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- W1841489266 abstract "The transcriptional intermediary factor 1 (TIF1) family protein TIF1βis a corepressor for Krüppel-associated box (KRAB)-domain-containing zinc finger proteins and plays a critical role in early embryogenesis. Here, we examined TIF1β distribution in the nucleus of mouse embryonic carcinoma F9 cells during retinoic-acid-induced primitive endodermal differentiation. Using confocal immunofluorescence microscopy, we show that, although TIF1β is diffusely distributed throughout the nucleoplasm of undifferentiated cells, it relocates and concentrates into distinct foci of centromeric heterochromatin in differentiated cells characterized by a low proliferation rate and a well developed cytokeratin network. This relocation was not observed in isoleucine-deprived cells, which are growth arrested, or in compound RXRα-/-/RARγ-/- null mutant cells, which are resistant to RA-induced differentiation. Amino-acid substitutions in the PxVxL motif of TIF1β, which abolish interaction with members of the heterochromatin protein 1 (HP1) family, prevent its centromeric localization in differentiated cells. Collectively, these data provide compelling evidence for a dynamic nuclear compartmentalization of TIF1βthat is regulated during cell differentiation through a mechanism that requires HP1 interaction." @default.
- W1841489266 created "2016-06-24" @default.
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- W1841489266 date "2002-09-01" @default.
- W1841489266 modified "2023-10-06" @default.
- W1841489266 title "Cell differentiation induces TIF1β association with centromeric heterochromatin via an HP1 interaction" @default.
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- W1841489266 doi "https://doi.org/10.1242/jcs.115.17.3439" @default.
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