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Related Concept Videos

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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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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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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...
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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
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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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Related Experiment Video

Updated: Apr 28, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53
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p53 regulation orchestrates the TGF-beta response.

Stefano Piccolo1

  • 1Department of Medical Biotechnologies, Section of Histology and Embryology, University of Padua, viale Colombo 3, 35126 Padua, Italy. piccolo@bio.unipd.it

Cell
|May 31, 2008
PubMed
Summary

A newly identified protein, XFDL156, inhibits p53 and maintains ectodermal cell pluripotency during embryonic development by blocking TGF-beta signaling pathways.

Area of Science:

  • Developmental biology
  • Cell biology
  • Molecular biology

Background:

  • The tumor suppressor protein p53 plays a key role in regulating cellular responses to transforming growth factor-beta (TGF-beta).
  • Understanding the intricate network of p53 interactions is crucial for deciphering developmental processes.

Discussion:

  • Sasai et al. (2008) identified XFDL156 as a novel protein that inhibits p53 activity.
  • XFDL156 is expressed in the ectoderm germ layer during embryonic development.
  • This protein's function is to maintain the pluripotency of ectodermal cells.

Key Insights:

  • XFDL156 acts by inhibiting specific TGF-beta target genes.
  • These inhibited genes are normally involved in promoting mesoderm specification.
  • Therefore, XFDL156 prevents ectodermal cells from differentiating into mesoderm.

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Outlook:

  • Further research into XFDL156 could reveal new therapeutic targets for developmental disorders.
  • Investigating the precise molecular mechanisms of XFDL156-p53 interaction is warranted.
  • Exploring the role of XFDL156 in other developmental contexts may uncover broader biological significance.