Exoribonuclease superfamilies: structural analysis and phylogenetic distribution

Exoribonucleases play an important role in all aspects of RNA metabolism. Biochemical and genetic analyses in recent years have identified many new RNases and it is now clear that a single cell can contain multiple enzymes of this class. Here, we analyze the structure and phylogenetic distribution o...

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Veröffentlicht in:	Nucleic acids research 2001-03, Vol.29 (5), p.1017-1026
Hauptverfasser:	Zuo, Y, Deutscher, M P
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Sprache:	eng
Schlagworte:	Amino Acid Sequence Animals Exoribonucleases - genetics Humans Molecular Sequence Data Phylogeny ribonuclease Sequence Alignment
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description	Exoribonucleases play an important role in all aspects of RNA metabolism. Biochemical and genetic analyses in recent years have identified many new RNases and it is now clear that a single cell can contain multiple enzymes of this class. Here, we analyze the structure and phylogenetic distribution of the known exoribonucleases. Based on extensive sequence analysis and on their catalytic properties, all of the exoribonucleases and their homologs have been grouped into six superfamilies and various subfamilies. We identify common motifs that can be used to characterize newly-discovered exoribonucleases, and based on these motifs we correct some previously misassigned proteins. This analysis may serve as a useful first step for developing a nomenclature for this group of enzymes.
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subjects	Amino Acid Sequence Animals Exoribonucleases - genetics Humans Molecular Sequence Data Phylogeny ribonuclease Sequence Alignment
title	Exoribonuclease superfamilies: structural analysis and phylogenetic distribution
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