chr6-159685093-A-T

Variant names:

• chr6-159685093-A-T
• rs2855116
• NM_000636.4:c.344-60T>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000636.4(SOD2):​c.344-60T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000866 in 1,155,236 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: not found (cov: 31)
  • Exomes 𝑓: 8.7e-7 (0 hom.)
• Consequence: SOD2 NM_000636.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.646
• Publications: 0 publications found

Genes affected

SOD2 (HGNC:11180): (superoxide dismutase 2) This gene is a member of the iron/manganese superoxide dismutase family. It encodes a mitochondrial protein that forms a homotetramer and binds one manganese ion per subunit. This protein binds to the superoxide byproducts of oxidative phosphorylation and converts them to hydrogen peroxide and diatomic oxygen. Mutations in this gene have been associated with idiopathic cardiomyopathy (IDC), premature aging, sporadic motor neuron disease, and cancer. Alternative splicing of this gene results in multiple transcript variants. A related pseudogene has been identified on chromosome 1. [provided by RefSeq, Apr 2016]

SOD2 Gene-Disease associations (from GenCC):

• cardiomyopathy

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SOD2	NM_000636.4	c.344-60T>A		intron_variant	Intron 3 of 4	ENST00000538183.7	NP_000627.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SOD2	ENST00000538183.7	c.344-60T>A		intron_variant	Intron 3 of 4	1	NM_000636.4	ENSP00000446252.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 8.66e-7 AC: 1 AN: 1155236 Hom.: 0 AF XY: 0.00000174 AC XY: 1 AN XY: 573606

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 24556

American (AMR) AF: 0.00 AC: 0 AN: 21060

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19292

East Asian (EAS) AF: 0.00 AC: 0 AN: 33842

South Asian (SAS) AF: 0.0000172 AC: 1 AN: 58228

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 46110

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4936

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 898976

Other (OTH) AF: 0.00 AC: 0 AN: 48236

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	9.1
DANN	Benign	0.77
PhyloP100		0.65

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: rs2855116; hg19: chr6-160106125;