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.
journal_name
PLoS Genetjournal_title
PLoS geneticsauthors
Meier B,Clejan I,Liu Y,Lowden M,Gartner A,Hodgkin J,Ahmed Sdoi
10.1371/journal.pgen.0020018keywords:
subject
Has Abstractpub_date
2006-02-01 00:00:00pages
e18issue
2eissn
1553-7390issn
1553-7404journal_volume
2pub_type
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