1-230067398-G-C

Position:

chr1-230067398-G-C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBS1_Supporting

The NM_004481.5(GALNT2):c.118G>C(p.Gly40Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000642 in 1,246,932 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict 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: 0.0000055 ( 0 hom. )

Consequence

GALNT2
NM_004481.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.302

Variant links:

Genes affected

GALNT2 (HGNC:4124): (polypeptide N-acetylgalactosaminyltransferase 2) This gene encodes a member of the glycosyltransferase 2 protein family. Members of this family initiate mucin-type O-glycoslation of peptides in the Golgi apparatus. The encoded protein may be involved in O-linked glycosylation of the immunoglobulin A1 hinge region. This gene may influence triglyceride levels, and may be involved Type 2 diabetes, as well as several types of cancer. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

GALNT2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.23405755).

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.0000133 (2/150788) while in subpopulation EAS AF= 0.000392 (2/5100). AF 95% confidence interval is 0.0000693. There are 0 homozygotes in gnomad4. There are 2 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
GALNT2	NM_004481.5 linkuse as main transcript	c.118G>C	p.Gly40Arg	missense_variant	1/16	ENST00000366672.5
GALNT2	NM_001291866.2 linkuse as main transcript	c.12+9320G>C		intron_variant
GALNT2	NR_120373.2 linkuse as main transcript	n.161G>C		non_coding_transcript_exon_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GALNT2	ENST00000366672.5 linkuse as main transcript	c.118G>C	p.Gly40Arg	missense_variant	1/16	1	NM_004481.5	P1	Q10471-1
GALNT2	ENST00000488903.1 linkuse as main transcript	n.140G>C		non_coding_transcript_exon_variant	1/2	2
GALNT2	ENST00000494106.1 linkuse as main transcript	n.89+9320G>C		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes

AF:

0.0000133

AC:

AN:

150680

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:

0.000391

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1096144

Hom.:

Cov.:

AF XY:

0.00000754

AC XY:

AN XY:

530286

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000171

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000217

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000133

AC:

AN:

150788

Hom.:

Cov.:

AF XY:

0.0000271

AC XY:

AN XY:

73678

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000392

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000302

ExAC

AF:

0.0000365

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 19, 2023

The c.118G>C (p.G40R) alteration is located in exon 1 (coding exon 1) of the GALNT2 gene. This alteration results from a G to C substitution at nucleotide position 118, causing the glycine (G) at amino acid position 40 to be replaced by an arginine (R). 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

0.18

BayesDel_addAF

Benign

-0.082

BayesDel_noAF

Benign

-0.36

CADD

Benign

DANN

Benign

0.74

DEOGEN2

Benign

0.015

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.26

FATHMM_MKL

Benign

0.40

LIST_S2

Benign

0.54

M_CAP

Pathogenic

0.96

MetaRNN

Benign

0.23

MetaSVM

Benign

-0.93

MutationAssessor

Benign

0.0

MutationTaster

Benign

0.73

D;D;D

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-0.17

REVEL

Benign

0.20

Sift

Benign

0.62

Sift4G

Benign

0.56

Polyphen

0.72

Vest4

0.23

MutPred

0.25

Loss of relative solvent accessibility (P = 0.0676);

MVP

0.83

MPC

0.65

ClinPred

0.24

GERP RS

2.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

3.0

Varity_R

0.15

gMVP

0.57

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