Cited by 884Mitochondrial Function and PathologyDNA Repair MechanismsGenomics and Rare Diseases

Human mitochondrial DNA deletions associated with mutations in the gene encoding twinkle, a phage T7 gene 4-like protein localized in mitochondria

Spelbrink, Johannes N., Li, Fang-Yuan, Tiranti, Valeria, Nikali, Kaisu, Yuan, Qiu-Ping, Tariq, Muhammed, Wanrooij, Sjoerd, Garrido, Nuria +13 more·2001·Nature Genetics

Abstract

The gene products involved in mammalian mitochondrial DNA (mtDNA) maintenance and organization remain largely unknown. We report here a novel mitochondrial protein, Twinkle, with structural similarity to phage T7 gene 4 primase/helicase and other hexameric ring helicases. Twinkle colocalizes with mtDNA in mitochondrial nucleoids. Screening of the gene encoding Twinkle in individuals with autosomal dominant progressive external ophthalmoplegia (adPEO), associated with multiple mtDNA deletions, identified 11 different coding-region mutations co-segregating with the disorder in 12 adPEO pedigrees of various ethnic origins. The mutations cluster in a region of the protein proposed to be involved in subunit interactions. The function of Twinkle is inferred to be critical for lifetime maintenance of human mtDNA integrity.

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Crossref · 10.1038/90058

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Authors
Spelbrink, J. N., Li, F.-Y., Tiranti, V., Nikali, K., Yuan, Q.-P., Tariq, M., Wanrooij, S., Garrido, N., Comi, G., Morandi, L., Santoro, L., Toscano, A., Fabrizi, G.-M., Somer, H., Croxen, R., Beeson, D., Poulton, J., Suomalainen, A., Jacobs, H. T., Zeviani, M., & Larsson, C.
Affiliations
  • Tampere University Hospital (FI)
  • Karolinska University Hospital (SE)
  • Fondazione IRCCS Istituto Neurologico Carlo Besta (IT)
  • Pakistan Institute of Medical Sciences (PK)
  • University of Milan (IT)
  • University of Naples Federico II (IT)
  • University of Verona (IT)
  • University of Helsinki (FI)
  • John Radcliffe Hospital (GB)
  • Montreal Neurological Institute and Hospital (CA)
Corresponding author
Spelbrink, Johannes N.
Venue
Nature Genetics
Published
2001-07
Volume
28
Issue
3
Pages
223-231
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W1551996591
Cited by
882
References
48
Citations by year
2026: 13 · 2025: 17 · 2024: 25 · 2023: 22 · 2022: 28 · 2021: 19 · 2020: 35 · 2019: 29 · 2018: 21 · 2017: 25 · 2016: 40 · 2015: 36 · 2014: 43 · 2013: 48 · 2012: 42
FWCI
16.33
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
Keywords
mitochondrial DNA deletions, chronic progressive external ophthalmoplegia, mtDNA maintenance, mitochondrial nucleoids, protein mutations, co-segregation, mitochondrial DNA integrity
MeSH terms
Amino Acid Sequence, Cell Compartmentation, Chromosomes, Human, Pair 10, DNA Helicases, DNA, Mitochondrial, Female, Finland, Heterozygote, Humans, Italy, Genetic Linkage, Male, Molecular Sequence Data, Mutation, Pakistan, Pedigree, Protein Conformation, Ophthalmoplegia, Chronic Progressive External, Sequence Deletion, Sequence Homology, Amino Acid, DNA Primase, Protein Transport, Mitochondrial Proteins

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