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Related Concept Videos

Allosteric Regulation01:08

Allosteric Regulation

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Allosteric regulation of enzymes occurs when the binding of an effector molecule to a site that is different from the active site causes a change in the enzymatic activity. This alternate site is called an allosteric site, and an enzyme can contain more than one of these sites. Allosteric regulation can either be positive or negative, resulting in an increase or decrease in enzyme activity. Most enzymes that display allosteric regulation are metabolic enzymes involved in the degradation or...
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Cooperative Allosteric Transitions01:58

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Allosteric Proteins-ATCase01:19

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Binding sites linkages can regulate a protein's function.  For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to  N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
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Ligand Binding and Linkage00:49

Ligand Binding and Linkage

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Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked.  In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
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Amplifying Signals via Enzymatic Cascade01:22

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When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
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Feedback Inhibition00:46

Feedback Inhibition

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Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
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Updated: May 29, 2025

Use of Label-free Optical Biosensors to Detect Modulation of Potassium Channels by G-protein Coupled Receptors
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AllohubPy: Detecting Allosteric Signals Through An Information-theoretic Approach.

Oriol Gracia Carmona1, Jens Kleinjung2, Dimitrios Anastasiou3

  • 1Department of Structural and Molecular Biology, Division of Biosciences and Institute of Structural and Molecular Biology, University College London, London WC1E 6BT, United Kingdom; Department of Biological Sciences Birkbeck, University of London, London WC1E 7HX, United Kingdom; Randall Centre for Cell & Molecular Biosciences, King's College London, London SE1 1UL, United Kingdom.

Journal of Molecular Biology
|February 3, 2025
PubMed
Summary
This summary is machine-generated.

AllohubPy, a new Python tool, enhances the study of allosteric regulation by analyzing molecular dynamics simulations. It improves the detection of dynamic allosteric motions and residue pathways for better biological understanding.

Keywords:
allosteric hubsallosteryinformation theorymolecular dynamicsmutual information

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Area of Science:

  • Biophysics
  • Computational Biology
  • Structural Biology

Background:

  • Allosteric regulation is vital for biological processes but not fully understood.
  • Existing methods like AlloHubMat and GSAtools use information theory and graph analysis.
  • These methods simplify complex molecular dynamics data using Structural Alphabets.

Purpose of the Study:

  • To present AllohubPy, an improved and standardized Python-based methodology for studying allosteric regulation.
  • To analyze AllohubPy's performance, limitations, and sampling requirements.
  • To expand the methodology with new Structural Alphabets and Protein Language Models.

Main Methods:

  • Developed AllohubPy, a Python package based on AlloHubMat and GSAtools.
  • Utilized extensive molecular dynamics simulations of allosteric systems.
  • Applied convergence analysis, diverse Structural Alphabets (e.g., 3DI), and Protein Language Models.

Main Results:

  • AllohubPy demonstrates improved reliability and ease of use for capturing dynamic allosteric motions.
  • The study analyzed performance, limitations, and sampling needs of the new tool.
  • Integration with PLMs refined allosteric hub communication detection via evolutionary constraints.

Conclusions:

  • AllohubPy enhances the study of allosteric regulation, offering a more accessible and reliable method.
  • The tool effectively captures dynamic allosteric motions and residue pathways.
  • AllohubPy is available as an open-source package on GitHub.