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A metabolic enzyme doing double duty as a transcription factor

✍ Scribed by Anjana Bhardwaj; Miles F. Wilkinson

Book ID: 101707806
Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 71 KB
Volume: 27
Category: Article
ISSN: 0265-9247
DOI: 10.1002/bies.20232

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✦ Synopsis

Abstract

Many kinds of multifunctional regulatory proteins have been identified that perform distinct biochemical functions in the nucleus, the cytoplasm, or both. Here we describe the recent discovery by Hall et al. (2004)1 of a new type of multifunctional protein: a metabolic enzyme that doubles as a transcription factor. This enzyme, Arg5,6, functions as a catalytic enzyme in ornithine biosynthesis and also binds and regulates the promoters of nuclear and mitochondrial genes. It may also regulate precursor mRNA metabolism. We discuss how proteins that serve as both metabolic enzymes and transcription factors might have evolved. BioEssays 27:467–471, 2005. © 2005 Wiley Periodicals, Inc.

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