Cited by 124RNA and protein synthesis mechanismsRNA modifications and cancerMitochondrial Function and Pathology

Defect in modification at the anticodon wobble nucleotide of mitochondrial tRNALys with the MERRF encephalomyopathy pathogenic mutation

Yasukawa, Takehiro, Suzuki, Tsutomu, Ishii, Norie, Ueda, Takuya, Ohta, Shigeo, Watanabe, Kimitsuna·2000·FEBS Letters

Abstract

A mitochondrial tRNA(Lys) gene mutation at nucleotide position 8344 is responsible for the myoclonus epilepsy associated with ragged-red fibers (MERRF) subgroup of mitochondrial encephalomyopathies. Here, we show that normally modified uridine at the anticodon wobble position remains unmodified in the purified mutant tRNA(Lys). We have reported a similar modification defect at the same position in two mutant mitochondrial tRNAs(Leu)(UUR) in another subgroup, mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS), indicating this defect is common in the two kinds of tRNA molecules with the respective mutations of the two major mitochondrial encephalomyopathies. We therefore suggest the defect in the anticodon is responsible, through the translational process, for the pathogenesis of mitochondrial diseases.

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Crossref · 10.1016/s0014-5793(00)01145-5

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  • Posttranscriptional modifications of mt-tRNA Lys m.8344A N G mutant mt-tRNAs are dependent on nuclear background.

    “Similarly, posttranscriptional modifications of mt-tRNA Lys m.8344A N G mutant mt-tRNAs are also dependent on nuclear background [196,198].”

    From Mitochondrial DNA mutations and human disease (2010) · cites this paper as [198]

  • m.8344A N G decreases mt-tRNA stability in vitro and in cybrid osteosarcoma cells.

    “Finally, decreased mt-tRNA stability has been described with the m.8344A N G mutation both in vitro and in cybrid osteosarcoma cells [198,202].”

    From Mitochondrial DNA mutations and human disease (2010) · cites this paper as [198]

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Authors
Yasukawa, T., Suzuki, T., Ishii, N., Ueda, T., Ohta, S., & Watanabe, K.
Affiliations
  • The University of Tokyo (JP)
  • Nippon Medical School (JP)
Corresponding author
  • Ohta, Shigeo
  • Watanabe, Kimitsuna
Venue
FEBS Letters
Publisher
Wiley
Published
2000-02-07
Volume
467
Issue
2-3
Pages
175-178
ISSN
  • 0014-5793 (ISSN-L)
  • 1873-3468
OpenAlex
W1979951442
Cited by
124
References
31
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 2 · 2022: 5 · 2021: 9 · 2020: 9 · 2019: 3 · 2018: 5 · 2017: 5 · 2016: 5 · 2015: 5 · 2014: 6 · 2013: 2 · 2012: 3
FWCI
2.77
Type
journal article
Language
en
Open access
closed
Locations
  • FEBS Letters (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA modifications and cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
MERRF, mitochondrial encephalomyopathy, MELAS, translation (biology)
MeSH terms
Anticodon, Cell Line, HeLa Cells, Humans, Mitochondria, Mutation, RNA, Transfer, Leu, RNA, Transfer, Lys, Uridine, Mitochondrial Myopathies, MELAS Syndrome, MERRF Syndrome, Point Mutation

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