Deficiency of pyrroline-5-carboxylate reductase
Type II hyperprolinemia
Type of disease: Rare conditions
Hyperprolinemia type 2 results in an excess of a particular protein building block (amino acid), called proline, in the blood. This condition generally occurs when proline is not broken down properly by the body. Hyperprolinemia type 2 causes proline levels in the blood to be 10 to 15 times higher than normal, and it also causes high levels of a related compound called pyrroline-5-carboxylate. Some people with this condition develop mild mental retardation and seizures; however, the symptoms of this disorder vary in severity among affected individuals. Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.