Biology:DIO2

Short description: Protein-coding gene in the species Homo sapiens

Generic protein structure example

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

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.

Interactions

DIO2 has been shown to interact with USP33.

See also

• Deiodinase

Further reading

• "Pretranslational regulation of type 2 deiodinase". Thyroid 15 (8): 855–864. 2006. doi:10.1089/thy.2005.15.855. PMID 16131328. 
• Andersson B; Wentland MA; Ricafrente JY et al. (1996). "A "double adaptor" method for improved shotgun library construction". Anal. Biochem. 236 (1): 107–113. doi:10.1006/abio.1996.0138. PMID 8619474. 
• "Type 2 iodothyronine deiodinase is highly expressed in human thyroid". J. Clin. Invest. 98 (4): 962–968. 1996. doi:10.1172/JCI118880. PMID 8770868. 
• Yu W; Andersson B; Worley KC et al. (1997). "Large-scale concatenation cDNA sequencing". Genome Res. 7 (4): 353–8. doi:10.1101/gr.7.4.353. PMID 9110174. 
• "The 3'-untranslated region of human type 2 iodothyronine deiodinase mRNA contains a functional selenocysteine insertion sequence element". J. Biol. Chem. 273 (50): 33374–33378. 1999. doi:10.1074/jbc.273.50.33374. PMID 9837913. 
• Bartha T; Kim SW; Salvatore D et al. (2000). "Characterization of the 5'-flanking and 5'-untranslated regions of the cyclic adenosine 3',5'-monophosphate-responsive human type 2 iodothyronine deiodinase gene". Endocrinology 141 (1): 229–237. doi:10.1210/en.141.1.229. PMID 10614643. 
• Baqui MM; Gereben B; Harney JW et al. (2000). "Distinct subcellular localization of transiently expressed types 1 and 2 iodothyronine deiodinases as determined by immunofluorescence confocal microscopy". Endocrinology 141 (11): 4309–4312. doi:10.1210/endo.141.11.7872. PMID 11089566. 
• "Identification of two novel splicing variants of human type II iodothyronine deiodinase mRNA". Mol. Cell. Endocrinol. 172 (1–2): 169–175. 2001. doi:10.1016/S0303-7207(00)00368-3. PMID 11165050. 
• Imai Y; Toyoda N; Maeda A et al. (2002). "Type 2 iodothyronine deiodinase expression is upregulated by the protein kinase A-dependent pathway and is downregulated by the protein kinase C-dependent pathway in cultured human thyroid cells". Thyroid 11 (10): 899–907. doi:10.1089/105072501753210957. PMID 11716036. 
• "Inhibition of type 2,5'-deiodinase by tumor necrosis factor alpha, interleukin-6 and interferon gamma in human thyroid tissue". Immunol. Lett. 80 (1): 3–7. 2002. doi:10.1016/S0165-2478(01)00301-7. PMID 11716958. 
• "Substitution of cysteine for a conserved alanine residue in the catalytic center of type II iodothyronine deiodinase alters interaction with reducing cofactor". Endocrinology 143 (4): 1190–1198. 2002. doi:10.1210/en.143.4.1190. PMID 11897672. 
• "The mRNA structure has potent regulatory effects on type 2 iodothyronine deiodinase expression". Mol. Endocrinol. 16 (7): 1667–1679. 2003. doi:10.1210/mend.16.7.0879. PMID 12089359. 
• "Expression of 5'-deiodinase enzymes in normal pituitaries and in various human pituitary adenomas". Eur. J. Endocrinol. 147 (2): 263–268. 2002. doi:10.1530/eje.0.1470263. PMID 12153750. 
• Botero D; Gereben B; Goncalves C et al. (2003). "Ubc6p and ubc7p are required for normal and substrate-induced endoplasmic reticulum-associated degradation of the human selenoprotein type 2 iodothyronine monodeiodinase". Mol. Endocrinol. 16 (9): 1999–2007. doi:10.1210/me.2002-0135. PMID 12198238. 
• Strausberg RL; Feingold EA; Grouse LH et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–16903. doi:10.1073/pnas.242603899. PMID 12477932. Bibcode: 2002PNAS...9916899M. 
• Curcio-Morelli C; Gereben B; Zavacki AM et al. (2003). "In vivo dimerization of types 1, 2, and 3 iodothyronine selenodeiodinases". Endocrinology 144 (3): 937–946. doi:10.1210/en.2002-220960. PMID 12586771. 
• Ambroziak M; Pachucki J; Chojnowski K et al. (2003). "Pax-8 expression correlates with type II 5' deiodinase expression in thyroids from patients with Graves' disease". Thyroid 13 (2): 141–148. doi:10.1089/105072503321319440. PMID 12699588. 
• Dentice M; Morisco C; Vitale M et al. (2004). "The different cardiac expression of the type 2 iodothyronine deiodinase gene between human and rat is related to the differential response of the Dio2 genes to Nkx-2.5 and GATA-4 transcription factors". Mol. Endocrinol. 17 (8): 1508–1521. doi:10.1210/me.2002-0348. PMID 12775767.