Related Experiment Video

Updated: Aug 25, 2025

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

9.6K

Variable Regions of p53 Isoforms Allosterically Hard Code DNA Interaction

Isabel Armour-Garb, In Sub Mark Han, Benjamin S Cowan

    The Journal of Physical Chemistry. B
    |October 17, 2022
    PubMed

    Insights

    The tumor suppressor protein p53

    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Structural Biology

    Background:

    • Allosteric regulation is crucial for protein activity, often described as life's "second secret."
    • The tumor suppressor protein p53 plays a vital role in cellular processes.
    • Understanding p53's allosteric regulation is key to developing cancer treatments.

    Purpose of the Study:

    • To investigate the allosteric regulation and mutant reactivation of the tumor suppressor protein p53.
    • To explore how splice variant isoforms of p53 modulate interactions with DNA.
    • To expand the understanding of allosteric effectors and binding sites in protein-DNA interactions.

    Main Methods:

    • Utilized molecular dynamics (MD) simulations.
    • Applied novel MD sectors and MD-Markov state models.
    • Analyzed nine naturally occurring p53 splice variant isoforms.

    Main Results:

    • All p53 isoforms exhibited distinct dynamic properties compared to wild-type p53.
    • Isoforms demonstrated altered interactions with consensus DNA.
    • Variable regions of p53 isoforms act as allosteric regulators of DNA binding.

    Conclusions:

    • The study provides novel insights into the allosteric regulation of p53 by its isoforms.
    • Findings suggest potential therapeutic strategies targeting p53 allostery for cancer treatment.
    • Generalizing allosteric effector and binding site definitions aids in understanding protein activity modulation.

    More Related Videos

    High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy06:38

    High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy

    Published on: February 7, 2019

    8.8K
    Author Spotlight: A Computational Approach to Decipher Amino Acid Preferences in Multispecific Protein-Protein Interactions06:50

    Author Spotlight: A Computational Approach to Decipher Amino Acid Preferences in Multispecific Protein-Protein Interactions

    Published on: January 26, 2024

    2.0K

    Related Concept Videos

    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....
    6.9K
    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...
    4.6K
    Conserved Binding Sites01:49

    Conserved Binding Sites

    Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
    Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
    4.3K
    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.
    35.6K
    Cooperative Binding of Transcription Regulators02:13

    Cooperative Binding of Transcription Regulators

    Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
    6.5K
    Cis-regulatory Sequences02:02

    Cis-regulatory Sequences

    Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
    10.0K