TIN2 Binds TRF1 and TRF2 Simultaneously and Stabilizes the TRF2 Complex on Telomeres
نویسندگان
چکیده
منابع مشابه
TIN2 binds TRF1 and TRF2 simultaneously and stabilizes the TRF2 complex on telomeres.
Human telomeres contain two related telomeric DNA-binding proteins, TRF1 and TRF2. The TRF1 complex contains the TRF1 interacting partner, TIN2, as well as PIP1 and POT1 and regulates telomere-length homeostasis. The TRF2 complex is primarily involved in telomere protection and contains the TRF2 interacting partner human (h)Rap1 as well as several factors involved in the DNA damage response. A ...
متن کاملTRF2-tethered TIN2 can mediate telomere protection by TPP1/POT1.
The shelterin protein TIN2 is required for the telomeric accumulation of TPP1/POT1 heterodimers and for the protection of telomeres by the POT1 proteins (POT1a and POT1b in the mouse). TIN2 also binds to TRF1 and TRF2, improving the telomeric localization of TRF2 and its function. Here, we ask whether TIN2 needs to interact with both TRF1 and TRF2 to mediate the telomere protection afforded by ...
متن کاملA shared docking motif in TRF1 and TRF2 used for differential recruitment of telomeric proteins.
Mammalian telomeres are protected by a six-protein complex: shelterin. Shelterin contains two closely related proteins (TRF1 and TRF2), which recruit various proteins to telomeres. We dissect the interactions of TRF1 and TRF2 with their shared binding partner (TIN2) and other shelterin accessory factors. TRF1 recognizes TIN2 using a conserved molecular surface in its TRF homology (TRFH) domain....
متن کاملA Dynamic Molecular Link between the Telomere Length Regulator TRF1 and the Chromosome End Protector TRF2
BACKGROUND Human telomeres are coated by the telomere repeat binding proteins TRF1 and TRF2, which are believed to function independently to regulate telomere length and protect chromosome ends, respectively. RESULTS Here, we show that TRF1 and TRF2 are linked via TIN2, a previously identified TRF1-interacting protein, and its novel binding partner TINT1. TINT1 localized to telomeres via TIN2...
متن کاملTRF1 and TRF2 binding to telomeres is modulated by nucleosomal organization
The ends of eukaryotic chromosomes need to be protected from the activation of a DNA damage response that leads the cell to replicative senescence or apoptosis. In mammals, protection is accomplished by a six-factor complex named shelterin, which organizes the terminal TTAGGG repeats in a still ill-defined structure, the telomere. The stable interaction of shelterin with telomeres mainly depend...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 2004
ISSN: 0021-9258
DOI: 10.1074/jbc.m409047200