Dystonia, Dopa-Responsive, also known as dopa-responsive dystonia, is related to dystonia, dopa-responsive, due to sepiapterin reductase deficiency and hyperphenylalaninemia, bh4-deficient, a, and has symptoms including torticollis, dystonia, diurnal and gait ataxia. An important gene associated with Dystonia, Dopa-Responsive is GCH1 (GTP Cyclohydrolase 1), and among its related pathways/superpathways are Monoamine transport and Metabolism of cofactors. The drugs Dopamine and Dopamine Agents have been mentioned in the context of this disorder. Affiliated tissues include brain and subthalamic nucleus, and related phenotypes are depression and ataxia