Variant 12-22334225-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_003034.4(ST8SIA1):c.8C>T(p.Pro3Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000242 in 1,611,310 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

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

Exomes 𝑓: 0.000024 ( 0 hom. )

Consequence

ST8SIA1
NM_003034.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.659

Variant links:

Genes affected

ST8SIA1 (HGNC:10869): (ST8 alpha-N-acetyl-neuraminide alpha-2,8-sialyltransferase 1) Gangliosides are membrane-bound glycosphingolipids containing sialic acid. Ganglioside GD3 is known to be important for cell adhesion and growth of cultured malignant cells. The protein encoded by this gene is a type II membrane protein that catalyzes the transfer of sialic acid from CMP-sialic acid to GM3 to produce gangliosides GD3 and GT3. The encoded protein may be found in the Golgi apparatus and is a member of glycosyltransferase family 29. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2015]

ST8SIA1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.052715242).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ST8SIA1	NM_003034.4 linkuse as main transcript	c.8C>T	p.Pro3Leu	missense_variant	1/5	ENST00000396037.9
ST8SIA1	NM_001304450.2 linkuse as main transcript	c.-312C>T		5_prime_UTR_variant	1/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ST8SIA1	ENST00000396037.9 linkuse as main transcript	c.8C>T	p.Pro3Leu	missense_variant	1/5	1	NM_003034.4	P1	Q92185-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152046

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.000283

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000411

AC:

AN:

243436

Hom.:

AF XY:

0.0000226

AC XY:

AN XY:

132686

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.000386

Gnomad NFE exome

AF:

0.00000922

Gnomad OTH exome

AF:

0.000167

GnomAD4 exome

AF:

0.0000240

AC:

AN:

1459264

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

725742

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.000573

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152046

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74252

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000283

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.0000113

ExAC

AF:

0.0000662

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 25, 2023

The c.8C>T (p.P3L) alteration is located in exon 1 (coding exon 1) of the ST8SIA1 gene. This alteration results from a C to T substitution at nucleotide position 8, causing the proline (P) at amino acid position 3 to be replaced by a leucine (L). 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

0.12

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.48

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.082

T;.;T

Eigen

Benign

-0.33

Eigen_PC

Benign

-0.20

FATHMM_MKL

Benign

0.49

LIST_S2

Uncertain

0.89

D;D;D

M_CAP

Benign

0.016

MetaRNN

Benign

0.053

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

N;.;.

MutationTaster

Benign

0.99

D;D;D

PrimateAI

Uncertain

0.64

PROVEAN

Benign

0.13

N;N;N

REVEL

Benign

0.061

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

.;D;D

Polyphen

0.0

B;.;.

Vest4

0.23

MVP

0.30

MPC

0.44

ClinPred

0.21

GERP RS

2.5

Varity_R

0.078

gMVP

0.44

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