2-98636588-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_012214.3(MGAT4A):c.1330T>C(p.Phe444Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,612,756 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

MGAT4A
NM_012214.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.44

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 Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.801

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MGAT4A	NM_012214.3 linkuse as main transcript	c.1330T>C	p.Phe444Leu	missense_variant	13/16	ENST00000393487.6
MGAT4A	NM_001160154.2 linkuse as main transcript	c.946T>C	p.Phe316Leu	missense_variant	10/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MGAT4A	ENST00000393487.6 linkuse as main transcript	c.1330T>C	p.Phe444Leu	missense_variant	13/16	5	NM_012214.3	P1	Q9UM21-1
MGAT4A	ENST00000264968.7 linkuse as main transcript	c.1330T>C	p.Phe444Leu	missense_variant	12/15	1		P1	Q9UM21-1
MGAT4A	ENST00000409391.1 linkuse as main transcript	c.1330T>C	p.Phe444Leu	missense_variant	13/16	5		P1	Q9UM21-1
MGAT4A	ENST00000414521.6 linkuse as main transcript	c.946T>C	p.Phe316Leu	missense_variant	10/13	2			Q9UM21-2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152226

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:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251374

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135878

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1460530

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

726704

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000375

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152226

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74374

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:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.00000824

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

Apr 22, 2022

The c.1330T>C (p.F444L) alteration is located in exon 13 (coding exon 12) of the MGAT4A gene. This alteration results from a T to C substitution at nucleotide position 1330, causing the phenylalanine (F) at amino acid position 444 to be replaced by a leucine (L). 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

0.90

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Uncertain

0.10

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.42

T;T;.;T

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.74

FATHMM_MKL

Pathogenic

1.0

M_CAP

Benign

0.031

MetaRNN

Pathogenic

0.80

D;D;D;D

MetaSVM

Benign

-0.87

MutationAssessor

Uncertain

2.8

M;M;.;M

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Pathogenic

0.79

PROVEAN

Pathogenic

-4.4

D;D;D;D

REVEL

Uncertain

0.53

Sift

Benign

0.033

D;D;D;D

Sift4G

Benign

0.074

T;T;T;T

Polyphen

0.98

D;D;.;D

Vest4

0.91

MutPred

0.55

Gain of disorder (P = 0.1014);Gain of disorder (P = 0.1014);.;Gain of disorder (P = 0.1014);

MVP

0.50

MPC

0.63

ClinPred

0.95

GERP RS

5.6

Varity_R

0.49

gMVP

0.73

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