DIO2

DIO2

DIO2

Protein-coding gene in the species Homo sapiens


Type II iodothyronine deiodinase (iodothyronine 5'-deiodinase, iodothyronine 5'-monodeiodinase) is an enzyme that in humans is encoded by the DIO2 gene.[5][6][7]

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Function

The protein encoded by this gene belongs to the iodothyronine deiodinase family. It activates thyroid hormone by converting the prohormone thyroxine (T4) by outer ring deiodination (ORD) to bioactive 3,3',5-triiodothyronine (T3). It is highly expressed in the thyroid, and may contribute significantly to the relative increase in thyroidal T3 production in patients with Graves' disease and thyroid adenomas. This protein contains selenocysteine (Sec) residues 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. Alternative splicing results in multiple transcript variants encoding different isoforms.[7]

Interactions

DIO2 has been shown to interact with USP33.[8]

See also


References

  1. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  2. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  3. Araki O, Murakami M, Morimura T, Kamiya Y, Hosoi Y, Kato Y, Mori M (Jun 1999). "Assignment of type II iodothyronine deiodinase gene (DIO2) to human chromosome band 14q24.2→q24.3 by in situ hybridization". Cytogenet Cell Genet. 84 (1–2): 73–74. doi:10.1159/000015218. PMID 10343107. S2CID 19715942.
  4. Curcio-Morelli C, Zavacki AM, Christofollete M, Gereben B, de Freitas BC, Harney JW, Li Z, Wu G, Bianco AC (July 2003). "Deubiquitination of type 2 iodothyronine deiodinase by von Hippel-Lindau protein-interacting deubiquitinating enzymes regulates thyroid hormone activation". J. Clin. Invest. 112 (2): 189–96. doi:10.1172/JCI18348. PMC 164294. PMID 12865408.

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