4-24799580-C-T

Position:

• chr4-24799580-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003102.4(SOD3):​c.59C>T​(p.Thr20Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000483 in 1,450,652 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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: 0.0000048 (0 hom.)
• Consequence: SOD3 NM_003102.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.748

Genes affected

SOD3 (HGNC:11181): (superoxide dismutase 3) This gene encodes a member of the superoxide dismutase (SOD) protein family. SODs are antioxidant enzymes that catalyze the conversion of superoxide radicals into hydrogen peroxide and oxygen, which may protect the brain, lungs, and other tissues from oxidative stress. Proteolytic processing of the encoded protein results in the formation of two distinct homotetramers that differ in their ability to interact with the extracellular matrix (ECM). Homotetramers consisting of the intact protein, or type C subunit, exhibit high affinity for heparin and are anchored to the ECM. Homotetramers consisting of a proteolytically cleaved form of the protein, or type A subunit, exhibit low affinity for heparin and do not interact with the ECM. A mutation in this gene may be associated with increased heart disease risk. [provided by RefSeq, Oct 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.075006425).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SOD3	NM_003102.4	c.59C>T	p.Thr20Met	missense_variant	2/2	ENST00000382120.4	NP_003093.2
SOD3	XR_427488.2	n.154C>T		non_coding_transcript_exon_variant	2/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SOD3	ENST00000382120.4	c.59C>T	p.Thr20Met	missense_variant	2/2	1	NM_003102.4	ENSP00000371554	P1
SOD3	ENST00000598411.1	c.59C>T	p.Thr20Met	missense_variant	3/3	5		ENSP00000472134

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000483 AC: 7 AN: 1450652 Hom.: 0 Cov.: 31 AF XY: 0.00000416 AC XY: 3 AN XY: 721774

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000253

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 02, 2023

The c.59C>T (p.T20M) alteration is located in exon 2 (coding exon 1) of the SOD3 gene. This alteration results from a C to T substitution at nucleotide position 59, causing the threonine (T) at amino acid position 20 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.077
BayesDel_addAF	Benign	-0.053	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	1.5
DANN	Benign	0.93
DEOGEN2	Benign	0.063	T;T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.38	T;T
M_CAP	Uncertain	0.19	D
MetaRNN	Benign	0.075	T;T
MetaSVM	Uncertain	0.26	D
MutationAssessor	Benign	0.41	.;N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.37	T
PROVEAN	Benign	-0.72	.;N
REVEL	Benign	0.18
Sift	Benign	0.050	.;D
Sift4G	Benign	0.27	T;T
Polyphen		0.038	.;B
Vest4		0.15
MutPred		0.15		Loss of phosphorylation at T20 (P = 0.029);Loss of phosphorylation at T20 (P = 0.029);
MVP		0.56
MPC		0.97
ClinPred		0.042	T
GERP RS		-3.4
Varity_R		0.015
gMVP		0.55

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-24801202; COSMIC: COSV66125507;