Cited by 459Telomeres, Telomerase, and SenescenceDNA and Nucleic Acid ChemistryGenetics, Aging, and Longevity in Model Organisms

POT1-interacting protein PIP1: a telomere length regulator that recruits POT1 to the TIN2/TRF1 complex

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Ye, Jeffrey Zheng-Sheng, Hockemeyer, Dirk, Krutchinsky, Andrew N., Loayza, Diego, Hooper, Sarah M., Chait, Brian T., de Lange, Titia·2004·Genes & Development

Abstract

Human telomere length is controlled by a negative feedback loop based on the binding of TRF1 to double-stranded telomeric DNA. The TRF1 complex recruits POT1, a single-stranded telomeric DNA-binding protein necessary for cis-inhibition of telomerase. By mass spectrometry, we have identified a new telomeric protein, which we have named POT1-interacting protein 1 (PIP1). PIP1 bound both POT1 and the TRF1-interacting factor TIN2 and could tether POT1 to the TRF1 complex. Reduction of PIP1 or POT1 levels with shRNAs led to telomere elongation, indicating that PIP1 contributes to telomere length control through recruitment of POT1.

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  • TIN2 interacts with the TPP1-POT1 subcomplex that binds the single-stranded overhang.

    “TRF1-interacting nuclear factor 2 also interacts with the subcomplex of shelterin that binds the single-stranded overhang-TPP1 and POT1, two oligonucleotide/ oligosaccharide binding (OB)-fold containing proteins (13)(14)(15).”

    From Telomeres and telomerase in cancer (2010) · cites this paper as [14]

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  1. Liu, D., Safari, A., O'Conner, M.S., Chan, D.W., Laegeler, A., Qin, L., and Songyang, Z. 2004. PTOP is a novel POT1 interacting protein that regulates POT1 telomeric localization. Nat. Cell Biol. (in press).

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Authors
Ye, J. Z.-S., Hockemeyer, D., Krutchinsky, A. N., Loayza, D., Hooper, S. M., Chait, B. T., & de Lange, T.
Affiliations
Memorial Sloan Kettering Cancer Center (US)
Venue
Genes & Development
Published
2004-07-01
Volume
18
Issue
14
Pages
1649-1654
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2155983703
Cited by
459
References
21
Citations by year
2026: 4 · 2025: 7 · 2024: 15 · 2023: 18 · 2022: 6 · 2021: 21 · 2020: 12 · 2019: 15 · 2018: 15 · 2017: 16 · 2016: 30 · 2015: 21 · 2014: 34 · 2013: 17 · 2012: 24
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (RR00862)
  • National Cancer Institute (K08 CA93604, K08CA093604, T32 CA09673-26A1, T32CA009673)
  • National Center for Research Resources (RR00862, P41RR000862)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
PIP1, POT1, TIN2, TRF1, telomere length regulation, telomeric proteins, telomerase inhibition, telomere elongation, protein-protein interaction, telomeric DNA
MeSH terms
Shelterin Complex, Carrier Proteins, Cloning, Molecular, Fluorescent Antibody Technique, HeLa Cells, Humans, Mass Spectrometry, Telomere, Two-Hybrid System Techniques, Telomere-Binding Proteins, RNA Interference, Telomeric Repeat Binding Protein 1, Intracellular Signaling Peptides and Proteins

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