P53 Localization
P53 Localization - Related Videos
04:56
Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence
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2025
Hs578T breast cancer cells harboring the p53 V157F mutation exhibit significantly higher Thioflavin T fluorescence compared to MCF7 cells, indicating enhanced protein aggregation. Multipoint fluorescence measurements improve detection accuracy and reliability in identifying β-sheet-rich aggregates, underscoring the importance of aggregation-prone p53 mutations in cancer research and the development of therapeutic strategies.
10:55
Purification of Ubiquitinated p53 Proteins from Mammalian Cells
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Cited by 1 •
2022
The protocol describes a step-by-step method to purify ubiquitinated proteins from mammalian cells using the p53 tumor suppressor protein as an example. Ubiquitinated p53 proteins were purified from cells under stringent nondenaturing and denaturing conditions.
17:59
Derivation of Thymic Lymphoma T-cell Lines from Atm-/- and p53-/- Mice
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Cited by 11 •
2011
In this video we demonstrate a protocol to establish mouse thymic lymphoma cell lines. By following this protocol, we have successfully established several T-cell lines from Atm-/- and p53-/- mice with thymic lymphoma.
14:57
Yeast As a Chassis for Developing Functional Assays to Study Human P53
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Cited by 16 •
2019
Presented here are four protocols to construct and exploit yeast Saccharomyces cerevisiae reporter strains to study human P53 transactivation potential, impacts of its various cancer-associated mutations, co-expressed interacting proteins, and the effects of specific small molecules.
13:13
Nano-fEM: Protein Localization Using Photo-activated Localization Microscopy and Electron Microscopy
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Cited by 14 •
2012
We describe a method to localize fluorescently tagged proteins in electron micrographs. Fluorescence is first localized using photo-activated localization microscopy on ultrathin sections. These images are then aligned to electron micrographs of the same section.
FAQs
MDM2 acts as a key negative regulator of p53. By controlling p53 stability, it can promote export from the nucleus and support degradation. This links p53 distribution to the cell’s ability to retain an active stress response. When stress stabilizes p53, nuclear accumulation can support regulation of genes associated with cell-cycle arrest, DNA repair, or apoptosis.
Nuclear accumulation places p53 where it can activate genes that coordinate major cellular outcomes. These include stopping the cell cycle, supporting DNA repair, or initiating apoptosis when damage or stress requires removal of the affected cell. Consequently, localization is not merely a visual feature; it helps connect stress detection with the biological decision made by the cell.
Cytoplasmic retention can limit p53’s nuclear activity, reducing its ability to activate genes involved in cell-cycle arrest, DNA repair, or apoptosis. This creates a possible gap between the presence of p53 and its functional tumor-suppressive effects. Examining this abnormal distribution therefore helps disease research investigate how altered compartmental behavior may contribute to impaired cellular protection.
Fluorescence microscopy, cell fractionation, and immunostaining provide complementary approaches for examining p53 distribution between cellular compartments. Together, these methods can help determine whether p53 is predominantly nuclear, cytoplasmic, or redistributed after stress. Using localization measurements alongside the experimental condition supports characterization of cellular stress responses and strengthens interpretation in cancer biology studies.
Fluorescence microscopy can show where p53 is distributed within cells and whether its compartmental pattern changes under different conditions. Comparing unstressed and stressed samples can help identify increased nuclear accumulation or abnormal cytoplasmic retention. These observations provide visual evidence for connecting p53 distribution with downstream cellular responses such as cell-cycle arrest, DNA repair, or apoptosis.
Localization analysis helps researchers assess whether p53 is positioned to perform its tumor-suppressive functions. A pattern of nuclear accumulation may be consistent with activation of stress-response genes, whereas cytoplasmic retention or impaired nuclear activity may indicate weakened protection. Measurements from microscopy, fractionation, or immunostaining can therefore support studies of abnormal stress responses and disease mechanisms.