Heterochromatin replication goes hand in hand with telomere protection
2020
Telomeres arose from the need to stabilize natural chromosome ends, resulting in terminal chromatin structures with specific protective functions. Their constituent proteins also execute general functions within heterochromatin, mediating late replication and facilitating fork progression. Emerging insights into the mechanisms governing heterochromatin replication suggest telomeres and heterochromatin act in concert during development and aging. They also suggest a common evolutionary origin for these two chromosome regions that arose during eukaryogenesis. Emerging evidence that telomere-specific Shelterin components also play roles in DNA replication timing within heterochromatin and genome maintenance suggests a potential common evolutionary origin of their protective and regulatory functions.
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