Premium
Role of heterochromatin in suppressing subtelomeric recombination in fission yeast
Author(s) -
Bisht Kamlesh Kumar,
Arora Sumit,
Ahmed Shakil,
Singh Jagmohan
Publication year - 2008
Publication title -
yeast
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.923
H-Index - 102
eISSN - 1097-0061
pISSN - 0749-503X
DOI - 10.1002/yea.1603
Subject(s) - heterochromatin , biology , subtelomere , heterochromatin protein 1 , telomere , genetics , schizosaccharomyces pombe , schizosaccharomyces , flp frt recombination , centromere , dna , chromatin , saccharomyces cerevisiae , genetic recombination , recombination , yeast , gene , chromosome
Telomere length is regulated by a complex interplay of several factors, including telomerase, telomere‐binding proteins, DNA replication machinery and recombination. In yeast, DNA polymerase α is required for de novo synthesis of telomeres from broken ends of DNA, and it also suppresses the elongation of normal telomeric repeats. Heterochromatin proteins Clr1–Clr4 and Swi6 and DNA polα organize heterochromatin structure at mating type, centromere, rDNA and telomere regions that are refractory to transcription and recombination in Schizosaccharomyces pombe . Here, we have addressed the role of heterochromatin structure in regulating the integrity and organization of telomeric regions. Here, we show that subtelomeric duplication and rearrangements occur in polα and heterochromatin mutants and find that some of the putative duplication events are dependent on the Rad50 pathway. Thus, our study shows a role of heterochromatin in maintaining the integrity of the subtelomeric regions by suppressing their recombination in Sz. pombe . Copyright © 2008 John Wiley & Sons, Ltd.