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The Yeast ARGRII Regulatory Protein Has Homology with Various RNases and DNA Binding Proteins

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Journal Mol Gen Genet
Date 1988 Jan 1
PMID 3125409
Citations 10
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Abstract

Three regulatory proteins are involved in the post-transcriptional control of arginine metabolism in Saccharomyces cerevisiae: ARGRI, ARGRII and ARGRIII. The 880 amino acid ARGRII protein, like some DNA binding proteins, possesses in its N-terminal sequence a cysteine-rich region that presents homology to the zinc binding region of Escherichia coli aspartate transcarbamylase. ARGRII also has a region of 90 amino acids that is 30% homologous to the E. coli ARGR repressor. Moreover a 87 amino acid long sequence of ARGRII contains three stretches with significant homology to some viral, bacterial and pancreatic RNases. We propose a model in which the RNase-like sequence could regulate the expression of arginine anabolic messenger RNAs.

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