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- W1970921172 abstract "Whereas mammalian cells harbor two double strand telomeric repeat binding factors, TRF1 and TRF2, the fission yeast Schizosaccharomyces pombe has been thought to harbor solely the TRF1/TRF2 ortholog Taz1p to perform comparable functions. Here we report the identification of telomeric repeat binding factor 1 (Tbf1), a second TRF1/TRF2 ortholog in S. pombe. Like the Taz1p, the identified Tbf1p shares amino acid sequence similarity, as well as structural and functional characteristics, with the mammalian TRF1 and TRF2 proteins. This family of proteins shares a common architecture with two separate structural domains. An N-terminal domain is necessary and sufficient for the formation of homodimers, and a C-terminal MYB/homeodomain mediates sequence specific recognition of double-stranded telomeric DNA. The identified Tbf1p binds S. pombe telomeric DNA with high sequence specificity in vitro. Targeted deletion of the tbf1 gene reveals that it is essential for survival, and overexpression of the tbf1 gene leads to telomere elongation in vivo, which is dependent upon the MYB domain. These data suggest that fission yeast, like mammals, have two factors that bind double-stranded telomeric DNA and perform distinct roles in telomere length regulation." @default.
- W1970921172 created "2016-06-24" @default.
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- W1970921172 date "2008-02-01" @default.
- W1970921172 modified "2023-10-09" @default.
- W1970921172 title "Identification and Characterization of an Essential Telomeric Repeat Binding Factor in Fission Yeast" @default.
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- W1970921172 doi "https://doi.org/10.1074/jbc.m708784200" @default.
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