2-85840325-G-A

Position:

chr2-85840325-G-A

Variant summary

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

The NM_003896.4(ST3GAL5):c.1076C>T(p.Ala359Val) variant causes a missense change. The variant allele was found at a frequency of 0.000057 in 1,613,734 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. A359A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000060 ( 0 hom. )

Consequence

ST3GAL5
NM_003896.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.78

Variant links:

Genes affected

ST3GAL5 (HGNC:10872): (ST3 beta-galactoside alpha-2,3-sialyltransferase 5) Ganglioside GM3 is known to participate in the induction of cell differentiation, modulation of cell proliferation, maintenance of fibroblast morphology, signal transduction, and integrin-mediated cell adhesion. The protein encoded by this gene is a type II membrane protein which catalyzes the formation of GM3 using lactosylceramide as the substrate. The encoded protein is a member of glycosyltransferase family 29 and may be localized to the Golgi apparatus. Mutation in this gene has been associated with Amish infantile epilepsy syndrome. Transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ST3GAL5 links:

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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/exons	MANE	UniProt
ST3GAL5	NM_003896.4 linkuse as main transcript	c.1076C>T	p.Ala359Val	missense_variant	7/7	ENST00000638572.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ST3GAL5	ENST00000638572.2 linkuse as main transcript	c.1076C>T	p.Ala359Val	missense_variant	7/7	1	NM_003896.4	A1	Q9UNP4-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000835

AC:

AN:

251390

Hom.:

AF XY:

0.0000957

AC XY:

AN XY:

135862

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000167

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000602

AC:

AN:

1461616

Hom.:

Cov.:

AF XY:

0.0000605

AC XY:

AN XY:

727042

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000711

Gnomad4 OTH exome

AF:

0.0000993

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74314

show subpopulations

Gnomad4 AFR

AF:

0.0000242

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:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000887

Hom.:

Bravo

AF:

0.0000340

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

GM3 synthase deficiency

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 01, 2022

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 359 of the ST3GAL5 protein (p.Ala359Val). This variant is present in population databases (rs201425015, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with ST3GAL5-related conditions. ClinVar contains an entry for this variant (Variation ID: 578981). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C55". The valine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.41

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.51

D;.;.;.;.;.;.;.;.;.;T;.

Eigen

Benign

0.052

Eigen_PC

Benign

0.032

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.89

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

M_CAP

Benign

0.033

MetaRNN

Uncertain

0.47

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

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.9

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

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-3.5

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

REVEL

Benign

0.21

Sift

Uncertain

0.011

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

Sift4G

Uncertain

0.022

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

Polyphen

0.95

P;D;D;D;.;.;.;D;D;D;.;D

Vest4

0.49, 0.49

MVP

0.14

MPC

0.74

ClinPred

0.58

GERP RS

1.8

Varity_R

0.24

gMVP

0.70

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