1-43441565-G-A

Position:

chr1-43441565-G-A

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_001365999.1(SZT2):c.7573G>A(p.Val2525Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00119 in 1,614,176 control chromosomes in the GnomAD database, including 24 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict 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. V2525G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0065 ( 9 hom., cov: 32)

Exomes 𝑓: 0.00063 ( 15 hom. )

Consequence

SZT2
NM_001365999.1 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 1.31

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SZT2. . Gene score misZ 2.5968 (greater than the threshold 3.09). Trascript score misZ 4.0086 (greater than threshold 3.09). GenCC has associacion of gene with undetermined early-onset epileptic encephalopathy, developmental and epileptic encephalopathy, 18, developmental and epileptic encephalopathy.

BP4

Computational evidence support a benign effect (MetaRNN=0.0036810935).

BP6

Variant 1-43441565-G-A is Benign according to our data. Variant chr1-43441565-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 416970.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-43441565-G-A is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00652 (993/152290) while in subpopulation AFR AF= 0.0226 (941/41564). AF 95% confidence interval is 0.0214. There are 9 homozygotes in gnomad4. There are 487 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 9 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SZT2	NM_001365999.1 linkuse as main transcript	c.7573G>A	p.Val2525Ile	missense_variant	54/72	ENST00000634258.3
SZT2	NM_015284.4 linkuse as main transcript	c.7402G>A	p.Val2468Ile	missense_variant	53/71

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SZT2	ENST00000634258.3 linkuse as main transcript	c.7573G>A	p.Val2525Ile	missense_variant	54/72	5	NM_001365999.1	P1	Q5T011-1
SZT2	ENST00000562955.2 linkuse as main transcript	c.7402G>A	p.Val2468Ile	missense_variant	53/71	5			Q5T011-5
SZT2	ENST00000648058.1 linkuse as main transcript	n.4027G>A		non_coding_transcript_exon_variant	22/40
SZT2	ENST00000649403.1 linkuse as main transcript	n.2323G>A		non_coding_transcript_exon_variant	19/37

Frequencies

GnomAD3 genomes

AF:

0.00652

AC:

992

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0227

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00209

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00576

GnomAD3 exomes

AF:

0.00173

AC:

434

AN:

251412

Hom.:

AF XY:

0.00132

AC XY:

179

AN XY:

135866

show subpopulations

Gnomad AFR exome

AF:

0.0238

Gnomad AMR exome

AF:

0.000925

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000879

Gnomad OTH exome

AF:

0.000652

GnomAD4 exome

AF:

0.000634

AC:

927

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000550

AC XY:

400

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.0225

Gnomad4 AMR exome

AF:

0.000872

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000306

Gnomad4 OTH exome

AF:

0.00151

GnomAD4 genome

AF:

0.00652

AC:

993

AN:

152290

Hom.:

Cov.:

AF XY:

0.00654

AC XY:

487

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.0226

Gnomad4 AMR

AF:

0.00209

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000103

Gnomad4 OTH

AF:

0.00570

Alfa

AF:

0.00125

Hom.:

Bravo

AF:

0.00753

ESP6500AA

AF:

0.0268

AC:

118

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00218

AC:

265

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:5

Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 08, 2018	- -
Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Aug 31, 2017	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 27, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Sep 14, 2018	- -

Developmental and epileptic encephalopathy, 18

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Apr 11, 2023

- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 23, 2018

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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.64

BayesDel_noAF

Benign

-0.68

CADD

Benign

2.1

DANN

Benign

0.87

DEOGEN2

Benign

0.064

T;.

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.095

LIST_S2

Benign

0.57

T;T

MetaRNN

Benign

0.0037

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.1

L;.

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.30

PROVEAN

Benign

-0.36

.;N

Sift

Benign

1.0

.;T

Sift4G

Benign

0.068

T;T

Polyphen

0.0010

.;B

Vest4

0.14

MVP

0.072

MPC

0.30

ClinPred

0.0059

GERP RS

0.33

Varity_R

0.013

gMVP

0.27

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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