| Primary Identifier | IPR027252 | Type | Family |
| Short Name | Iodothyronine_deiodinase_I/III |
| description | Iodothyronine deiodinase () (DI) []is the vertebrate enzyme responsible for the deiodination ofthe prohormone thyroxine (T4 or 3,5,3',5'-tetraiodothyronine) into the biologically active hormone T3 (3,5,3'-triiodothyronine) and of T3 into the inactive metabolite T2 (3,3'-diiodothyronine). All known DI are proteins of about 250 residues that contain a selenocysteine at their active site. Three types of DI are known, type I is commonly found in the liver and kidney [], type II is essential for providing the brain with the appropriate levels of T3 during the critical period of development, and type III (also known as thyroxine 5-deiodinase) is essential for the regulation of thyroid hormone inactivation during embryological development.This entry represents type I and III Iodothyronine deiodinases. |
