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DIO2 iodothyronine deiodinase 2 [ Homo sapiens (human) ]

Gene ID: 1734, updated on 5-Mar-2024

Summary

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Official Symbol
DIO2provided by HGNC
Official Full Name
iodothyronine deiodinase 2provided by HGNC
Primary source
HGNC:HGNC:2884
See related
Ensembl:ENSG00000211448 MIM:601413; AllianceGenome:HGNC:2884
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
D2; 5DII; SelY; DIOII; TXDI2; SELENOY
Summary
The protein encoded by this gene belongs to the iodothyronine deiodinase family. It catalyzes the conversion of prohormone thyroxine (3,5,3',5'-tetraiodothyronine, T4) to the bioactive thyroid hormone (3,5,3'-triiodothyronine, T3) by outer ring 5'-deiodination. This gene is widely expressed, including in thyroid and brain. It is thought to be responsible for the 'local' production of T3, and thus important in influencing thyroid hormone action in these tissues. It has also been reported to be highly expressed in thyroids of patients with Graves disease, and in follicular adenomas. The intrathyroidal T4 to T3 conversion by this enzyme may contribute significantly to the relative increase in thyroidal T3 production in these patients. This protein is a selenoprotein containing the non-standard amino acid, selenocysteine (Sec), which is encoded by the UGA codon that normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, designated the Sec insertion sequence (SECIS) element, that is necessary for the recognition of UGA as a Sec codon, rather than as a stop signal. Unlike the other two members (DIO1 and DIO3) of this enzyme family, the mRNA for this gene contains an additional in-frame UGA codon that has been reported (in human) to function either as a Sec or a stop codon, which can result in two isoforms with one or two Sec residues; however, only the upstream Sec (conserved with the single Sec residue found at the active site in DIO1 and DIO3) was shown to be essential for enzyme activity (PMID:10403186). Alternatively spliced transcript variants have been described for this gene. [provided by RefSeq, Oct 2018]
Expression
Biased expression in thyroid (RPKM 69.7), endometrium (RPKM 13.6) and 2 other tissues See more
Orthologs
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Genomic context

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See DIO2 in Genome Data Viewer
Location:
14q31.1
Exon count:
7
Annotation release Status Assembly Chr Location
RS_2023_10 current GRCh38.p14 (GCF_000001405.40) 14 NC_000014.9 (80197526..80231057, complement)
RS_2023_10 current T2T-CHM13v2.0 (GCF_009914755.1) 14 NC_060938.1 (74407785..74441322, complement)
105.20220307 previous assembly GRCh37.p13 (GCF_000001405.25) 14 NC_000014.8 (80663869..80697400, complement)

Chromosome 14 - NC_000014.9Genomic Context describing neighboring genes Neighboring gene uncharacterized LOC105370591 Neighboring gene uncharacterized LOC105370593 Neighboring gene DIO2 antisense RNA 1 Neighboring gene OCT4-NANOG hESC enhancer GRCh37_chr14:80930624-80931315 Neighboring gene centrosomal protein 128 Neighboring gene Neanderthal introgressed variant-containing enhancer experimental_37660 Neighboring gene Neanderthal introgressed variant-containing enhancer experimental_37671 Neighboring gene Neanderthal introgressed variant-containing enhancer experimental_37742 Neighboring gene high mobility group nucleosomal binding domain 2 pseudogene 2 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 8818 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 8819 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 8820 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 8821 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 8822 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr14:81439163-81439664 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr14:81439665-81440164 Neighboring gene GPRASP3 pseudogene 1 Neighboring gene thyroid stimulating hormone receptor

Genomic regions, transcripts, and products

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Go to nucleotide: Graphics FASTA GenBank

Expression

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  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

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Related articles in PubMed

  1. Association between DIO2 Thr92Ala polymorphism and hypertension in patients with hypothyroidism: Korean Genome and Epidemiology Study. Kang YM, et al. Korean J Intern Med, 2023 Mar. PMID 36646987, Free PMC Article
  2. Single-cell profiling of the microenvironment in decidual tissue from women with missed abortions. Hou R, et al. Fertil Steril, 2023 Mar. PMID 36528108
  3. Type 2 deiodinase p.Thr92Ala polymorphism does not affect the severity of obesity and weight loss after bariatric surgery. Benenati N, et al. Sci Rep, 2022 Jun 23. PMID 35739305, Free PMC Article
  4. Crosstalk between CpG Methylation and Polymorphisms (CpG-SNPs) in the Promotor Region of DIO2 in Kashin-Beck Disease. Zhang RQ, et al. Chin Med Sci J, 2022 Mar 31. PMID 35256049
  5. The Type 2 Deiodinase Thr92Ala Polymorphism Is Associated with Higher Body Mass Index and Fasting Glucose Levels: A Systematic Review and Meta-Analysis. Wang X, et al. Biomed Res Int, 2021. PMID 34660805, Free PMC Article

