Related Experiment Video

Updated: Aug 24, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53
14:57

Yeast As a Chassis for Developing Functional Assays to Study Human P53

Published on: August 4, 2019

To die or not to die: how does p53 decide?

Elizabeth A Slee1, Daniel J O'Connor, Xin Lu

  • 1Imperial College School of Medicine at St Mary's, Ludwig Institute for Cancer Research, Norfolk Place, London W2 1PG, UK.

Oncogene
|April 13, 2004
PubMed

Insights

The tumor suppressor p53

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The p53 tumor suppressor is a critical target in cancer research due to frequent mutations.
  • Apoptosis induction is a conserved and vital function of p53 in tumor suppression.
  • p53's role in apoptosis is complex, involving gene-dependent and independent pathways.

Purpose of the Study:

  • To explore the conserved mechanisms of p53-mediated apoptosis.
  • To understand how p53 activity is regulated by cellular context and stress.
  • To investigate novel protein interactions influencing p53's apoptotic function.

Main Methods:

  • Comparative analysis of p53 in primitive organisms (C. elegans, Drosophila).
  • Studies using transgenic mouse models.
  • Identification and characterization of p53-interacting proteins.

Main Results:

  • Apoptosis induction by p53 is a highly conserved function across species.
  • p53-mediated apoptosis involves multiple pathways, amplified by genotoxic stress.
  • Cellular context and stress type modulate p53 activity.
  • Interactions with specific proteins provide mechanistic insights into p53-induced apoptosis.

Conclusions:

  • Understanding p53's pro-apoptotic mechanisms is key to cancer therapy.
  • Reactivating or reintroducing p53 function in tumors is a therapeutic goal.
  • Further research into p53 regulation and interactions can yield novel cancer treatments.

More Related Videos

Purification of Ubiquitinated p53 Proteins from Mammalian Cells10:55

Purification of Ubiquitinated p53 Proteins from Mammalian Cells

Published on: March 21, 2022

Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence04:56

Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence

Published on: December 30, 2025

Related Concept Videos

DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
Molecular Factors Affecting Cell Division01:27

Molecular Factors Affecting Cell Division

Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...