rs768743801

Variant names:

• chr14-80202870-C-A
• rs768743801
• NM_013989.5:c.641G>T

Your query was ambiguous. Multiple possible variants found:

• chr14-80202870-C-A
• chr14-80202870-C-G
• chr14-80202870-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_013989.5(DIO2):​c.641G>T​(p.Arg214Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,461,708 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: DIO2 NM_013989.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.03
• Publications: 1 publications found

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.24300113).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_013989.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DIO2	NM_013989.5	MANE Select	c.641G>T	p.Arg214Leu	missense	Exon 2 of 2	NP_054644.1	Q92813-1
	DIO2	NM_000793.6		c.641G>T	p.Arg214Leu	missense	Exon 4 of 4	NP_000784.3
	DIO2	NM_001324462.2		c.641G>T	p.Arg214Leu	missense	Exon 3 of 3	NP_001311391.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DIO2	ENST00000438257.9	TSL:1 MANE Select	c.641G>T	p.Arg214Leu	missense	Exon 2 of 2	ENSP00000405854.5	Q92813-1
	DIO2	ENST00000556811.5	TSL:1	c.*442G>T		3_prime_UTR	Exon 3 of 3	ENSP00000451971.1	H0YJQ8
	DIO2	ENST00000555750.2	TSL:1	n.*479G>T		non_coding_transcript_exon	Exon 3 of 3	ENSP00000450980.2	A0A024R6J8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000803 AC: 2 AN: 249204 AF XY: 0.0000148

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000111

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461708 Hom.: 0 Cov.: 30 AF XY: 0.00000413 AC XY: 3 AN XY: 727136

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.000126 AC: 5 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111866

Other (OTH) AF: 0.00 AC: 0 AN: 60374

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000826 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.32	T
BayesDel_noAF	Benign	-0.47
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.054	T
Eigen	Benign	0.037
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Uncertain	0.88	D
MetaRNN	Benign	0.24	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	N
PhyloP100		6.0
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.10
Sift	Benign	0.057	T
Sift4G	Uncertain	0.035	D
Polyphen		0.22	B
MutPred		0.57		Gain of catalytic residue at V211 (P = 0.0012)
MVP		0.54
MPC		0.37
ClinPred		0.40	T
GERP RS		5.8
Varity_R		0.14
Mutation Taster		=84/16	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs768743801; hg19: chr14-80669213; COSMIC: COSV70445165;