polyglutamine disorders

polyglutamine disorders
polyQ disorders any of the triplet repeat disorders in which a CAG triplet repeat sequence is expanded, yielding a large polyglutamine tract in the protein product. Although the affected protein differs, all have a toxic gain of function, the abnormal protein interfering with the normal protein, and causing damage to specific populations of neurons and neurotoxicity, with clinical onset in adulthood. Called also polyglutamine diseases.

Medical dictionary. 2011.

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