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Regulation of Gene Expression by a Metabolic Enzyme
David A. Hall,1
Heng Zhu,2*
Xiaowei Zhu,3
Thomas Royce,1
Mark Gerstein,1
Michael Snyder1,2
Abstract:
Gene expression in eukaryotes is normally believed to be controlledby transcriptional regulators that activate genes encoding structuralproteins and enzymes. To identify previously unrecognized DNAbinding activities, a yeast proteome microarray was screenedwith DNA probes; Arg5,6, a well-characterized mitochondrialenzyme involved in arginine biosynthesis, was identified. Chromatinimmunoprecipitation experiments revealed that Arg5,6 is associatedwith specific nuclear and mitochondrial loci in vivo, and Arg5,6binds to specific fragments in vitro. Deletion of Arg5,6 causesaltered transcript levels of both nuclear and mitochondrialtarget genes. These results indicate that metabolic enzymescan directly regulate eukaryotic gene expression.
1 Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 065208005, USA. 2 Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 065208005, USA. 3 Program in Computational Biology and Bioinformatics, Yale University, New Haven, CT 065208005, USA.
* Present address: Department of Pharmacology and the High ThroughputBiology Center, Johns Hopkins University School of Medicine,Baltimore, MD 21205, USA.
To whom the correspondence should be addressed. E-mail: michael.snyder{at}yale.edu
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