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Biosemiotics

, Volume 1, Issue 2, pp 191–206 | Cite as

The Viral Origins of Telomeres and Telomerases and their Important Role in Eukaryogenesis and Genome Maintenance

  • Guenther Witzany
Article

Abstract

Whereas telomeres protect terminal ends of linear chromosomes, telomerases identify natural chromosome ends, which differ from broken DNA and replicate telomeres. Although telomeres play a crucial role in the linear chromosome organization of eukaryotic cells, their molecular syntax most probably descended from an ancient retroviral competence. This indicates an early retroviral colonization of large double-stranded DNA viruses, which are putative ancestors of the eukaryotic nucleus. This contribution demonstrates an advantage of the biosemiotic approach towards our evolutionary understanding of telomeres, telomerases, other reverse transcriptases and mobile elements. Their role in genetic/genomic content organization and maintenance is no longer viewed as an object of randomly derived alterations (mutations) but as a highly sophisticated hierarchy of regulatory networks organized and coordinated by natural genome-editing competences of viruses.

Keywords

Telomeres Telomerases Eukaryotic nucleus Persistent viruses 

Notes

Acknowledgements

This work was first presented at the Cold Spring Harbor Laboratory Meeting on ‘Telomeres and Telomerases’, 3–6 May 2007. I would like to thank Cold Spring Harbor Laboratory for the invitation and participation support.

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Authors and Affiliations

  1. 1.Telos–Philosophische PraxisBürmoosAustria

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