rs144263012

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_006279.5(ST3GAL3):c.782G>A(p.Arg261Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000539 in 1,614,078 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000051 ( 0 hom. )

Consequence

ST3GAL3
NM_006279.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.83

Publications

3 publications found

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 Gene-Disease associations (from GenCC):

developmental and epileptic encephalopathy, 15
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
intellectual disability, autosomal recessive 12
Inheritance: AR Classification: STRONG Submitted by: G2P
complex neurodevelopmental disorder
Inheritance: AR Classification: MODERATE Submitted by: ClinGen
infantile spasms
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
autosomal recessive non-syndromic intellectual disability
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ST3GAL3 links:

ENSG00000284989 (HGNC:):

ENSG00000284989 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.058948576).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ST3GAL3	NM_006279.5 link	c.782G>A	p.Arg261Gln	missense_variant	Exon 10 of 12	ENST00000347631.8	NP_006270.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
ST3GAL3	ENST00000347631.8 link	c.782G>A	p.Arg261Gln	missense_variant	Exon 10 of 12	5	NM_006279.5	ENSP00000317192.6
ENSG00000284989	ENST00000645057.1 link	n.*2104G>A		non_coding_transcript_exon_variant	Exon 24 of 26			ENSP00000494063.1
ENSG00000284989	ENST00000645057.1 link	n.*2104G>A		3_prime_UTR_variant	Exon 24 of 26			ENSP00000494063.1

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152080

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.00

GnomAD2 exomes

AF:

0.0000716

AC:

AN:

251436

AF XY:

0.0000957

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000967

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000513

AC:

AN:

1461878

Hom.:

Cov.:

AF XY:

0.0000633

AC XY:

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.0000447

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000162

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53408

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000513

AC:

AN:

1112008

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74406

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41528

American (AMR)

AF:

0.000131

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5156

South Asian (SAS)

AF:

0.000207

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68006

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

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:

0.0000867

Hom.:

Bravo

AF:

0.0000378

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000906

AC:

EpiCase

AF:

0.000273

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jul 06, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.782G>A (p.R261Q) alteration is located in exon 10 (coding exon 9) of the ST3GAL3 gene. This alteration results from a G to A substitution at nucleotide position 782, causing the arginine (R) at amino acid position 261 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Developmental and epileptic encephalopathy

Uncertain:1

Oct 17, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 261 of the ST3GAL3 protein (p.Arg261Gln). This variant is present in population databases (rs144263012, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with ST3GAL3-related conditions. ClinVar contains an entry for this variant (Variation ID: 461329). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt ST3GAL3 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided

Uncertain:1

Breakthrough Genomics, Breakthrough Genomics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.077

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.53

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.086

T;.;.;.;.;.;.;.;T;.;.;.;.;T;.;.;.

Eigen

Benign

-0.15

Eigen_PC

Benign

-0.012

FATHMM_MKL

Benign

0.68

LIST_S2

Uncertain

0.93

.;D;D;D;D;D;D;D;.;D;D;D;D;D;D;D;D

M_CAP

Benign

0.0096

MetaRNN

Benign

0.059

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.85

L;.;.;.;.;.;.;.;L;.;.;.;.;L;.;.;.

PhyloP100

2.8

PrimateAI

Benign

0.45

PROVEAN

Benign

-0.46

.;N;N;N;.;.;.;.;.;.;N;.;.;.;N;.;.

REVEL

Benign

0.053

Sift

Benign

0.093

.;T;T;T;.;.;.;.;.;.;T;.;.;.;T;.;.

Sift4G

Benign

0.36

.;T;T;T;.;.;.;.;.;.;T;.;.;.;T;.;.

Polyphen

0.075

B;B;B;B;.;.;B;B;B;.;B;.;.;B;.;.;.

Vest4

0.21, 0.20, 0.20, 0.20, 0.20

MVP

0.13

MPC

0.70

ClinPred

0.051

GERP RS

4.6

Varity_R

0.11

gMVP

0.57

Mutation Taster

=86/14

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