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Entrez GeneID

GeneBank Accession#

Protein Accession#

Gene Name

DIO3

Gene Alias

5DIII, D3, DIOIII, TXDI3

Gene Description

deiodinase, iodothyronine, type III

Omim ID

Gene Ontology

Gene Summary

The protein encoded by this intronless gene belongs to the iodothyronine deiodinase family. It catalyzes the inactivation of thyroid hormone by inner ring deiodination of the prohormone thyroxine (T4) and the bioactive hormone 3,3',5-triiodothyronine (T3) to inactive metabolites, 3,3',5'-triiodothyronine (RT3) and 3,3'-diiodothyronine (T2), respectively. This enzyme is highly expressed in the pregnant uterus, placenta, fetal and neonatal tissues, suggesting that it plays an essential role in the regulation of thyroid hormone inactivation during embryological development. This protein contains a selenocysteine (Sec) residue, which is essential for efficient enzyme activity. The selenocysteine is encoded by the UGA codon, which normally signals translation termination. The 3' UTR of Sec-containing genes have a common stem-loop structure, the sec insertion sequence (SECIS), which is necessary for the recognition of UGA as a Sec codon rather than as a stop signal. [provided by RefSeq

Other Designations

iodothyronine deiodinase, placental type|thyroxine deiodinase type III (selenoprotein)|type 3 iodothyronine selenodeiodinase|type-III 5' deiodinase