SGD Paper Help



Grandin N and Charbonneau M  (2009) Telomerase- and Rad52-independent immortalization of budding yeast by an inherited-long-telomere pathway of telomeric repeat amplification. Mol Cell Biol 29(4):965-85

Abstract: In the absence of telomerase, telomeres erode, provoking accumulation of DNA damage and death by senescence. Rare survivors arise, however, due to Rad52-based amplification of telomeric sequences by homologous recombination. The present study reveals that, in budding yeast cells, post-senescence survival relying on amplification of the TG1-3 telomeric repeats can take place in the absence of Rad52 when overelongated telomeres are present during senescence (hence its designation ILT, for Inherited-Long-Telomere, pathway). By growth competition, the Rad52-independent pathway was almost as efficient as the Rad51-, Rad52-dependent pathway that predominates in telomerase-negative cells. The ILT pathway could also be triggered by increased telomerase accessibility before telomerase removal, combined with loss of telomere protection, indicating that prior accumulation of recombination proteins was not required. The ILT pathway was dependent on Rad50 and Mre11 but not the RAD51 recombinase and Rad59, thus making it distinct from both the type II (budding yeast ALT) and type I pathways amplifying the TG1-3 repeats and subtelomeric sequences, respectively. The ILT pathway also required the Rad1 endonuclease and Elg1, an RFC-like complex subunit, but not Rad24 or Ctf18 (two subunits of two other RFC-like complexes), the DNL4 ligase, Yku70 or Nej1. Possible mechanisms for this Rad52-independent pathway of telomeric repeats amplification are discussed. Effects of inherited long telomeres on Rad52-dependent recombination are also reported.

Status: Published Type: Journal Article PubMed ID: 19047370

Topics addressed in this paper

Number of different genes curated to this paper: 15

Jump to Summary Chart for:

  • To find other papers on a gene and topic, click on the colored ball in the appropriate box.
  • displays other papers with information about that topic for that gene.
  • displays other papers in SGD that are associated with that topic.
    The topic is addressed in these papers but does not describe a specific gene or chromosomal feature.
  • To go to the Locus page for a gene, click on the gene name.
Topics Genes linked to topics (#1 - 10 )
CTF18 DNL4 ELG1 MRE11 NEJ1 RAD1 RAD24 RAD50 RAD51 RAD52
Additional Literature blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Genetic Interactions blue ball blue ball blue ball blue ball blue ball
Mutants/Phenotypes blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Primary Literature blue ball
Protein Sequence Features blue ball
Strains/Constructs blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball

Topics Genes linked to topics (#11 - 15 )
RAD59 RFA1 STN1 TLC1 YKU70
Additional Literature blue ball blue ball blue ball blue ball blue ball
Genetic Interactions blue ball blue ball blue ball
Mutants/Phenotypes blue ball blue ball blue ball blue ball blue ball
Strains/Constructs blue ball blue ball blue ball blue ball blue ball

Author Searches

To find contact information or other publications by the authors of this paper, follow these three steps:
  1. (1) Choose an author,
  2. (2) Choose a search parameter,
  3. (3) Click to implement