Cited by 60RNA and protein synthesis mechanismsMitochondrial Function and PathologyRNA modifications and cancer

In vitro 3'-end endonucleolytic processing defect in a human mitochondrial tRNASer(UCN) precursor with the U7445C substitution, which causes non-syndromic deafness

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Levinger, L.·2001·Nucleic Acids Research

Abstract

Eukaryotic tRNAs are transcribed as precursors. A 5'-end leader and 3'-end trailer are endonucleolytically removed by RNase P and 3'-tRNase before 3'-end CCA addition, aminoacylation, nuclear export and translation. 3'-End -CC can be a 3'-tRNase anti-determinant with the ability to prevent mature tRNA from recycling through 3'-tRNase. Twenty-two tRNAs punctuate the two rRNAs and 13 mRNAs in long, bidirectional mitochondrial transcripts. Accurate mitochondrial gene expression thus depends on endonucleolytic excision of tRNAs. Various mitochondrial diseases and syndromes could arise from defective tRNA end processing. The U7445C substitution in the human mitochondrial L-strand transcript (U74C directly following the discriminator base of tRNA(Ser(UCN))) causes non-syndromic deafness. The sequence of the precursor (G/UCU) becomes G/CCU, resembling a 3'-tRNase anti-determinant. We demonstrate that a tRNA(Ser(UCN)) precursor with the U7445C substitution cannot be processed in vitro by 3'-tRNase from human mitochondria. A 3'-end processing defect in this tRNA precursor could thus be responsible for mitochondrial disease.

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  • m.7445T N C reduces the efficiency of 3′-cleavage.

    “whilst the mt-tRNA Ser(UCN) m.7445T N C transition reduces the efficiency of 3′-cleavage [195].”

    From Mitochondrial DNA mutations and human disease (2010) · cites this paper as [195]

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Authors
Levinger, L.
Affiliations
York College, City University of New York (US)
Corresponding author
Levinger, L.
Venue
Nucleic Acids Research
Published
2001-11-01
Volume
29
Issue
21
Pages
4334-4340
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2115054680
Cited by
60
References
37
Citations by year
2024: 1 · 2020: 1 · 2018: 1 · 2017: 4 · 2016: 1 · 2015: 3 · 2014: 1 · 2013: 4 · 2012: 5
FWCI
1.63
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (9904589)
  • International Business Machines Corporation
  • Boston College
  • University of Pennsylvania
  • State University of New York
  • Pennsylvania State University
  • National Institutes of Health (1r15gm057617-01)
  • Medical Research Council
  • National Institute of General Medical Sciences (S06GM008153, T34GM08498, R15GM57617, SO6GM08153, T34GM008498)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA modifications and cancer
Keywords
non-syndromic hearing loss, mitochondrial disease
MeSH terms
RNA, Mitochondrial, Base Sequence, Cell Extracts, Deafness, Endoribonucleases, HeLa Cells, Humans, Mitochondria, Models, Genetic, Nucleic Acid Conformation, RNA, RNA Precursors, RNA, Transfer, Ser, Substrate Specificity, Templates, Genetic, RNA, Catalytic, Point Mutation, RNA 3' End Processing, Mitochondrial Diseases, Ribonuclease P

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