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Related Concept Videos

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...
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
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Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
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...
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.

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

Published on: August 4, 2019

New insights into p53 activation.

Christopher L Brooks1, Wei Gu

  • 1Stemline Therapeutics, Inc., Suite 34-L, New York, NY 10128, USA. cbrooks@stemline.com

Cell Research
|April 21, 2010
PubMed
Summary
This summary is machine-generated.

The tumor suppressor p53, a key factor in DNA damage response, balances cell fate decisions. Understanding its activation mechanisms, like antirepression, offers new cancer therapy targets.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • The tumor suppressor p53 is a critical transcriptional factor responding to DNA damage and cellular stress.
  • p53's role in directing cells towards growth arrest or apoptosis is not fully understood.
  • The balance of cell-fate determination by p53 is influenced by the type and severity of cellular damage.

Purpose of the Study:

  • To elucidate the mechanisms underlying p53's role in cell-fate decisions following DNA damage.
  • To explore the concept of antirepression as a physiological mechanism for p53 activation.
  • To identify novel chemotherapeutic targets for reactivating wild-type p53 in tumors.

Main Methods:

  • The study discusses existing evidence and proposes theoretical mechanisms.
  • Focuses on the concept of antirepression and its implications.
  • Integrates findings on p53 regulation and function.

Main Results:

  • Evidence suggests p53's in vivo functions mediate cell-fate choices based on damage.
  • The concept of antirepression provides a potential explanation for p53 activation.
  • Inhibitory factors of p53 present potential therapeutic targets.

Conclusions:

  • Understanding p53's regulatory mechanisms, including antirepression, is crucial for comprehending cell-fate decisions.
  • Reactivation of p53 in tumors with wild-type p53 holds promise for cancer therapy.
  • Targeting factors that inhibit p53 could be a novel chemotherapeutic strategy.