Genetic Variant ST6GAL2:p.Asn337His (chr2-106834081-T-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001142351.2(ST6GAL2):c.1009A>C(p.Asn337His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000193 in 1,613,656 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00020 ( 0 hom. )

Consequence

ST6GAL2
NM_001142351.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.99

Variant links:

Genes affected

ST6GAL2 (HGNC:10861): (ST6 beta-galactoside alpha-2,6-sialyltransferase 2) This locus encodes a sialyltransferase. The encoded type II transmembrane protein catalyzes the transfer of sialic acid from CMP to an oligosaccharide substrate. Polymorphisms at this locus may be associated with variations in risperidone response in schizophrenic patients. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jan 2012]

ST6GAL2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ST6GAL2	NM_001142351.2 link	c.1009A>C	p.Asn337His	missense_variant	Exon 3 of 6	ENST00000409382.8	NP_001135823.1	Q96JF0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ST6GAL2	ENST00000409382.8 link	c.1009A>C	p.Asn337His	missense_variant	Exon 3 of 6	1	NM_001142351.2	ENSP00000386942.3	Q96JF0-1
ST6GAL2	ENST00000361686.8 link	c.1009A>C	p.Asn337His	missense_variant	Exon 3 of 6	1		ENSP00000355273.4	Q96JF0-1
ST6GAL2	ENST00000409087.3 link	c.1009A>C	p.Asn337His	missense_variant	Exon 3 of 6	1		ENSP00000387332.3	Q96JF0-2

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152176

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000191

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000756

AC:

AN:

251318

Hom.:

AF XY:

0.0000810

AC XY:

AN XY:

135820

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000141

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000204

AC:

298

AN:

1461480

Hom.:

Cov.:

AF XY:

0.000190

AC XY:

138

AN XY:

727050

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000562

Gnomad4 NFE exome

AF:

0.000255

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.0000920

AC:

AN:

152176

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74336

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000191

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000116

Hom.:

Bravo

AF:

0.000110

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 16, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1009A>C (p.N337H) alteration is located in exon 3 (coding exon 2) of the ST6GAL2 gene. This alteration results from a A to C substitution at nucleotide position 1009, causing the asparagine (N) at amino acid position 337 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Benign

-0.13

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.28

T;T;.

Eigen

Pathogenic

0.72

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.94

.;D;D

M_CAP

Uncertain

0.11

MetaRNN

Uncertain

0.69

D;D;D

MetaSVM

Uncertain

0.34

MutationAssessor

Benign

1.9

L;L;L

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-2.8

D;D;D

REVEL

Pathogenic

0.66

Sift

Uncertain

0.0050

D;D;D

Sift4G

Uncertain

0.014

D;D;D

Polyphen

0.86

P;P;D

Vest4

0.52

MVP

0.73

MPC

1.4

ClinPred

0.50

GERP RS

5.9

Varity_R

0.39

gMVP

0.82

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