Dynamic subcellular partitioning of the nucleolar transcription factor TIF-IA under ribotoxic stress
نویسندگان
چکیده
منابع مشابه
The nucleolus as a stress sensor: JNK2 inactivates the transcription factor TIF-IA and down-regulates rRNA synthesis.
Cells respond to a variety of extracellular and intracellular forms of stress by down-regulating rRNA synthesis. We have investigated the mechanism underlying stress-dependent inhibition of RNA polymerase I (Pol I) transcription and show that the Pol I-specific transcription factor TIF-IA is inactivated upon stress. Inactivation is due to phosphorylation of TIF-IA by c-Jun N-terminal kinase (JN...
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Transcription of rRNA genes is essential for maintaining nucleolar integrity, a hallmark for the healthy state and proliferation rate of a cell. Inhibition of rRNA synthesis leads to disintegration of the nucleolus, elevated levels of p53, and induction of cell suicide, identifying the nucleolus as a critical stress sensor. Whether deregulation of rRNA synthesis is causally involved in neurodeg...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Molecular Cell Research
سال: 2009
ISSN: 0167-4889
DOI: 10.1016/j.bbamcr.2009.05.004