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Timeless protection of telomeres
Journal article   Open access   Peer reviewed

Timeless protection of telomeres

Mariana C Gadaleta, Alberto González-Medina and Eishi Noguchi
Current genetics, v 62(4), pp 725-730
Nov 2016
PMID: 27068713
url
https://doi.org/10.1007/s00294-016-0599-xView
Published, Version of Record (VoR) Open

Abstract

Recombinases - metabolism Chromosomal Proteins, Non-Histone - metabolism Genomics DNA Replication Telomere Homeostasis Recombination, Genetic Protein Binding Repetitive Sequences, Nucleic Acid Recombinases - antagonists & inhibitors Telomerase - metabolism Telomere - metabolism DNA Damage DNA-Directed DNA Polymerase - metabolism Genome Carrier Proteins Telomere - genetics
The DNA replication machinery encounters problems at numerous genomic regions that are inherently difficult to replicate. These genomic regions include telomeres, which contain repetitive DNA and telomere-binding proteins. If not properly regulated, replication of such genomic regions can result in DNA damage, leading to genomic instability. Studies implicated a role of Timeless-related proteins at difficult-to-replicate genomic regions, including telomeres. However, how these proteins maintain telomeres was elusive. In a recent report, we described the role of Swi1, a Timeless-related protein, in telomere maintenance in fission yeast. We demonstrated that Swi1 is required for proper replication of repeat DNA sequences at telomeres. We also showed that Swi1-deficient cells utilize recombination-based ALT (alternative lengthening of telomeres)-like mechanisms to maintain telomeres in the absence of telomerase. Here, we highlight these findings and present additional data to discuss the role of Swi1 in telomere protection and ALT prevention.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Genetics & Heredity
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