Iodotyrosine deiodinase
（重定向自IYD）
![Structure of human iodotyrosine deiodinase generated from PDB entry 4TTB.[12]](/Images/godic/202501/21/Protein_structure_of_human_iodotyrosine_deiodinase_1040.png")
![Iodotyrosine deiodinase reaction scheme.[4]](/Images/godic/202501/21/Iodotyrosine_deiodinase_reaction_21040.png")
![Diiodotyrosine (DIT).](/Images/godic/202501/21/Diiodotyrosine1040.png")
![Monoiodotyrosine (MIT).](/Images/godic/202501/21/Monoiodotyrosine1040.png")
Iodotyrosine deiodinase, also known as iodotyrosine dehalogenase 1, is a type of deiodinase enzyme that scavenges iodide by removing it from iodinated tyrosine residues in the thyroid gland. These iodinated tyrosines are produced during thyroid hormone biosynthesis. The iodide that is scavenged by iodotyrosine deiodinase is necessary to again synthesize the thyroid hormones. After synthesis, the thyroid hormones circulate through the body to regulate metabolic rate, protein expression, and body temperature. Iodotyrosine deiodinase is thus necessary to keep levels of both iodide and thyroid hormones in balance.