Blog
About

14
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      A human telomerase holoenzyme protein required for Cajal body localization and telomere synthesis.

      Science (New York, N.Y.)

      Cell Cycle Proteins, Amino Acid Sequence, metabolism, Cell Line, Tumor, Coiled Bodies, HeLa Cells, Humans, Immunoprecipitation, Molecular Sequence Data, Nuclear Proteins, RNA, RNA Interference, Telomerase, chemistry, Telomere

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Telomerase is a ribonucleoprotein (RNP) complex that synthesizes telomere repeats in tissue progenitor cells and cancer cells. Active human telomerase consists of at least three principal subunits, including the telomerase reverse transcriptase, the telomerase RNA (TERC), and dyskerin. Here, we identify a holoenzyme subunit, TCAB1 (telomerase Cajal body protein 1), that is notably enriched in Cajal bodies, nuclear sites of RNP processing that are important for telomerase function. TCAB1 associates with active telomerase enzyme, established telomerase components, and small Cajal body RNAs that are involved in modifying splicing RNAs. Depletion of TCAB1 by using RNA interference prevents TERC from associating with Cajal bodies, disrupts telomerase-telomere association, and abrogates telomere synthesis by telomerase. Thus, TCAB1 controls telomerase trafficking and is required for telomere synthesis in human cancer cells.

          Related collections

          Author and article information

          Journal
          19179534
          2728071
          10.1126/science.1165357

          Comments

          Comment on this article