Genetic Variant ST6GALNAC5:p.Arg109Trp (chr1-77044267-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_030965.3(ST6GALNAC5):c.325C>T(p.Arg109Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000031 in 1,613,786 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

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

Exomes 𝑓: 0.000033 ( 0 hom. )

Consequence

ST6GALNAC5
NM_030965.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.196

Variant links:

Genes affected

ST6GALNAC5 (HGNC:19342): (ST6 N-acetylgalactosaminide alpha-2,6-sialyltransferase 5) The protein encoded by this gene is a Golgi type II transmembrane glycosyltransferase. The encoded protein catalyzes the transfer of sialic acid to cell surface proteins to modulate cell-cell interactions. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2016]

ST6GALNAC5 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.25442654).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ST6GALNAC5	NM_030965.3 link	c.325C>T	p.Arg109Trp	missense_variant	Exon 3 of 5	ENST00000477717.6	NP_112227.1	Q9BVH7
ST6GALNAC5	NM_001320273.2 link	c.262-5991C>T		intron_variant	Intron 2 of 3		NP_001307202.1	B4DV27
ST6GALNAC5	NM_001320274.2 link	c.262-18708C>T		intron_variant	Intron 2 of 2		NP_001307203.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ST6GALNAC5	ENST00000477717.6 link	c.325C>T	p.Arg109Trp	missense_variant	Exon 3 of 5	1	NM_030965.3	ENSP00000417583.1	Q9BVH7
ST6GALNAC5	ENST00000318803.6 link	n.325C>T		non_coding_transcript_exon_variant	Exon 3 of 5	5		ENSP00000436263.1	F2Z2C8
ST6GALNAC5	ENST00000488940.1 link	n.128C>T		non_coding_transcript_exon_variant	Exon 2 of 3	5

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152116

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:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000319

AC:

AN:

250950

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135716

show subpopulations

Gnomad AFR exome

AF:

0.0000616

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:

0.00

Gnomad NFE exome

AF:

0.0000617

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000328

AC:

AN:

1461670

Hom.:

Cov.:

AF XY:

0.0000289

AC XY:

AN XY:

727138

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

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:

0.00

Gnomad4 NFE exome

AF:

0.0000387

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152116

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74290

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:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 23, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.325C>T (p.R109W) alteration is located in exon 3 (coding exon 3) of the ST6GALNAC5 gene. This alteration results from a C to T substitution at nucleotide position 325, causing the arginine (R) at amino acid position 109 to be replaced by a tryptophan (W). 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

-0.29

BayesDel_noAF

Benign

-0.47

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.18

Eigen

Benign

-0.030

Eigen_PC

Benign

-0.15

FATHMM_MKL

Benign

0.076

LIST_S2

Benign

0.32

M_CAP

Benign

0.021

MetaRNN

Benign

0.25

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.0

PrimateAI

Benign

0.29

PROVEAN

Uncertain

-3.3

REVEL

Benign

0.084

Sift

Uncertain

0.011

Sift4G

Uncertain

0.013

Polyphen

0.96

Vest4

0.34

MutPred

0.52

Loss of disorder (P = 0.0183);

MVP

0.068

MPC

0.87

ClinPred

0.58

GERP RS

1.4

Varity_R

0.13

gMVP

0.42

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