rs138762270

Positions:

chr1-43431072-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_001365999.1(SZT2):c.4898C>T(p.Ser1633Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00316 in 1,613,798 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. S1633S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0033 ( 14 hom. )

Consequence

SZT2
NM_001365999.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:7

Conservation

PhyloP100: 2.98

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:

SZT2 (HGNC:):

SZT2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 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=0.009296387).

BP6

Variant 1-43431072-C-T is Benign according to our data. Variant chr1-43431072-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 586766.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2, Benign=2}. Variant chr1-43431072-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.00328 (4801/1461608) while in subpopulation NFE AF= 0.00383 (4258/1111902). AF 95% confidence interval is 0.00373. There are 14 homozygotes in gnomad4_exome. There are 2380 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 14 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SZT2	NM_001365999.1 linkuse as main transcript	c.4898C>T	p.Ser1633Leu	missense_variant	33/72	ENST00000634258.3	NP_001352928.1
SZT2	NM_015284.4 linkuse as main transcript	c.4727C>T	p.Ser1576Leu	missense_variant	32/71		NP_056099.3	Q5T011-5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
SZT2	ENST00000634258.3 linkuse as main transcript	c.4898C>T	p.Ser1633Leu	missense_variant	33/72	5	NM_001365999.1	ENSP00000489255.1	Q5T011-1
SZT2	ENST00000562955.2 linkuse as main transcript	c.4727C>T	p.Ser1576Leu	missense_variant	32/71	5		ENSP00000457168.1	Q5T011-5
SZT2	ENST00000648058.1 linkuse as main transcript	n.38C>T		non_coding_transcript_exon_variant	1/40

Frequencies

GnomAD3 genomes

AF:

0.00199

AC:

303

AN:

152072

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00111

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000524

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00332

Gnomad FIN

AF:

0.000943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00318

Gnomad OTH

AF:

0.00239

GnomAD3 exomes

AF:

0.00190

AC:

477

AN:

251034

Hom.:

AF XY:

0.00216

AC XY:

293

AN XY:

135676

show subpopulations

Gnomad AFR exome

AF:

0.000739

Gnomad AMR exome

AF:

0.000957

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00265

Gnomad FIN exome

AF:

0.000740

Gnomad NFE exome

AF:

0.00281

Gnomad OTH exome

AF:

0.00261

GnomAD4 exome

AF:

0.00328

AC:

4801

AN:

1461608

Hom.:

Cov.:

AF XY:

0.00327

AC XY:

2380

AN XY:

727114

show subpopulations

Gnomad4 AFR exome

AF:

0.000777

Gnomad4 AMR exome

AF:

0.00103

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00262

Gnomad4 FIN exome

AF:

0.000599

Gnomad4 NFE exome

AF:

0.00383

Gnomad4 OTH exome

AF:

0.00348

GnomAD4 genome

AF:

0.00199

AC:

303

AN:

152190

Hom.:

Cov.:

AF XY:

0.00172

AC XY:

128

AN XY:

74388

show subpopulations

Gnomad4 AFR

AF:

0.00111

Gnomad4 AMR

AF:

0.000523

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00332

Gnomad4 FIN

AF:

0.000943

Gnomad4 NFE

AF:

0.00318

Gnomad4 OTH

AF:

0.00237

Alfa

AF:

0.00279

Hom.:

Bravo

AF:

0.00196

TwinsUK

AF:

0.00189

AC:

ALSPAC

AF:

0.00259

AC:

ESP6500AA

AF:

0.00136

AC:

ESP6500EA

AF:

0.00221

AC:

ExAC

AF:

0.00170

AC:

207

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.00316

EpiControl

AF:

0.00237

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:5

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Nov 01, 2024	SZT2: BP4, BS2 -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 31, 2020	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Aug 29, 2017	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -

Developmental and epileptic encephalopathy, 18

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Jan 13, 2018

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 15, 2017

This alteration is classified as 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

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 28, 2020

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

0.10

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.26

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.047

T;.

Eigen

Benign

0.028

Eigen_PC

Benign

0.027

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.88

D;D

M_CAP

Benign

0.0096

MetaRNN

Benign

0.0093

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.20

N;.

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-0.89

.;N

Sift

Benign

0.28

.;T

Sift4G

Uncertain

0.046

D;D

Polyphen

0.95

.;P

Vest4

0.38

MVP

0.36

MPC

0.26

ClinPred

0.030

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.16

gMVP

0.27

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

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