Functional substitution of a eukaryotic glycyl-tRNA synthetase with an evolutionarily unrelated bacterial cognate enzyme

Two oligomeric types of glycyl-tRNA synthetase (GlyRS) are found in nature: a α2 type and a α2β2 type. The former has been identified in all three kingdoms of life and often pairs with tRNAGly that carries an A73 discriminator base, while the latter is found only in bacteria and chloroplasts and is...

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Veröffentlicht in:PloS one 2014-04, Vol.9 (4), p.e94659-e94659
Hauptverfasser: Chien, Chin-I, Chen, Yu-Wei, Wu, Yi-Hua, Chang, Chih-Yao, Wang, Tzu-Ling, Wang, Chien-Chia
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Chang, Chih-Yao
Wang, Tzu-Ling
Wang, Chien-Chia
description Two oligomeric types of glycyl-tRNA synthetase (GlyRS) are found in nature: a α2 type and a α2β2 type. The former has been identified in all three kingdoms of life and often pairs with tRNAGly that carries an A73 discriminator base, while the latter is found only in bacteria and chloroplasts and is almost always coupled with tRNAGly that contains U73. In the yeast Saccharomyces cerevisiae, a single GlyRS gene, GRS1, provides both the cytoplasmic and mitochondrial functions, and tRNAGly isoacceptors in both compartments possess A73. We showed herein that Homo sapiens and Arabidopsis thaliana cytoplasmic GlyRSs (both α2-type enzymes) can rescue both the cytoplasmic and mitochondrial defects of a yeast grs1- strain, while Escherichia coli GlyRS (a α2β2-type enzyme) and A. thaliana organellar GlyRS (a (αβ)2-type enzyme) failed to rescue either defect of the yeast mull allele. However, a head-to-tail αβ fusion of E. coli GlyRS effectively supported the mitochondrial function. Our study suggests that a α2-type eukaryotic GlyRS may be functionally substituted with a α2β2-type bacterial cognate enzyme despite their remote evolutionary relationships.
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Our study suggests that a α2-type eukaryotic GlyRS may be functionally substituted with a α2β2-type bacterial cognate enzyme despite their remote evolutionary relationships.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>24743154</pmid><doi>10.1371/journal.pone.0094659</doi><oa>free_for_read</oa></addata></record>
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subjects Amino acids
Aminoacylation
Animals
Arabidopsis thaliana
Bacteria
Bacteria - enzymology
Baking yeast
Base Sequence
Biology and Life Sciences
Chloroplasts
Cloning, Molecular
Compartments
Cytoplasm
Defects
E coli
Enzymes
Escherichia coli
Eukaryota - enzymology
Evolution, Molecular
Gene Knockout Techniques
Genes
Genetic aspects
Glycine-tRNA ligase
Glycine-tRNA Ligase - chemistry
Glycine-tRNA Ligase - deficiency
Glycine-tRNA Ligase - genetics
Glycine-tRNA Ligase - metabolism
Humans
Isoacceptors
Life sciences
Mitochondria
Mitochondria - genetics
Mitochondria - metabolism
Molecular evolution
Physiological aspects
Plant mitochondria
Protein Multimerization
Protein Structure, Quaternary
Protein Transport
Proteins
RNA polymerases
Saccharomyces cerevisiae
Transfer RNA
tRNA
Yeast
title Functional substitution of a eukaryotic glycyl-tRNA synthetase with an evolutionarily unrelated bacterial cognate enzyme
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