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Related Experiment Video

Updated: Jun 21, 2026

Involving Individuals with Developmental Language Disorder and Their Parents/Carers in Research Priority Setting

Involving Individuals with Developmental Language Disorder and Their Parents/Carers in Research Priority Setting

Published on: June 6, 2020

One is not enough.

Robert Daber¹, Kim Sharp, Mitchell Lewis

¹Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, 37th and Hamilton Walk, Philadelphia, PA 19104-6059, USA.

Journal of Molecular Biology

|July 28, 2009

Summary

Researchers modified a repressor

Area of Science:

Molecular Biology
Biochemistry
Genetics

Background:

Gene expression regulation is crucial in prokaryotic and eukaryotic organisms.
The lac operon serves as a model for metabolite-mediated transcriptional control.
Metabolites act as allosteric effectors, binding repressors to shift conformational states.

Purpose of the Study:

To investigate the impact of modifying a single inducer binding site on a dimeric repressor.
To elucidate the thermodynamic parameters governing allosteric regulation in repressors.

Main Methods:

Experimental modification of a single inducer binding site in a dimeric repressor.
Analysis of the effects of these modifications on gene induction.
Calculation of thermodynamic parameters associated with allosteric function.

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Main Results:

Specific modifications to the inducer binding site altered repressor induction.
Thermodynamic parameters governing allosteric properties were successfully calculated.
These parameters quantify the influence of effector molecules on repressor function.

Conclusions:

Understanding the thermodynamic basis of allosteric regulation is key to gene expression control.
Modifying inducer binding sites provides insights into repressor allostery.
This work contributes to a deeper comprehension of molecular mechanisms in gene regulation.