rs1315091228

Variant names:

• chr22-19941716-C-A
• rs1315091228
• NM_006440.5:c.88G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_006440.5(TXNRD2):​c.88G>T​(p.Ala30Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000808 in 1,484,778 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. A30A) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000083 (0 hom.)
• Consequence: TXNRD2 NM_006440.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 2.23
• Publications: 0 publications found

Genes affected

TXNRD2 (HGNC:18155): (thioredoxin reductase 2) The protein encoded by this gene belongs to the pyridine nucleotide-disulfide oxidoreductase family, and is a member of the thioredoxin (Trx) system. Three thioredoxin reductase (TrxR) isozymes are found in mammals. TrxRs are selenocysteine-containing flavoenzymes, which reduce thioredoxins, as well as other substrates, and play a key role in redox homoeostasis. This gene encodes a mitochondrial form important for scavenging reactive oxygen species in mitochondria. It functions as a homodimer containing FAD, and selenocysteine (Sec) at the active site. Sec is encoded by UGA codon that normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, the Sec insertion sequence (SECIS) element, which is necessary for the recognition of UGA as a Sec codon rather than as a stop signal. Alternatively spliced transcript variants encoding different isoforms, including a few localized in the cytosol and some lacking the C-terminal Sec residue, have been found for this gene. [provided by RefSeq, Jun 2017]

COMT (HGNC:2228): (catechol-O-methyltransferase) Catechol-O-methyltransferase catalyzes the transfer of a methyl group from S-adenosylmethionine to catecholamines, including the neurotransmitters dopamine, epinephrine, and norepinephrine. This O-methylation results in one of the major degradative pathways of the catecholamine transmitters. In addition to its role in the metabolism of endogenous substances, COMT is important in the metabolism of catechol drugs used in the treatment of hypertension, asthma, and Parkinson disease. COMT is found in two forms in tissues, a soluble form (S-COMT) and a membrane-bound form (MB-COMT). The differences between S-COMT and MB-COMT reside within the N-termini. Several transcript variants are formed through the use of alternative translation initiation sites and promoters. [provided by RefSeq, Sep 2008]

COMT Gene-Disease associations (from GenCC):

• paroxysmal dyskinesia

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.16247773).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006440.5. 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
	TXNRD2	NM_006440.5	MANE Select	c.88G>T	p.Ala30Ser	missense	Exon 1 of 18	NP_006431.2
	TXNRD2	NM_001352300.2		c.88G>T	p.Ala30Ser	missense	Exon 1 of 17	NP_001339229.1
	TXNRD2	NM_001282512.3		c.88G>T	p.Ala30Ser	missense	Exon 1 of 12	NP_001269441.1	E7EWK1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TXNRD2	ENST00000400521.7	TSL:1 MANE Select	c.88G>T	p.Ala30Ser	missense	Exon 1 of 18	ENSP00000383365.1	Q9NNW7-1
	TXNRD2	ENST00000400519.6	TSL:1	c.88G>T	p.Ala30Ser	missense	Exon 1 of 17	ENSP00000383363.1	A0A182DWF3
	TXNRD2	ENST00000334363.14	TSL:1	c.88G>T	p.Ala30Ser	missense	Exon 1 of 12	ENSP00000334451.9	E7EWK1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152086 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00 AC: 0 AN: 89678 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000825 AC: 11 AN: 1332692 Hom.: 0 Cov.: 31 AF XY: 0.00000913 AC XY: 6 AN XY: 657228

African (AFR) AF: 0.00 AC: 0 AN: 26844

American (AMR) AF: 0.00 AC: 0 AN: 28996

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23278

East Asian (EAS) AF: 0.00 AC: 0 AN: 30250

South Asian (SAS) AF: 0.00 AC: 0 AN: 74078

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33160

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3920

European-Non Finnish (NFE) AF: 0.0000104 AC: 11 AN: 1056858

Other (OTH) AF: 0.00 AC: 0 AN: 55308

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152086 Hom.: 0 Cov.: 33 AF XY: 0.0000135 AC XY: 1 AN XY: 74314

African (AFR) AF: 0.00 AC: 0 AN: 41408

American (AMR) AF: 0.00 AC: 0 AN: 15272

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10598

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67992

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Cardiovascular phenotype (1)
-	1	-	Primary dilated cardiomyopathy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.096
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	13
DANN	Uncertain	0.99
DEOGEN2	Benign	0.055	T
Eigen	Benign	-0.77
Eigen_PC	Benign	-0.81
FATHMM_MKL	Benign	0.10	N
LIST_S2	Benign	0.53	T
M_CAP	Pathogenic	0.35	D
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-0.88	T
MutationAssessor	Benign	0.0	N
PhyloP100		2.2
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	-0.25	N
REVEL	Benign	0.056
Sift	Benign	0.61	T
Sift4G	Benign	0.53	T
Polyphen		0.75	P
Vest4		0.36
MutPred		0.35		Gain of phosphorylation at A30 (P = 0.0169)
MVP		0.46
MPC		0.19
ClinPred		0.18	T
GERP RS		1.4
PromoterAI		-0.024	Neutral
RBP_binding_hub_radar		1.0
RBP_regulation_power_radar		3.6
Varity_R		0.053
Mutation Taster		=83/17	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: rs1315091228; hg19: chr22-19929239;