July 7, 2019  |  

TERRA promotes telomerase-mediated telomere elongation in Schizosaccharomyces pombe.

Authors: Moravec, Martin and Wischnewski, Harry and Bah, Amadou and Hu, Yan and Liu, Na and Lafranchi, Lorenzo and King, Megan C and Azzalin, Claus M

Telomerase-mediated telomere elongation provides cell populations with the ability to proliferate indefinitely. Telomerase is capable of recognizing and extending the shortest telomeres in cells; nevertheless, how this mechanism is executed remains unclear. Here, we show that, in the fission yeast Schizosaccharomyces pombe, shortened telomeres are highly transcribed into the evolutionarily conserved long noncoding RNA TERRA A fraction of TERRA produced upon telomere shortening is polyadenylated and largely devoid of telomeric repeats, and furthermore, telomerase physically interacts with this polyadenylated TERRA in vivo We also show that experimentally enhanced transcription of a manipulated telomere promotes its association with telomerase and concomitant elongation. Our data represent the first direct evidence that TERRA stimulates telomerase recruitment and activity at chromosome ends in an organism with human-like telomeres. © 2016 The Authors.

Journal: EMBO reports
DOI: 10.15252/embr.201541708
Year: 2016

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