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PLoS Genet. 2006 Feb;2(2):e18. Epub 2006 Feb 10.

trt-1 is the Caenorhabditis elegans catalytic subunit of telomerase.

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1
Department of Genetics, University of North Carolina, Chapel Hill, North Carolina, USA.

Abstract

Mutants of trt-1, the Caenorhabditis elegans telomerase reverse transcriptase, reproduce normally for several generations but eventually become sterile as a consequence of telomere erosion and end-to-end chromosome fusions. Telomere erosion and uncapping do not cause an increase in apoptosis in the germlines of trt-1 mutants. Instead, late-generation trt-1 mutants display chromosome segregation defects that are likely to be the direct cause of sterility. trt-1 functions in the same telomere replication pathway as mrt-2, a component of the Rad9/Rad1/Hus1 (9-1-1) proliferating cell nuclear antigen-like sliding clamp. Thus, the 9-1-1 complex may be required for telomerase to act at chromosome ends in C. elegans. Although telomere erosion limits replicative life span in human somatic cells, neither trt-1 nor telomere shortening affects postmitotic aging in C. elegans. These findings illustrate effects of telomere dysfunction in C. elegans mutants lacking the catalytic subunit of telomerase, trt-1.

PMID:
16477310
PMCID:
PMC1361356
DOI:
10.1371/journal.pgen.0020018
[Indexed for MEDLINE]
Free PMC Article
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