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LARP7-like protein Pof8 regulates telomerase assembly and poly(A)+TERRA expression in fission yeast

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  • Amanda K. Mennie

    (University of Illinois at Chicago)

  • Bettina A. Moser

    (University of Illinois at Chicago)

  • Toru M. Nakamura

    (University of Illinois at Chicago)

Abstract

Telomerase is a reverse transcriptase complex that ensures stable maintenance of linear eukaryotic chromosome ends by overcoming the end replication problem, posed by the inability of replicative DNA polymerases to fully replicate linear DNA. The catalytic subunit TERT must be assembled properly with its telomerase RNA for telomerase to function, and studies in Tetrahymena have established that p65, a La-related protein 7 (LARP7) family protein, utilizes its C-terminal xRRM domain to promote assembly of the telomerase ribonucleoprotein (RNP) complex. However, LARP7-dependent telomerase complex assembly has been considered as unique to ciliates that utilize RNA polymerase III to transcribe telomerase RNA. Here we show evidence that fission yeast Schizosaccharomyces pombe utilizes the p65-related protein Pof8 and its xRRM domain to promote assembly of RNA polymerase II-encoded telomerase RNA with TERT. Furthermore, we show that Pof8 contributes to repression of the transcription of noncoding RNAs at telomeres.

Suggested Citation

  • Amanda K. Mennie & Bettina A. Moser & Toru M. Nakamura, 2018. "LARP7-like protein Pof8 regulates telomerase assembly and poly(A)+TERRA expression in fission yeast," Nature Communications, Nature, vol. 9(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-02874-0
    DOI: 10.1038/s41467-018-02874-0
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    Cited by:

    1. Jennifer Porat & Moaine El Baidouri & Jorg Grigull & Jean-Marc Deragon & Mark A. Bayfield, 2022. "The methyl phosphate capping enzyme Bmc1/Bin3 is a stable component of the fission yeast telomerase holoenzyme," Nature Communications, Nature, vol. 13(1), pages 1-14, December.
    2. Diego J. Páez-Moscoso & David V. Ho & Lili Pan & Katie Hildebrand & Kristi L. Jensen & Michaella J. Levy & Laurence Florens & Peter Baumann, 2022. "A putative cap binding protein and the methyl phosphate capping enzyme Bin3/MePCE function in telomerase biogenesis," Nature Communications, Nature, vol. 13(1), pages 1-16, December.

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