See all (148) citations in PubMed

GeneRIFs: Gene References Into Functions

What's a GeneRIF?
  1. Effect of DIO2 Gene Polymorphism on Thyroid Hormone Levels and Its Correlation with the Severity of Schizophrenia in a Pakistani Population.
    Title: Effect of DIO2 Gene Polymorphism on Thyroid Hormone Levels and Its Correlation with the Severity of Schizophrenia in a Pakistani Population.
  2. Association of DIO2 and MCT10 Polymorphisms With Persistent Symptoms in LT4-Treated Patients in the UK Biobank.
    Title: Association of DIO2 and MCT10 Polymorphisms With Persistent Symptoms in LT4-Treated Patients in the UK Biobank.
  3. Polymorphisms within DIO2 and GADD45A genes increase the risk of liver disease progression in chronic hepatitis b carriers.
    Title: Polymorphisms within DIO2 and GADD45A genes increase the risk of liver disease progression in chronic hepatitis b carriers.
  4. Association between DIO2 Thr92Ala polymorphism and hypertension in patients with hypothyroidism: Korean Genome and Epidemiology Study.
    Title: Association between DIO2 Thr92Ala polymorphism and hypertension in patients with hypothyroidism: Korean Genome and Epidemiology Study.
  5. Single-cell profiling of the microenvironment in decidual tissue from women with missed abortions.
    Title: Single-cell profiling of the microenvironment in decidual tissue from women with missed abortions.
  6. Association between phenols and thyroid hormones: The role of iodothyronine deiodinase genes.
    Title: Association between phenols and thyroid hormones: The role of iodothyronine deiodinase genes.
  7. Type 2 deiodinase p.Thr92Ala polymorphism does not affect the severity of obesity and weight loss after bariatric surgery.
    Title: Type 2 deiodinase p.Thr92Ala polymorphism does not affect the severity of obesity and weight loss after bariatric surgery.
  8. Crosstalk between CpG Methylation and Polymorphisms (CpG-SNPs) in the Promotor Region of DIO2 in Kashin-Beck Disease.
    Title: Crosstalk between CpG Methylation and Polymorphisms (CpG-SNPs) in the Promotor Region of DIO2 in Kashin-Beck Disease.
  9. Patients with Osteoarthritis and Kashin-Beck Disease Display Distinct CpG Methylation Profiles in the DIO2, GPX3, and TXRND1 Promoter Regions.
    Title: Patients with Osteoarthritis and Kashin-Beck Disease Display Distinct CpG Methylation Profiles in the DIO2, GPX3, and TXRND1 Promoter Regions.
  10. Iodothyronine deiodinase 2 (DiO2) regulates trophoblast cell line cycle, invasion and apoptosis; and its downregulation is associated with early recurrent miscarriage.
    Title: Iodothyronine deiodinase 2 (DiO(2)) regulates trophoblast cell line cycle, invasion and apoptosis; and its downregulation is associated with early recurrent miscarriage.
Submit: New GeneRIF Correction See all GeneRIFs (122)

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

Genotypes

Pathways from PubChem

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Interactions

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Products Interactant Other Gene Complex Source Pubs Description

General gene information

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Markers

Homology

Gene Ontology Provided by GOA

Function Evidence Code Pubs
enables selenium binding IC
Inferred by Curator
more info
 PubMed 
enables thyroxine 5'-deiodinase activity IBA
Inferred from Biological aspect of Ancestor
more info
  
enables thyroxine 5'-deiodinase activity IDA
Inferred from Direct Assay
more info
 PubMed 
enables thyroxine 5'-deiodinase activity TAS
Traceable Author Statement
more info
 PubMed 
enables thyroxine 5-deiodinase activity IDA
Inferred from Direct Assay
more info
 PubMed 
enables ubiquitin protein ligase binding IPI
Inferred from Physical Interaction
more info
 PubMed 
Process Evidence Code Pubs
involved_in hormone biosynthetic process IEA
Inferred from Electronic Annotation
more info
  
involved_in positive regulation of cold-induced thermogenesis ISS
Inferred from Sequence or Structural Similarity
more info
 PubMed 
involved_in response to lipopolysaccharide IEA
Inferred from Electronic Annotation
more info
  
involved_in selenocysteine incorporation NAS
Non-traceable Author Statement
more info
 PubMed 
involved_in thyroid hormone generation TAS
Traceable Author Statement
more info
 PubMed 
involved_in thyroid hormone metabolic process IBA
Inferred from Biological aspect of Ancestor
more info
  
involved_in thyroid hormone metabolic process IDA
Inferred from Direct Assay
more info
 PubMed 
Component Evidence Code Pubs
located_in membrane IC
Inferred by Curator
more info
 PubMed 
located_in plasma membrane TAS
Traceable Author Statement
more info
  

