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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...
Interactions Between Signaling Pathways01:19

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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...
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Protein-protein Interfaces02:04

Protein-protein Interfaces

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

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Published on: August 4, 2019

Targeting protein-protein interactions: lessons from p53/MDM2.

Justin K Murray1, Samuel H Gellman

  • 1Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI 53706, USA.

Biopolymers
|April 12, 2007
PubMed
Summary

Inhibiting protein-protein interactions is challenging. Novel strategies like proteomimetics are explored to target the p53/MDM2 interaction, offering new therapeutic avenues.

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Area of Science:

  • Medicinal Chemistry
  • Molecular Biology
  • Drug Discovery

Background:

  • Protein-protein interactions (PPIs) are crucial in cellular processes.
  • Inhibiting therapeutically relevant PPIs presents a significant challenge.
  • The p53-MDM2 interaction is a key target for cancer therapy.

Purpose of the Study:

  • To review traditional and nontraditional strategies for inhibiting the p53-MDM2 interaction.
  • To focus on oligomer-based proteomimetic approaches.
  • To compare these with other p53 pathway reactivation strategies.

Main Methods:

  • Review of literature on proteomimetic scaffolds.
  • Analysis of various unnatural oligomers (e.g., peptoids, beta-peptides).
  • Comparison with traditional small molecule inhibitors and pathway reactivation methods.

Main Results:

  • Oligomer-based strategies, including proteomimetics, are actively explored for p53-MDM2 inhibition.
  • Diverse unnatural oligomers have been designed to mimic protein recognition surfaces.
  • Traditional small molecule inhibitors and other pathway reactivation methods also show promise.

Conclusions:

  • The p53-MDM2 system serves as a model for developing inhibitors of PPIs.
  • Proteomimetic scaffolds offer a promising avenue for targeting challenging PPIs.
  • An emerging dichotomy in PPI targeting strategies is noted.