Cited by 350Telomeres, Telomerase, and SenescenceDNA Repair MechanismsDNA and Nucleic Acid Chemistry

RPA-like Mammalian Ctc1-Stn1-Ten1 Complex Binds to Single-Stranded DNA and Protects Telomeres Independently of the Pot1 Pathway

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Miyake, Yasuyuki, Nakamura, Mirai, Nabetani, Akira, Shimamura, Shintaro, Tamura, Miki, Yonehara, Shin, Saito, Motoki, Ishikawa, Fuyuki·2009·Molecular Cell

Abstract

Budding yeast Cdc13, Stn1, and Ten1 form the CST complex to protect telomeres from lethal DNA degradation. It remains unknown whether similar complexes are conserved in higher eukaryotes or not. Here we isolated mammalian STN1 and TEN1 homologs and CTC1 (conserved telomere maintenance component 1). The three proteins contain putative OB-fold domains and form a complex called CST, which binds to single-stranded DNA with high affinity in a sequence-independent manner. CST associates with a fraction of telomeres consistently during the cell cycle, in quiescent cells and Pot1-knockdown cells. It does not colocalize with replication foci in S phase. Significant increases in the abundance of single-stranded G-strand telomeric DNA were observed in Stn1-knockdown cells. We propose that CST is a replication protein A (RPA)-like complex that is not directly involved in conventional DNA replication at forks but plays a role in DNA metabolism frequently required by telomeres.

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Crossref · 10.1016/j.molcel.2009.08.009

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Authors
Miyake, Y., Nakamura, M., Nabetani, A., Shimamura, S., Tamura, M., Yonehara, S., Saito, M., & Ishikawa, F.
Affiliations
Kyoto University (JP)
Corresponding author
Ishikawa, Fuyuki
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2009-10
Volume
36
Issue
2
Pages
193-206
ISSN
1097-2765 (ISSN-L)
OpenAlex
W1965580483
Cited by
350
References
37
Citations by year
2026: 8 · 2025: 9 · 2024: 19 · 2023: 20 · 2022: 17 · 2021: 23 · 2020: 15 · 2019: 16 · 2018: 20 · 2017: 20 · 2016: 32 · 2015: 12 · 2014: 27 · 2013: 26 · 2012: 30
FWCI
18.77
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
Ministry of Education, Culture, Sports, Science and Technology
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
CST complex, CTC1, Stn1, Ten1, telomere protection, single-stranded DNA binding, OB-fold domain, POT1, replication protein A, telomeric DNA, DNA metabolism, telomere maintenance
MeSH terms
Shelterin Complex, Animals, Base Sequence, DNA, Single-Stranded, HeLa Cells, Humans, Molecular Sequence Data, Protein Binding, Recombinant Proteins, Telomere, Sequence Homology, Amino Acid, Protein Structure, Tertiary, Protein Transport, Telomere-Binding Proteins, Multiprotein Complexes, Mutant Proteins, Mice, Replication Protein A, Protein Multimerization

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