21-31659803-G-T

Position:

chr21-31659803-G-T

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PP3PP5_Moderate

The NM_000454.5(SOD1):c.34G>T(p.Asp12Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,613,790 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

SOD1
NM_000454.5 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 2.20

Variant links:

Genes affected

SOD1 (HGNC:11179): (superoxide dismutase 1) The protein encoded by this gene binds copper and zinc ions and is one of two isozymes responsible for destroying free superoxide radicals in the body. The encoded isozyme is a soluble cytoplasmic protein, acting as a homodimer to convert naturally-occuring but harmful superoxide radicals to molecular oxygen and hydrogen peroxide. The other isozyme is a mitochondrial protein. In addition, this protein contains an antimicrobial peptide that displays antibacterial, antifungal, and anti-MRSA activity against E. coli, E. faecalis, S. aureus, S. aureus MRSA LPV+, S. agalactiae, and yeast C. krusei. Mutations in this gene have been implicated as causes of familial amyotrophic lateral sclerosis. Rare transcript variants have been reported for this gene. [provided by RefSeq, Jul 2020]

SOD1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PM1

In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 4 uncertain in NM_000454.5

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.808

PP5

Variant 21-31659803-G-T is Pathogenic according to our data. Variant chr21-31659803-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2690932.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SOD1	NM_000454.5 linkuse as main transcript	c.34G>T	p.Asp12Tyr	missense_variant	1/5	ENST00000270142.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
SOD1	ENST00000270142.11 linkuse as main transcript	c.34G>T	p.Asp12Tyr	missense_variant	1/5	1	NM_000454.5	P1
SOD1	ENST00000389995.4 linkuse as main transcript	c.15+19G>T		intron_variant		3
SOD1	ENST00000470944.1 linkuse as main transcript	n.95G>T		non_coding_transcript_exon_variant	1/5	2
SOD1	ENST00000476106.5 linkuse as main transcript	n.111G>T		non_coding_transcript_exon_variant	1/5	5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152280

Hom.:

Cov.:

show subpopulations

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

GnomAD3 exomes

AF:

0.00000799

AC:

AN:

250462

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135670

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000466

Gnomad NFE exome

AF:

0.00000884

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461510

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727088

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152280

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74400

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Amyotrophic lateral sclerosis type 1

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Concord Molecular Medicine Laboratory, Concord Repatriation General Hospital

Jan 29, 2024

This variant was detected in homozygous state in a male patient with a clinical diagnosis of ALS1 in his early 40s. Patient presented with rapidly progressive limb weakness over 1.5 years. The c.34G>T variant (p.(Asp12Tyr), also known as D11Y) has been reported in multiple heterozygous individuals with ALS1 in Italian population (PMID: 20740631, 21839474, 32987860, 35328090). It was suggested this variant has a founder effect in Italian population with specific phenotype and incomplete penetrance as a dominant trait (PMID: 22292847, 38112783). Described patients with heterozygous SOD1 c.34G>T variant showed slow progression with distal limb involvement, and predominant lower motor neuron signs (PMID: 32250500). It is found in control population at low frequency (rs762628133, gnomAD 0.0003%). In silico analysis suggests this variant to be damaging (REVEL: 0.65). The variant is in the critical superoxide dismutase copper/zinc binding domain (IPR001424). The current evidence allows a classification of the variant as “likely pathogenic” (ACMG criteria: PM1, PM2_supporting, PM3_supporting, PP1_moderate, PP3). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Pathogenic

0.27

BayesDel_noAF

Pathogenic

0.15

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.83

Eigen

Uncertain

0.54

Eigen_PC

Uncertain

0.43

FATHMM_MKL

Benign

0.61

LIST_S2

Uncertain

0.95

M_CAP

Pathogenic

0.97

MetaRNN

Pathogenic

0.81

MetaSVM

Pathogenic

0.91

MutationAssessor

Pathogenic

3.6

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.46

PROVEAN

Pathogenic

-5.1

REVEL

Pathogenic

0.65

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.034

Polyphen

0.86

Vest4

0.39

MutPred

0.50

Gain of MoRF binding (P = 0.0708);

MVP

0.96

MPC

2.4

ClinPred

0.94

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.79

gMVP

0.88

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over