
چکیده
CodY is a GTP sensor that represses transcription of early stationary phase and sporulation genes in Bacillus subtilis. As nutrients become limiting, GTP levels fall and CodY-mediated repression is relieved. Crystals of CodY have been grown in the presence and absence of GTP from sodium citrate buffered solutions containing lithium sulfate and diffraction data have been collected extending to 3.5 A spacing.
منابع مشابه
CodY regulates expression of the Bacillus subtilis extracellular proteases Vpr and Mpr.
UNLABELLED CodY is a global transcriptional regulator in low-G+C Gram-positive bacteria that is responsive to GTP and branched-chain amino acids. By interacting with its two cofactors, it is able to sense the nutritional and energetic status of the cell and respond by regulating expression of adaptive genetic programs. In Bacillus subtilis, more than 200 genes, including those for peptide trans...
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Many of the adaptive mechanisms that allow Bacillus subtilis to adjust to changes in nutrient availability are controlled by CodY. Binding of CodY to its target genes is stimulated by interaction with its effectors, GTP and the branched-chain amino acids (BCAAs). Upon nutrient limitation, intracellular pools of these effectors are depleted and CodY can no longer repress genes required for adapt...
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CodY is a branched-chain amino acid (BCAA) and GTP sensor and a global regulator of transcription in low G + C Gram-positive bacteria. It controls the expression of over 100 genes and operons, principally by repressing during growth genes whose products are required for adaptations to nutrient limitation. However, the mechanism by which BCAA binding regulates transcriptional changes is not clea...
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Here we examine the notion that cells in conditions of stress accumulate mutations in genes under selection via transcription processes. CodY is a global transcriptional regulator in many Gram positives, including soil and pathogenic microbes. In conditions of exponential growth and when branch chain amino acids and GTP are in abundance CodY acts as a transcriptional repressor of many metabolic...
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Additional targets of CodY, a GTP-activated repressor of early stationary-phase genes in Bacillus subtilis, were identified by combining chromatin immunoprecipitation, DNA microarray hybridization, and gel mobility shift assays. The direct targets of CodY newly identified by this approach included regulatory genes for sporulation, genes that are likely to encode transporters for amino acids and...
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ورودعنوان ژورنال:
- Acta crystallographica. Section D, Biological crystallography
دوره 59 Pt 1 شماره
صفحات -
تاریخ انتشار 2003