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Melanocortin-3-receptor promoter polymorphism associated with tuberculosis susceptibility does not influence protein expression.


ABSTRACT: BACKGROUND: The melanocortin-3-receptor (MC3R) is a member of the G-protein coupled receptor family that mediate cellular response through the cyclic adenosine monophosphate signalling pathway. In the promoter region of MC3R the polymorphism rs6127698 has previously been shown to be strongly associated with tuberculosis susceptibility. It is predicted to generate an alternative transcription factor binding site. FINDINGS: We investigated the functional impact of rs6127698 by luciferase assay to assess if this polymorphism is capable of altering protein expression. Our results did not show any significant protein expression changes when comparing the two alleles of rs6127698. CONCLUSIONS: Our experiments demonstrate that the rs6127698 polymorphism does not influence protein translation. A functional role of the predicted alternative transcription factor binding site could therefore not be confirmed. These results suggest rs6127698 has no direct role in tuberculosis susceptibility. The possibility remains that this polymorphism is linked to an adjacent functional genetic variant, acting as a surrogate marker for disease risk.

SUBMITTER: Eggert M 

PROVIDER: S-EPMC3605127 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Melanocortin-3-receptor promoter polymorphism associated with tuberculosis susceptibility does not influence protein expression.

Eggert Marlene M   Pfob Martina M   Steinlein Ortrud K OK  

BMC research notes 20130315


<h4>Background</h4>The melanocortin-3-receptor (MC3R) is a member of the G-protein coupled receptor family that mediate cellular response through the cyclic adenosine monophosphate signalling pathway. In the promoter region of MC3R the polymorphism rs6127698 has previously been shown to be strongly associated with tuberculosis susceptibility. It is predicted to generate an alternative transcription factor binding site.<h4>Findings</h4>We investigated the functional impact of rs6127698 by lucifer  ...[more]

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