Abstract
Mitochondria of many species import of nuclear DNA-encoded tRNAs. This widely spread but poorly studied phenomenon proved to be a promising tool for mitochondrial transfection. In yeast Saccharomyces cerevisiae, one cytosolic tRNAs(Lys) is partially targeted into mitochondria. Previous studies have shown that binding of this tRNA to its putative protein carrier, the precursor of mitochondrial lysyl-tRNA synthetase (preMsk1p), IIb class aminoacyl-tRNA synthetase, was a pre-requisite of import. In this work, we identify the hinge region with two adjacent helices H5 and H7 to be responsible for mitochondrial targeting of the tRNA and characterize preMsk1p versions with altered tRK1 import capacities.
Copyright 2010 Mitochondria Research Society. Published by Elsevier B.V. All rights reserved.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Amino Acid Sequence
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Binding Sites
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Carrier Proteins / genetics
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Carrier Proteins / metabolism*
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Lysine-tRNA Ligase / genetics
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Lysine-tRNA Ligase / metabolism*
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Mitochondrial Proteins / genetics
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Mitochondrial Proteins / metabolism*
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Models, Molecular
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Molecular Sequence Data
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Mutant Proteins / genetics
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Mutant Proteins / metabolism
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Mutation
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Protein Precursors / genetics
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Protein Precursors / metabolism*
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Protein Structure, Tertiary
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RNA, Transfer, Lys / metabolism*
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Saccharomyces cerevisiae / physiology*
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Saccharomyces cerevisiae Proteins / genetics
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Saccharomyces cerevisiae Proteins / metabolism*
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Sequence Alignment
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Sequence Deletion
Substances
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Carrier Proteins
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Mitochondrial Proteins
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Mutant Proteins
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Protein Precursors
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RNA, Transfer, Lys
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Saccharomyces cerevisiae Proteins
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Lysine-tRNA Ligase