2-98675089-T-C

Variant summary

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

The NM_012214.3(MGAT4A):c.349A>G(p.Lys117Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000192 in 1,611,958 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000018 ( 0 hom. )

Consequence

MGAT4A
NM_012214.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.87

Variant links:

Genes affected

MGAT4A (HGNC:7047): (alpha-1,3-mannosyl-glycoprotein 4-beta-N-acetylglucosaminyltransferase A) This gene encodes a key glycosyltransferase that regulates the formation of tri- and multiantennary branching structures in the Golgi apparatus. The encoded protein, in addition to the related isoenzyme B, catalyzes the transfer of N-acetylglucosamine (GlcNAc) from UDP-GlcNAc in a beta-1,4 linkage to the Man-alpha-1,3-Man-beta-1,4-GlcNAc arm of R-Man-alpha-1,6(GlcNAc-beta-1,2-Man-alpha-1,3)Man-beta-1,4-GlcNAc-beta-1,4-GlcNAc-beta-1-Asn. The encoded protein may play a role in regulating the availability of serum glycoproteins, oncogenesis, and differentiation. [provided by RefSeq, Jul 2008]

MGAT4A links:

Genome browser will be placed here

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=0.021196485).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MGAT4A	NM_012214.3 linkuse as main transcript	c.349A>G	p.Lys117Glu	missense_variant	4/16	ENST00000393487.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MGAT4A	ENST00000393487.6 linkuse as main transcript	c.349A>G	p.Lys117Glu	missense_variant	4/16	5	NM_012214.3	P1	Q9UM21-1
MGAT4A	ENST00000264968.7 linkuse as main transcript	c.349A>G	p.Lys117Glu	missense_variant	3/15	1		P1	Q9UM21-1
MGAT4A	ENST00000409391.1 linkuse as main transcript	c.349A>G	p.Lys117Glu	missense_variant	4/16	5		P1	Q9UM21-1
MGAT4A	ENST00000484936.5 linkuse as main transcript	n.612A>G		non_coding_transcript_exon_variant	4/5	5

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152232

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:

0.000961

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

GnomAD3 exomes

AF:

0.0000963

AC:

AN:

249092

Hom.:

AF XY:

0.0000966

AC XY:

AN XY:

134510

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00131

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000178

AC:

AN:

1459726

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

726048

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000580

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74398

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000961

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000378

ExAC

AF:

0.0000906

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

Oct 25, 2023

The c.349A>G (p.K117E) alteration is located in exon 4 (coding exon 3) of the MGAT4A gene. This alteration results from a A to G substitution at nucleotide position 349, causing the lysine (K) at amino acid position 117 to be replaced by a glutamic acid (E). 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

0.074

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.57

Cadd

Benign

Dann

Benign

0.88

DEOGEN2

Benign

0.024

T;T;T

Eigen

Benign

-0.85

Eigen_PC

Benign

-0.69

FATHMM_MKL

Uncertain

0.85

M_CAP

Benign

0.0060

MetaRNN

Benign

0.021

T;T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

0.80

N;N;N

MutationTaster

Benign

0.70

D;D;D

PrimateAI

Benign

0.36

PROVEAN

Benign

0.42

N;N;N

REVEL

Benign

0.029

Sift

Benign

0.68

T;T;T

Sift4G

Benign

0.75

T;T;T

Polyphen

0.0050

B;B;B

Vest4

0.25

MutPred

0.28

Loss of methylation at K117 (P = 0.0152);Loss of methylation at K117 (P = 0.0152);Loss of methylation at K117 (P = 0.0152);

MVP

0.32

MPC

0.47

ClinPred

0.032

GERP RS

-2.4

Varity_R

0.059

gMVP

0.25

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