P53 Gene
P53 Gene - 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.
12:55
Using the Gene Pulser MXcell Electroporation System to Transfect Primary Cells with High Efficiency
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Cited by 11 •
2010
This procedure shows how to use the Gene Pulser MXcell electroporation system to rapidly and easily identify the best electroporation conditions for mouse embryonic fibroblasts (MEFs) or other primary cells. Considerations for troubleshooting are also discussed in the associated video.
FAQs
p53 signaling tailors the cellular response to the severity and persistence of stress. After DNA damage or oncogene activation, p53 can activate regulatory genes that temporarily stop cell-cycle progression and allow repair. If the damage cannot be resolved, the response can shift toward senescence or apoptosis, limiting the chance that a compromised cell will continue dividing.
Loss-of-function mutations in TP53 weaken several protective checkpoints at once rather than affecting only one repair pathway. Cells with impaired signaling may fail to pause proliferation, preserve damaged DNA, or eliminate irreparably injured cells. This helps explain why TP53 disruption is strongly associated with cancer biology: abnormal cells gain opportunities to survive and expand.
Senescence and apoptosis represent different endpoints of the p53 response. Senescence places a cell into a persistent state in which it no longer proceeds through normal proliferation, whereas apoptosis eliminates a cell when damage is irreparable. Both outcomes restrict the expansion of abnormal cells, but they do so through distinct forms of cellular control.
Binding to regulatory DNA allows p53 to control the activity of genes that coordinate cell-cycle arrest, DNA repair, senescence, and apoptosis. This regulatory position lets one stress-responsive protein organize several protective programs rather than acting through a single cellular process. The result is a coordinated barrier against continued proliferation after cellular damage.
Examining TP53 status can connect a tumor's molecular features with clinically relevant questions. The overview identifies uses in cancer diagnosis and prognosis, so researchers may study whether p53 pathway disruption helps characterize disease or anticipate its behavior. This application links a gene-level alteration to broader efforts to understand and evaluate cancer.
Drug-development research uses knowledge of p53 signaling to examine cancer-associated pathway disruption. Investigators can relate defects in stress responses to the survival and proliferation of abnormal cells, then use that biological understanding to guide therapeutic research. In this context, p53 connects molecular mechanisms of tumor suppression with efforts to develop cancer treatments.
In biology, p53 provides a framework for studying how cells respond when their genetic material or growth-control systems become threatened. By coordinating repair, cell-cycle pausing, senescence, or apoptosis, its pathway shows how cells limit the persistence of damaged states. Research on these responses therefore connects gene regulation with the maintenance of genomic stability.