Genetic Variant ST6GAL1:p.Gly385Asp (chr3-187075736-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_173216.2(ST6GAL1):c.1154G>A(p.Gly385Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000545 in 1,614,130 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000059 ( 1 hom. )

Consequence

ST6GAL1
NM_173216.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.93

Publications

0 publications found

Variant links:

Genes affected

ST6GAL1 (HGNC:10860): (ST6 beta-galactoside alpha-2,6-sialyltransferase 1) This gene encodes a member of glycosyltransferase family 29. The encoded protein is a type II membrane protein that catalyzes the transfer of sialic acid from CMP-sialic acid to galactose-containing substrates. The protein, which is normally found in the Golgi but can be proteolytically processed to a soluble form, is involved in the generation of the cell-surface carbohydrate determinants and differentiation antigens HB-6, CD75, and CD76. This gene has been incorrectly referred to as CD75. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2017]

ST6GAL1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 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
ST6GAL1	NM_173216.2 link	c.1154G>A	p.Gly385Asp	missense_variant	Exon 8 of 8	ENST00000169298.8	NP_775323.1	P15907-1
ST6GAL1	NM_001353916.2 link	c.1154G>A	p.Gly385Asp	missense_variant	Exon 6 of 6		NP_001340845.1
ST6GAL1	NM_003032.3 link	c.1154G>A	p.Gly385Asp	missense_variant	Exon 7 of 7		NP_003023.1	P15907-1
ST6GAL1	NM_173217.2 link	c.461G>A	p.Gly154Asp	missense_variant	Exon 7 of 7		NP_775324.1	P15907-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ST6GAL1	ENST00000169298.8 link	c.1154G>A	p.Gly385Asp	missense_variant	Exon 8 of 8	1	NM_173216.2	ENSP00000169298.3		P15907-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152242

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000676

AC:

AN:

251454

AF XY:

0.0000441

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000149

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000588

AC:

AN:

1461888

Hom.:

Cov.:

AF XY:

0.0000536

AC XY:

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

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:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000562

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000728

AC:

AN:

1112008

Other (OTH)

AF:

0.0000331

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.465

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74380

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41464

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5206

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68046

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000580

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.000115

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 30, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1154G>A (p.G385D) alteration is located in exon 8 (coding exon 5) of the ST6GAL1 gene. This alteration results from a G to A substitution at nucleotide position 1154, causing the glycine (G) at amino acid position 385 to be replaced by an aspartic acid (D). 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

Pathogenic

0.59

BayesDel_addAF

Uncertain

0.099

BayesDel_noAF

Pathogenic

0.14

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.46

T;.;T

Eigen

Pathogenic

0.96

Eigen_PC

Pathogenic

0.91

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.89

.;D;D

M_CAP

Benign

0.045

MetaRNN

Uncertain

0.73

D;D;D

MetaSVM

Benign

-0.35

MutationAssessor

Uncertain

2.7

M;.;M

PhyloP100

7.9

PrimateAI

Uncertain

0.67

PROVEAN

Pathogenic

-5.7

D;D;D

REVEL

Uncertain

0.58

Sift

Uncertain

0.0020

D;D;D

Sift4G

Uncertain

0.0080

D;D;D

Polyphen

1.0

D;.;D

Vest4

0.64

MVP

0.37

MPC

0.89

ClinPred

0.90

GERP RS

5.7

Varity_R

0.88

gMVP

0.97

Mutation Taster

=27/73

disease causing

(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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3-187075736-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over