rs76675748

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001365999.1(SZT2):c.4531G>A(p.Val1511Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.005 in 1,614,228 control chromosomes in the GnomAD database, including 39 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V1511A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0036 ( 1 hom., cov: 32)

Exomes 𝑓: 0.0051 ( 38 hom. )

Consequence

SZT2
NM_001365999.1 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:12

Conservation

PhyloP100: 9.42

Publications

6 publications found

Variant links:

Genes affected

SZT2 (HGNC:29040): (SZT2 subunit of KICSTOR complex) The protein encoded by this gene is expressed in the brain, predominantly in the parietal and frontal cortex as well as in dorsal root ganglia. It is localized to the peroxisome, and is implicated in resistance to oxidative stress. It likely functions by increasing superoxide dismutase (SOD) activity, but itself has no direct SOD activity. Studies in mice show that this gene confers low seizure threshold, and may also enhance epileptogenesis. [provided by RefSeq, Jun 2011]

SZT2 Gene-Disease associations (from GenCC):

developmental and epileptic encephalopathy, 18
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Illumina
genetic developmental and epileptic encephalopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
undetermined early-onset epileptic encephalopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SZT2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP4

Computational evidence support a benign effect (MetaRNN=0.008562744).

BP6

Variant 1-43430546-G-A is Benign according to our data. Variant chr1-43430546-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 241034.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00356 (542/152342) while in subpopulation NFE AF = 0.00607 (413/68030). AF 95% confidence interval is 0.00559. There are 1 homozygotes in GnomAd4. There are 267 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 38 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SZT2	NM_001365999.1 link	c.4531G>A	p.Val1511Ile	missense_variant	Exon 32 of 72	ENST00000634258.3	NP_001352928.1
SZT2	NM_015284.4 link	c.4360G>A	p.Val1454Ile	missense_variant	Exon 31 of 71		NP_056099.3	Q5T011-5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SZT2	ENST00000634258.3 link	c.4531G>A	p.Val1511Ile	missense_variant	Exon 32 of 72	5	NM_001365999.1	ENSP00000489255.1	Q5T011-1
SZT2	ENST00000562955.2 link	c.4360G>A	p.Val1454Ile	missense_variant	Exon 31 of 71	5		ENSP00000457168.1	Q5T011-5
SZT2	ENST00000478140.1 link	n.392G>A		non_coding_transcript_exon_variant	Exon 3 of 3	2

Frequencies

GnomAD3 genomes

AF:

0.00356

AC:

542

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00106

Gnomad AMI

AF:

0.00329

Gnomad AMR

AF:

0.00340

Gnomad ASJ

AF:

0.00288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00269

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00607

Gnomad OTH

AF:

0.00287

GnomAD2 exomes

AF:

0.00353

AC:

888

AN:

251426

AF XY:

0.00353

show subpopulations

Gnomad AFR exome

AF:

0.00111

Gnomad AMR exome

AF:

0.00278

Gnomad ASJ exome

AF:

0.00159

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.000416

Gnomad NFE exome

AF:

0.00577

Gnomad OTH exome

AF:

0.00440

GnomAD4 exome

AF:

0.00515

AC:

7525

AN:

1461886

Hom.:

Cov.:

AF XY:

0.00503

AC XY:

3661

AN XY:

727246

show subpopulations

African (AFR)

AF:

0.000926

AC:

AN:

33480

American (AMR)

AF:

0.00286

AC:

128

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00145

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39700

South Asian (SAS)

AF:

0.00225

AC:

194

AN:

86256

European-Finnish (FIN)

AF:

0.000374

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00555

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00616

AC:

6855

AN:

1112008

Other (OTH)

AF:

0.00374

AC:

226

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

477

953

1430

1906

2383

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

266

532

798

1064

1330

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00356

AC:

542

AN:

152342

Hom.:

Cov.:

AF XY:

0.00358

AC XY:

267

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.00106

AC:

AN:

41578

American (AMR)

AF:

0.00340

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00288

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00269

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.0000941

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00607

AC:

413

AN:

68030

Other (OTH)

AF:

0.00284

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

105

131

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00494

Hom.:

Bravo

AF:

0.00365

TwinsUK

AF:

0.00512

AC:

ALSPAC

AF:

0.00701

AC:

ESP6500AA

AF:

0.00182

AC:

ESP6500EA

AF:

0.00419

AC:

ExAC

AF:

0.00349

AC:

424

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00513

EpiControl

AF:

0.00522

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:12

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:5

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 15, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 03, 2019

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Mar 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

SZT2: BS2 -

Developmental and epileptic encephalopathy, 18

Benign:3

Apr 11, 2023

Genome-Nilou Lab

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 19, 2022

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 30, 2019

Centre for Mendelian Genomics, University Medical Centre Ljubljana

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was classified as: Benign. The following ACMG criteria were applied in classifying this variant: BS1,BS2. -

not specified

Benign:2

Jan 03, 2024

Athena Diagnostics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 18, 2017

Genetic Services Laboratory, University of Chicago

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Aug 28, 2018

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

SZT2-related disorder

Benign:1

Jul 17, 2019

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.32

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.27

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.069

T;.

Eigen

Pathogenic

0.83

Eigen_PC

Pathogenic

0.86

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Benign

0.85

D;T

M_CAP

Benign

0.0024

MetaRNN

Benign

0.0086

T;T

MetaSVM

Benign

-0.42

MutationAssessor

Benign

2.0

M;.

PhyloP100

9.4

PrimateAI

Uncertain

0.58

PROVEAN

Benign

-0.38

.;N

Sift

Benign

0.13

.;T

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.39

MVP

0.37

MPC

0.83

ClinPred

0.028

GERP RS

6.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.29

gMVP

0.22

Mutation Taster

=85/15

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over