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Cooperative Allosteric Transitions

Cooperative Allosteric Transitions

Cooperative Allosteric Transitions

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...

Cooperative Allosteric Transitions

Cooperative Allosteric Transitions

Allosteric Proteins-ATCase

Allosteric Proteins-ATCase

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...

Allosteric Regulation

Allosteric Regulation

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...

Ligand Binding and Linkage

Ligand Binding and Linkage

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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Related Experiment Video

Updated: Jan 4, 2026

Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence

Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence

Published on: April 27, 2018

Engineering Allostery into Proteins.

Scott D Gorman¹, Rebecca N D'Amico¹, Dennis S Winston¹

¹Department of Chemistry, The Pennsylvania State University, University Park, PA, USA.

Advances in Experimental Medicine and Biology

|November 11, 2019

Summary

This summary is machine-generated.

Scientists are engineering proteins with controllable functions using stimuli like light or pH. This chapter details methods for creating allosterically regulated proteins for medical and biotech applications.

Keywords:

Allostery Amino acid network Covalent modification Domain insertion Energy landscape Protein engineering Protein regulation

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Published on: February 3, 2022

Area of Science:

Biochemistry
Molecular Biology
Protein Engineering

Background:

Protein engineering capabilities have advanced significantly.
Developing proteins with stimulus-responsive functions is the next frontier.
Understanding allosteric regulation is crucial for designing controllable proteins.

Purpose of the Study:

To review diverse methods for engineering allosterically regulated proteins.
To showcase examples of proteins with functions controllable by external stimuli.
To highlight practical applications of engineered proteins in medicine and biotechnology.

Main Methods:

Insertion of regulatory domains into host proteins.
Covalent attachment of photoswitches for light-responsive proteins.
Targeted amino acid residue modifications to alter allosteric signaling.

Main Results:

Demonstrated successful engineering of proteins with regulated functions.
Showcased methods applicable to ligand binding, pH changes, and light.
Highlighted practical utility in medical and biotechnology fields.

Conclusions:

Advanced protein design now includes creating stimulus-responsive proteins.
Various engineering strategies enable precise control over protein function.
Engineered allosteric proteins offer significant potential for diverse applications.