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One is not enough.

Abstract：

:In both prokaryotic and eukaryotic organisms, repressors and activators are responsible for regulating gene expression. The lac operon is a paradigm for understanding how metabolites function as signaling molecules and modulate transcription. These metabolites or allosteric effector molecules bind to the repressor and alter the conformational equilibrium between the induced and the repressed states. Here, we describe a set of experiments where we modified a single inducer binding site in a dimeric repressor and examined its effect on induction. Based upon these observations, we have been able to calculate the thermodynamic parameters that are responsible for the allosteric properties that govern repressor function. Understanding how effector molecules alter the thermodynamic properties of the repressor is essential for establishing a detailed understanding of gene regulation.

journal_name

J Mol Biol

journal_title

Journal of molecular biology

authors

Daber R,Sharp K,Lewis M

doi

10.1016/j.jmb.2009.07.050

subject

Has Abstract

pub_date

2009-10-09 00:00:00

pages

1133-44

issue

5

eissn

0022-2836

issn

1089-8638

pii

S0022-2836(09)00903-6

journal_volume

392

pub_type

杂志文章

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