rs225013
Variant summary
Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Strong
The NM_013989.5(DIO2):c.223-298A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)
Failed GnomAD Quality Control
Consequence
DIO2
NM_013989.5 intron
NM_013989.5 intron
Scores
2
Clinical Significance
Not reported in ClinVar
Conservation
PhyloP100: -0.620
Genes affected
DIO2 (HGNC:2884): (iodothyronine deiodinase 2) 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]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -4 ACMG points.
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.85).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
DIO2 | NM_013989.5 | c.223-298A>T | intron_variant | ENST00000438257.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
DIO2 | ENST00000438257.9 | c.223-298A>T | intron_variant | 1 | NM_013989.5 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00 AC: 1AN: 152042Hom.: 0 Cov.: 33 FAILED QC
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We have no GnomAD4 exomes data on this position. Probably position not covered by the project.
GnomAD4 genome ? Data not reliable, filtered out with message: AS_VQSR AF: 0.00000657 AC: 1AN: 152160Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0AN XY: 74396
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?
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ClinVar
Not reported inComputational scores
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Name
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Prediction
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at