Ku circles the telomere?
نویسندگان
چکیده
منابع مشابه
Ku circles the telomere?
all tumor cells are created equal when it comes to telomere biology. Tumor cells that do not express telomerase appear to utilize a telomerase-independent process to maintain telomere length, known as ALT for alternative lengthening of telomeres [1]. Although the existence of this process has been recognized for some time, the precise mechanism by which telomeres are maintained in these cells h...
متن کاملThe effect of Ku on telomere replication time is mediated by telomere length but is independent of histone tail acetylation
DNA replication in Saccharomyces cerevisiae proceeds according to a temporal program. We have investigated the role of the telomere-binding Ku complex in specifying late replication of telomere-proximal sequences. Genome-wide analysis shows that regions extending up to 80 kb from telomeres replicate abnormally early in a yku70 mutant. We find that Ku does not appear to regulate replication time...
متن کاملThe yeast Ku heterodimer is essential for protection of the telomere against nucleolytic and recombinational activities
The Ku heterodimer, conserved in a wide range of eukaryotes, plays a multiplicity of roles in yeast. First, binding of Ku, which is composed of a 70 kDa (Hdf1p) and an 80 kDa (Hdf2p) subunit [1-3], to double-strand breaks promotes non-homologous end-to-end joining of DNA [3]. Second, Ku appears to participate in DNA replication, regulating both the number of rounds of replication permissible wi...
متن کاملTor Complex 1 Controls Telomere Length by Affecting the Level of Ku
Telomeres are specialized DNA-protein structures at the ends of eukaryotic chromosomes. Telomeric DNA is synthesized by telomerase, which is expressed only at the early stages of development [1, 2]. To become malignant, any cell has to be able to replenish telomeres [3]. Thus, understanding how telomere length is monitored has significant medical implications, especially in the fields of aging ...
متن کاملKu complex controls the replication time of DNA in telomere regions.
We have investigated whether the Ku complex is involved in regulating DNA replication in the yeast Saccharomyces cerevisiae. We find that Ku proteins control the replication time of telomeric regions; replication origins located close to telomeres or within subtelomeric repeat sequences normally initiate late, but are activated much earlier in mutants lacking Ku function. In contrast, origins d...
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ژورنال
عنوان ژورنال: Aging
سال: 2011
ISSN: 1945-4589
DOI: 10.18632/aging.100321