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Title: Structural and functional analysis of the human POT1-TPP1 telomeric complex

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms14928· OSTI ID:1361138
 [1];  [2];  [2];  [2];  [3];  [2];  [4];  [2];  [1]
  1. The Wistar Inst., Philadelphia, PA (United States); Univ. of Pennsylvania, Philadelphia, PA (United States). Perelman School of Medicine. Dept. of Biochemistry and Biophysics
  2. The Wistar Inst., Philadelphia, PA (United States)
  3. Cardiff Univ. (United Kingdom). School of Medicine. Division of Cancer and Genetics
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource

POT1 and TPP1 are part of the shelterin complex and are essential for telomere length regulation and maintenance. Naturally occurring mutations of the telomeric POT1–TPP1 complex are implicated in familial glioma, melanoma and chronic lymphocytic leukaemia. Here we report the atomic structure of the interacting portion of the human telomeric POT1–TPP1 complex and suggest how several of these mutations contribute to malignant cancer. The POT1 C-terminus (POT1C) forms a bilobal structure consisting of an OB-fold and a holiday junction resolvase domain. TPP1 consists of several loops and helices involved in extensive interactions with POT1C. Biochemical data shows that several of the cancer-associated mutations, partially disrupt the POT1–TPP1 complex, which affects its ability to bind telomeric DNA efficiently. A defective POT1–TPP1 complex leads to longer and fragile telomeres, which in turn promotes genomic instability and cancer.

Research Organization:
The Wistar Inst., Philadelphia, PA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; National Inst. of Health (NIH) (United States); Wistar Cancer Center (United States)
Contributing Organization:
Cardiff Univ. (United Kingdom); Univ. of Pennsylvania, Philadelphia, PA (United States)
Grant/Contract Number:
AC02-76SF00515; AC02-05CH11231; P41GM103393; R01 GM088332; R01 CA201312; P30 CA10815
OSTI ID:
1361138
Journal Information:
Nature Communications, Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 69 works
Citation information provided by
Web of Science

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Cited By (19)

Genetic predisposition for multiple myeloma journal January 2020
Human telomere repeat binding factor TRF1 replaces TRF2 bound to shelterin core hub TIN2 when TPP1 is absent posted_content October 2018
Human POT1 Prevents Severe Telomere Instability Induced by Homology Directed DNA Repair posted_content January 2020
Investigation of deleterious effects of nsSNPs in the POT1 gene: a structural genomics‐based approach to understand the mechanism of cancer development journal December 2018
Identification of multiple risk loci and regulatory mechanisms influencing susceptibility to multiple myeloma journal September 2018
Balance between senescence and apoptosis is regulated by telomere damage–induced association between p16 and caspase-3 journal May 2018
Structural biology of telomeres and telomerase journal November 2019
Protection of telomeres 1 proteins POT1a and POT1b can repress ATR signaling by RPA exclusion, but binding to CST limits ATR repression by POT1b journal August 2018
Structural and functional analyses of the mammalian TIN2-TPP1-TRF2 telomeric complex journal November 2017
Functional Analysis of Human Hub Proteins and Their Interactors Involved in the Intrinsic Disorder-Enriched Interactions journal December 2017
Genetic correlation between multiple myeloma and chronic lymphocytic leukaemia provides evidence for shared aetiology journal December 2018
Seryl tRNA synthetase cooperates with POT1 to regulate telomere length and cellular senescence journal November 2019
An update on the biology and management of dyskeratosis congenita and related telomere biology disorders journal September 2019
Human Telomere Repeat Binding Factor TRF1 Replaces TRF2 Bound to Shelterin Core Hub TIN2 when TPP1 Is Absent journal August 2019
Identification of multiple risk loci and regulatory mechanisms influencing susceptibility to multiple myeloma. text January 2018
Genetic variation in POT1 and risk of thyroid subsequent malignant neoplasm: A report from the Childhood Cancer Survivor Study journal February 2020
Structural Features of Nucleoprotein CST/Shelterin Complex Involved in the Telomere Maintenance and Its Association with Disease Mutations journal February 2020
Quantitative Biology of Human Shelterin and Telomerase: Searching for the Weakest Point journal June 2019
Telomere Maintenance in Pediatric Cancer journal November 2019

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