rs553120567

Positions:

chr1-43930172-G-A

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2

The NM_006279.5(ST3GAL3):c.1079G>A(p.Arg360Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000349 in 1,614,142 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 11/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00045 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00034 ( 2 hom. )

Consequence

ST3GAL3
NM_006279.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:2

Conservation

PhyloP100: 4.70

Variant links:

Genes affected

ST3GAL3 (HGNC:10866): (ST3 beta-galactoside alpha-2,3-sialyltransferase 3) The protein encoded by this gene is a type II membrane protein that catalyzes the transfer of sialic acid from CMP-sialic acid to galactose-containing substrates. The encoded protein is normally found in the Golgi apparatus but can be proteolytically processed to a soluble form. This protein is a member of glycosyltransferase family 29. Mutations in this gene have been associated with a form of autosomal recessive nonsymdromic cognitive disability as well as infantile epileptic encephalopathy. Multiple transcript variants encoding several different isoforms have been found for this gene. [provided by RefSeq, Jul 2017]

ST3GAL3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0049929023).

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000453 (69/152352) while in subpopulation SAS AF= 0.006 (29/4830). AF 95% confidence interval is 0.00429. There are 1 homozygotes in gnomad4. There are 38 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ST3GAL3	NM_006279.5 linkuse as main transcript	c.1079G>A	p.Arg360Gln	missense_variant	12/12	ENST00000347631.8	NP_006270.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ST3GAL3	ENST00000347631.8 linkuse as main transcript	c.1079G>A	p.Arg360Gln	missense_variant	12/12	5	NM_006279.5	ENSP00000317192	A1	Q11203-1

Frequencies

GnomAD3 genomes

AF:

0.000460

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00229

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.000728

AC:

183

AN:

251432

Hom.:

AF XY:

0.000912

AC XY:

124

AN XY:

135896

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000983

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00441

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00212

GnomAD4 exome

AF:

0.000338

AC:

494

AN:

1461790

Hom.:

Cov.:

AF XY:

0.000469

AC XY:

341

AN XY:

727204

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00119

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00470

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000719

Gnomad4 OTH exome

AF:

0.000397

GnomAD4 genome

AF:

0.000453

AC:

AN:

152352

Hom.:

Cov.:

AF XY:

0.000510

AC XY:

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.00229

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00600

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000132

Hom.:

Bravo

AF:

0.000638

ExAC

AF:

0.000881

AC:

107

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Mar 18, 2014	- -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jan 01, 2022	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 10, 2017

The p.R360Q variant (also known as c.1079G>A), located in coding exon 11 of the ST3GAL3 gene, results from a G to A substitution at nucleotide position 1079. The arginine at codon 360 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Intellectual disability, autosomal recessive 12;C3554316:Developmental and epileptic encephalopathy, 15

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Mar 30, 2021

ST3GAL3 NM_174963.4 exon 13 p.Arg429Gln (c.1286G>A): This variant has not been reported in the literature but is present in 0.4% (135/30616) of South Asian alleles in the Genome Aggregation Database (http://gnomad.broadinstitute.org/variant/1-44395844-G-A). This variant is present in ClinVar (Variation ID:130377). Evolutionary conservation and computational predictive tools for this variant are unclear. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -

ST3GAL3-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 06, 2022

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). -

Early infantile epileptic encephalopathy with suppression bursts

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 27, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.079

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.29

CADD

Benign

DANN

Uncertain

0.99

Eigen

Benign

-0.25

Eigen_PC

Benign

-0.13

FATHMM_MKL

Uncertain

0.81

LIST_S2

Benign

0.52

T;T;T;.

M_CAP

Uncertain

0.097

MetaRNN

Benign

0.0050

T;T;T;T

MetaSVM

Benign

-1.0

MutationTaster

Benign

1.0

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;N;N;N;N;N;N

PROVEAN

Benign

0.33

.;N;N;N

REVEL

Benign

0.12

Sift

Pathogenic

0.0

.;D;D;D

Sift4G

Pathogenic

0.0

.;.;D;.

Polyphen

0.0060

B;B;B;B

Vest4

0.073

MutPred

0.38

.;Gain of MoRF binding (P = 6e-04);.;.;

MVP

0.13

ClinPred

0.055

GERP RS

3.6

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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