NM_032806.6:c.1162C>T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BS1_Supporting

The NM_032806.6(POMGNT2):c.1162C>T(p.Leu388Phe) variant causes a missense change. The variant allele was found at a frequency of 0.000511 in 1,614,202 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00030 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00053 ( 0 hom. )

Consequence

POMGNT2
NM_032806.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 6.81

Variant links:

Genes affected

POMGNT2 (HGNC:25902): (protein O-linked mannose N-acetylglucosaminyltransferase 2 (beta 1,4-)) This gene encodes a protein with glycosyltransferase activity although its function is not currently known. [provided by RefSeq, Sep 2012]

POMGNT2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.000533 (779/1461866) while in subpopulation NFE AF= 0.000655 (728/1112000). AF 95% confidence interval is 0.000615. There are 0 homozygotes in gnomad4_exome. There are 366 alleles in male gnomad4_exome subpopulation. Median coverage is 37. 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 rank	MANE	Protein	UniProt
POMGNT2	NM_032806.6 link	c.1162C>T	p.Leu388Phe	missense_variant	Exon 2 of 2	ENST00000344697.3	NP_116195.2	Q8NAT1A0A024R2P4
POMGNT2	XM_005265515.4 link	c.1162C>T	p.Leu388Phe	missense_variant	Exon 3 of 3		XP_005265572.1	Q8NAT1A0A024R2P4
POMGNT2	XM_011534163.3 link	c.1162C>T	p.Leu388Phe	missense_variant	Exon 3 of 3		XP_011532465.1	Q8NAT1A0A024R2P4
POMGNT2	XM_017007353.2 link	c.1162C>T	p.Leu388Phe	missense_variant	Exon 4 of 4		XP_016862842.1	Q8NAT1A0A024R2P4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POMGNT2	ENST00000344697.3 link	c.1162C>T	p.Leu388Phe	missense_variant	Exon 2 of 2	1	NM_032806.6	ENSP00000344125.2		Q8NAT1

Frequencies

GnomAD3 genomes

AF:

0.000302

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000654

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:

0.000382

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.000334

AC:

AN:

251380

Hom.:

AF XY:

0.000324

AC XY:

AN XY:

135868

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.000347

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:

0.000545

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.000533

AC:

779

AN:

1461866

Hom.:

Cov.:

AF XY:

0.000503

AC XY:

366

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.000335

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000374

Gnomad4 NFE exome

AF:

0.000655

Gnomad4 OTH exome

AF:

0.000480

GnomAD4 genome

AF:

0.000302

AC:

AN:

152336

Hom.:

Cov.:

AF XY:

0.000295

AC XY:

AN XY:

74484

show subpopulations

Gnomad4 AFR

AF:

0.000168

Gnomad4 AMR

AF:

0.000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000382

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000536

Hom.:

Bravo

AF:

0.000359

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00105

AC:

ExAC

AF:

0.000296

AC:

EpiCase

AF:

0.000600

EpiControl

AF:

0.000356

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Sep 02, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Mar 01, 2023

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases

Uncertain:1

Oct 06, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1162C>T (p.L388F) alteration is located in exon 2 (coding exon 1) of the POMGNT2 gene. This alteration results from a C to T substitution at nucleotide position 1162, causing the leucine (L) at amino acid position 388 to be replaced by a phenylalanine (F). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type a, 8

Uncertain:1

Oct 13, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 388 of the POMGNT2 protein (p.Leu388Phe). This variant is present in population databases (rs139060322, gnomAD 0.05%). This variant has not been reported in the literature in individuals affected with POMGNT2-related conditions. ClinVar contains an entry for this variant (Variation ID: 473272). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt POMGNT2 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.55

BayesDel_addAF

Pathogenic

0.19

BayesDel_noAF

Pathogenic

0.39

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.68

D;D

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.84

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

.;D

M_CAP

Uncertain

0.11

MetaRNN

Uncertain

0.50

T;T

MetaSVM

Uncertain

0.62

MutationAssessor

Pathogenic

3.4

M;M

PrimateAI

Uncertain

0.62

PROVEAN

Uncertain

-2.6

D;D

REVEL

Pathogenic

0.76

Sift

Uncertain

0.0010

D;D

Sift4G

Uncertain

0.0060

D;D

Polyphen

1.0

D;D

Vest4

0.60

MVP

0.83

MPC

0.96

ClinPred

0.25

GERP RS

5.5

Varity_R

0.60

gMVP

0.76

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