General protein information

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Preferred Names
type II iodothyronine deiodinase
Names
deiodinase, iodothyronine type II
deiodinase-2
deiodonase-2
selenoprotein Y
thyroxine deiodinase, type II
type 2 DI
type 2 iodothyronine deiodinase
type-II 5'-deiodinase
type-II 5'deiodinase
NP_000784.3
NP_001311391.2
NP_001353425.1
NP_054644.1

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

  1. NM_000793.6 → NP_000784.3  type II iodothyronine deiodinase isoform b

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) uses a different promoter and contains two novel 5' non-coding exons; thus, has a longer 5' UTR compared to the variant 1. Variants 1 (NM_001366496.1), 2 and 3 represent the same one-Sec containing isoform (b), considered to be the canonical form.
    Source sequence(s)
    AC007372, AF093774, AK292210, BC136514
    Related
    ENSP00000451419.1, ENST00000557010.5

  2. NM_001324462.2 → NP_001311391.2  type II iodothyronine deiodinase isoform b

    Status: REVIEWED

    Description
    Transcript Variant: This variant (3) uses a different promoter and contains a novel 5' non-coding exon; thus, has a longer 5' UTR compared to variant 1. Variants 1 (NM_001366496.1), 2 and 3 represent the same one-Sec containing isoform (b), considered to be the canonical form.
    Source sequence(s)
    AC007372, AF093774, BC136514, CD701270, JK546617

  3. NM_001366496.1 → NP_001353425.1  type II iodothyronine deiodinase isoform b

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1, also known as hDII-a) represents the predominant transcript and encodes two isoforms resulting from the use of alternative in-frame translation termination codons. The shorter isoform (b) with one Sec residue results from translation termination at the second UGA codon, while the longer isoform (a) with two Sec residues results from translation termination at an in-frame downstream UAA stop codon. This RefSeq represents the shorter isoform (b), which is considered the canonical form as the protein extension past the second UGA codon is not conserved in orthologs from other vertebrate species. Variants 2 and 3 also represent isoform b.
    Source sequence(s)
    AC007372, AF093774, BC136514

  4. NM_013989.5 → NP_054644.1  type II iodothyronine deiodinase isoform a

    See identical proteins and their annotated locations for NP_054644.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1, also known as hDII-a) represents the predominant transcript and encodes two isoforms resulting from the use of alternative in-frame translation termination codons. The shorter isoform (b) with one Sec residue results from translation termination at the second UGA codon, while the longer isoform (a) with two Sec residues results from translation termination at an in-frame downstream UAA stop codon. This RefSeq represents the longer isoform (a).
    Source sequence(s)
    AC007372, AF093774, BC136514
    Consensus CDS
    CCDS45146.1
    UniProtKB/Swiss-Prot
    B9EGK0, G3V315, Q6B0A3, Q92813, Q9HCP7, Q9HCP8, Q9P1W4, Q9UDZ1
    Related
    ENSP00000405854.5, ENST00000438257.9
    Conserved Domains (1) summary
    pfam00837
    Location:4 → 262
    T4_deiodinase; Iodothyronine deiodinase

RNA

  1. NR_158990.1 RNA Sequence

    Status: REVIEWED

    Description
    Transcript Variant: This variant (4, also known as hDII-b) contains an internal novel exon compared to variant 1. This variant is represented as non-coding because the use of the 5'-most translational start codon, as used in variant 1, renders this transcript a candidate for nonsense-mediated mRNA decay (NMD).
    Source sequence(s)
    AB041843, AC007372, AF093774, BC136514

  2. NR_158991.1 RNA Sequence

    Status: REVIEWED

    Description
    Transcript Variant: This variant (5, also known as hDII-c) contains two internal novel exons compared to variant 1. This variant is represented as non-coding because the use of the 5'-most translational start codon, as used in variant 1, renders this transcript a candidate for nonsense-mediated mRNA decay (NMD).
    Source sequence(s)
    AB041844, AC007372, AF093774, BC136514

RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2023_10

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p14 Primary Assembly

Genomic

  1. NC_000014.9 Reference GRCh38.p14 Primary Assembly

    Range
    80197526..80231057 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

Alternate T2T-CHM13v2.0

Genomic

  1. NC_060938.1 Alternate T2T-CHM13v2.0

    Range
    74407785..74441322 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

Suppressed Reference Sequence(s)

The following Reference Sequences have been suppressed. Explain

  1. NM_001007023.4: Suppressed sequence

    Description
    NM_001007023.4: This RefSeq was removed because it is a nonsense-mediated mRNA decay (NMD) candidate.

  2. NM_001242503.2: Suppressed sequence

    Description
    NM_001242503.2: This RefSeq was removed because currently there is partial support for the transcript but none for the protein.
Nucleotide Protein
Heading Accession and Version
Protein Accession Links
GenPept Link UniProtKB Link
Q92813.4 GenPept UniProtKB/Swiss-Prot:Q92813

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