Cited by 358Telomeres, Telomerase, and SenescenceGenomics and Chromatin DynamicsDNA and Nucleic Acid Chemistry

TRF1 is a dimer and bends telomeric DNA

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Bianchi, Alessandro, Smith, Susan, Chong, Laura, Elias, Peter, de Lange, Titia·1997·The EMBO Journal

Abstract

TRF1 is a mammalian telomeric protein that binds to the duplex array of TTAGGG repeats at chromosome ends. TRF1 has homology to the DNA-binding domain of the Myb family of transcription factors but, unlike most Myb-related proteins, TRF1 carries one rather than multiple Myb-type DNA-binding motifs. Here we show that TRF1 binds DNA as a dimer using a large conserved domain near the N-terminus of the protein for TRF1-TRF1 interactions. Dimerization was observed both in a complex with DNA and in the yeast two-hybrid assay. TRF1 dimers were found to require both Myb repeats for the formation of a stable complex with DNA, indicating a parallel between the DNA-binding mode of TRF1 and other Myb-related proteins. TRF1 was found to have a number of biochemical similarities to Rap1p, a distantly related DNA-binding protein that functions at telomeres in yeast. Rap1p and TRF1 both require two Myb motifs for DNA binding and both factors bind along their cognate telomeric sequences without showing strong cooperative interactions between adjacent proteins. Furthermore, TRF1 was found to bend its telomeric site to an angle of -120 degrees. Since Rap1p similarly distorts telomeric DNA, we propose that DNA bending is important for the function of telomeres in yeast and mammals.

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  • TRF1 has the ability to induce bending, looping, and pairing of duplex telomeric DNA.

    “TRF1 has the ability to induce bending, looping, and pairing of duplex telomeric DNA (5, 6, 20, 21), activities that could facilitate the folding back of the telomere.”

    From Control of Human Telomere Length by TRF1 and TRF2 (2000) · cites this paper as [5]

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Research works printed but not linked: 3

  1. repeats, respectively. The products were end-labeled with [γ-32 P]ATP IRL Press at Oxford University Press, pp. 153-179.
  2. Moyzis,R.K., Buckingham,J.M., Cram,L.S., Dani,M., Deaven,L.L., Proc. Natl Acad. Sci. USA, 89, 683-687.
  3. RAP1 protein. Proc. Natl Acad. Sci. USA, 18, 2617-2623.

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Authors
Bianchi, A., Smith, S., Chong, L., Elias, P., & de Lange, T.
Affiliations
Rockefeller University (US)
Venue
The EMBO Journal
Published
1997-04-01
Volume
16
Issue
7
Pages
1785-1794
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2127440297
Cited by
358
References
67
Citations by year
2026: 5 · 2025: 4 · 2024: 11 · 2023: 10 · 2022: 6 · 2021: 16 · 2020: 3 · 2019: 13 · 2018: 5 · 2017: 14 · 2016: 8 · 2015: 9 · 2014: 17 · 2013: 12 · 2012: 13
FWCI
8.57
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • University of North Carolina at Chapel Hill
  • Medical Research Council
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
TRF1, telomeres, protein dimerization, DNA bending, TTAGGG repeats, Rap1p, telomeric DNA binding, telomere function, protein-DNA complex
MeSH terms
Shelterin Complex, Amino Acid Sequence, Animals, Base Sequence, Binding Sites, Cell Line, DNA, DNA-Binding Proteins, Mammals, Nucleic Acid Conformation, Recombinant Proteins, Repetitive Sequences, Nucleic Acid, Saccharomyces cerevisiae, Transcription Factors, Transcription, Genetic, Transfection, Protein Biosynthesis, Polymerase Chain Reaction, Telomere, Conserved Sequence, Spodoptera, Dimerization, Saccharomyces cerevisiae Proteins, Telomere-Binding Proteins, Telomeric Repeat Binding Protein 1, Macromolecular Substances

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