CysR Regulates Sulphur Metabolism in Corynebacterium glutamicum
Author Information
Author(s): Rückert Christian, Milse Johanna, Albersmeier Andreas, Koch Daniel J, Pühler Alfred, Kalinowski Jörn
Primary Institution: Institut für Systembiologie & Genomforschung, Universität Bielefeld
Hypothesis
CysR is a transcriptional regulator that controls genes involved in sulphur metabolism in Corynebacterium glutamicum.
Conclusion
CysR acts as a dual regulator, activating and repressing different genes in response to sulphide acceptor availability.
Supporting Evidence
- Deletion of the cysR gene resulted in the inability to utilize sulphate and aliphatic sulphonates.
- Microarray studies revealed significant changes in the expression of 49 genes with increased and 48 with decreased transcript levels in the presence of CysR.
- CysR binding to DNA was shown to depend on the presence of O-acetyl-L-serine or O-acetyl-L-homoserine.
Takeaway
CysR is like a traffic light for certain genes in a bacterium, telling them when to go or stop based on the presence of specific molecules.
Methodology
The study involved gene deletion, transcriptional studies, and DNA microarray hybridizations to analyze the effects of CysR on gene expression.
Digital Object Identifier (DOI)
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