chr22-19918421-A-G

Variant names:

• chr22-19918421-A-G
• rs10427871
• NM_006440.5:c.375-204T>C

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_006440.5(TXNRD2):​c.375-204T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.02 in 152,340 control chromosomes in the GnomAD database, including 86 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency: Genomes: 𝑓 0.020 (86 hom., cov: 33)
• Consequence: TXNRD2 NM_006440.5 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.0740
• Publications: 4 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]

TXNRD2 Gene-Disease associations (from GenCC):

• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial glucocorticoid deficiency

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• dilated cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• glucocorticoid deficiency 5

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.99).
• BP6: Variant 22-19918421-A-G is Benign according to our data. Variant chr22-19918421-A-G is described in ClinVar as Benign. ClinVar VariationId is 1257530.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0655 is higher than 0.05.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TXNRD2	NM_006440.5	MANE Select	c.375-204T>C		intron	N/A	NP_006431.2
	TXNRD2	NM_001352300.2		c.372-204T>C		intron	N/A	NP_001339229.1
	TXNRD2	NM_001352301.2		c.285-204T>C		intron	N/A	NP_001339230.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TXNRD2	ENST00000400521.7	TSL:1 MANE Select	c.375-204T>C		intron	N/A	ENSP00000383365.1
	TXNRD2	ENST00000400519.6	TSL:1	c.372-204T>C		intron	N/A	ENSP00000383363.1
	TXNRD2	ENST00000400518.5	TSL:1	c.285-204T>C		intron	N/A	ENSP00000383362.1

Frequencies

GnomAD3 genomes AF: 0.0200 AC: 3046 AN: 152222 Hom.: 85 Cov.: 33

Gnomad AFR AF: 0.0676

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00674

Gnomad ASJ AF: 0.00115

Gnomad EAS AF: 0.0156

Gnomad SAS AF: 0.00352

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000279

Gnomad OTH AF: 0.00861

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0200 AC: 3053 AN: 152340 Hom.: 86 Cov.: 33 AF XY: 0.0197 AC XY: 1469 AN XY: 74500

African (AFR) AF: 0.0676 AC: 2811 AN: 41576

American (AMR) AF: 0.00673 AC: 103 AN: 15306

Ashkenazi Jewish (ASJ) AF: 0.00115 AC: 4 AN: 3470

East Asian (EAS) AF: 0.0156 AC: 81 AN: 5182

South Asian (SAS) AF: 0.00352 AC: 17 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000279 AC: 19 AN: 68032

Other (OTH) AF: 0.00852 AC: 18 AN: 2112

Alfa AF: 0.0101 Hom.: 24

Bravo AF: 0.0222

Asia WGS AF: 0.00779 AC: 27 AN: 3478

ClinVar

ClinVar submissions as Germline

Significance: Benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	not provided (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.99
CADD	Benign	4.3
DANN	Benign	0.55
PhyloP100		0.074
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs10427871; hg19: chr22-19905944;