Related Experiment Video

Updated: May 3, 2026

Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence
04:56

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

Published on: December 30, 2025

371

p53 regulation by TRP2 is not pervasive in melanoma

Roland Houben1, Corinna P Schmid1, Melissa Maier1

  • 1Department of Dermatology, Venereology and Allergology, University Hospital Würzburg, Würzburg, Germany.

Plos One
|January 30, 2014
PubMed

Insights

Tyrosinase related protein 2 (TRP2) does not suppress the p53 pathway in melanoma, contrary to recent proposals. This study found no correlation between TRP2 and p53 expression in melanoma tissues or cell lines.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • The p53 protein is a crucial tumor suppressor, and its inhibition is vital for cancer development.
  • While p53 mutations are common in many cancers, they are infrequent in melanoma.
  • Tyrosinase related protein 2 (TRP2) has been suggested to suppress the p53 pathway in melanoma.

Purpose of the Study:

  • To investigate the proposed role of TRP2 as a suppressor of the p53 pathway in melanoma.
  • To determine if TRP2 expression levels correlate with p53 activity in melanoma.
  • To assess the impact of TRP2 modulation on p53 expression and activity.

Main Methods:

  • Immunohistochemistry was used to analyze p53 and TRP2 expression in 172 melanoma tissue samples.
  • TRP2 knockdown was performed using three different shRNAs in five melanoma cell lines.
  • Ectopic expression of TRP2 was conducted in a TRP2-negative melanoma cell line.

Main Results:

  • No correlation was found between p53 and TRP2 expression in melanoma tissues.
  • TRP2 knockdown did not affect p53 expression or reporter gene activity in melanoma cell lines.
  • Ectopic TRP2 expression did not alter p53 levels in a TRP2-negative melanoma cell line.

Conclusions:

  • The data suggest that p53 repression controlled by TRP2 is not a general mechanism in melanoma.
  • TRP2 does not appear to play a significant role in suppressing the p53 pathway in this cancer type.
  • Further research is needed to understand the regulation of the p53 pathway in melanoma.

More Related Videos

Yeast As a Chassis for Developing Functional Assays to Study Human P5314:57

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

Published on: August 4, 2019

8.9K
Purification of Ubiquitinated p53 Proteins from Mammalian Cells10:55

Purification of Ubiquitinated p53 Proteins from Mammalian Cells

Published on: March 21, 2022

2.6K

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...
4.0K
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.
32.1K
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...
6.2K
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....
8.2K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
3.6K
Interactions Between Signaling Pathways01:19

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...
4.7K