chr2-85840365-C-T

Position:

chr2-85840365-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 4P and 9B. PM1PM2BP4_StrongBP6BS1

The ENST00000638572.2(ST3GAL5):c.1036G>A(p.Val346Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000126 in 1,614,006 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 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 0.00030 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 1 hom. )

Consequence

ST3GAL5
ENST00000638572.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:2

Conservation

PhyloP100: 2.63

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 4 uncertain in ENST00000638572.2

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.010082662).

BP6

Variant 2-85840365-C-T is Benign according to our data. Variant chr2-85840365-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 337334.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=2}.

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000296 (45/152172) while in subpopulation EAS AF= 0.0027 (14/5182). AF 95% confidence interval is 0.00163. There are 0 homozygotes in gnomad4. There are 24 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ST3GAL5	NM_003896.4 linkuse as main transcript	c.1036G>A	p.Val346Ile	missense_variant	7/7	ENST00000638572.2	NP_003887.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ST3GAL5	ENST00000638572.2 linkuse as main transcript	c.1036G>A	p.Val346Ile	missense_variant	7/7	1	NM_003896.4	ENSP00000491316	A1	Q9UNP4-1

Frequencies

GnomAD3 genomes

AF:

0.000296

AC:

AN:

152054

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000556

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00250

Gnomad SAS

AF:

0.000830

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000330

AC:

AN:

251308

Hom.:

AF XY:

0.000309

AC XY:

AN XY:

135810

show subpopulations

Gnomad AFR exome

AF:

0.000554

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00337

Gnomad SAS exome

AF:

0.000261

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000108

AC:

158

AN:

1461834

Hom.:

Cov.:

AF XY:

0.000105

AC XY:

AN XY:

727206

show subpopulations

Gnomad4 AFR exome

AF:

0.000508

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00169

Gnomad4 SAS exome

AF:

0.000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000899

Gnomad4 OTH exome

AF:

0.000563

GnomAD4 genome

AF:

0.000296

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.000323

AC XY:

AN XY:

74394

show subpopulations

Gnomad4 AFR

AF:

0.000530

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00270

Gnomad4 SAS

AF:

0.000830

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000176

Hom.:

Bravo

AF:

0.000242

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000305

AC:

Asia WGS

AF:

0.00577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

GM3 synthase deficiency

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 30, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Eurofins Ntd Llc (ga)

Jun 12, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.077

BayesDel_addAF

Benign

-0.53

BayesDel_noAF

Benign

-0.54

CADD

Benign

DANN

Benign

0.71

DEOGEN2

Benign

0.18

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

Eigen

Benign

-0.60

Eigen_PC

Benign

-0.47

FATHMM_MKL

Uncertain

0.80

LIST_S2

Benign

0.84

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

M_CAP

Benign

0.0085

MetaRNN

Benign

0.010

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

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.71

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

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.25

PROVEAN

Benign

0.080

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

REVEL

Benign

0.067

Sift

Benign

0.44

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

Sift4G

Benign

0.84

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

Polyphen

0.13

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

Vest4

0.20

MVP

0.030

MPC

0.29

ClinPred

0.013

GERP RS

4.9

Varity_R

0.10

gMVP

0.40

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