dbSNP rs7726005: MGAT1:p.Arg223Leu (chr5-180792304-C-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

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

The NM_002406.4(MGAT1):c.668G>T(p.Arg223Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000385 in 1,609,558 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R223Q) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000028 ( 0 hom. )

Consequence

MGAT1
NM_002406.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.16

Variant links:

Genes affected

MGAT1 (HGNC:7044): (alpha-1,3-mannosyl-glycoprotein 2-beta-N-acetylglucosaminyltransferase) There are believed to be over 100 different glycosyltransferases involved in the synthesis of protein-bound and lipid-bound oligosaccharides. UDP-N-acetylglucosamine:alpha-3-D-mannoside beta-1,2-N-acetylglucosaminyltransferase I is a medial-Golgi enzyme essential for the synthesis of hybrid and complex N-glycans. The protein, encoded by a single exon, shows typical features of a type II transmembrane protein. The protein is believed to be essential for normal embryogenesis. Several variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

MGAT1 links:

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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=0.047156096).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MGAT1	NM_002406.4 link	c.668G>T	p.Arg223Leu	missense_variant	Exon 2 of 2	ENST00000307826.5	NP_002397.2	P26572

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MGAT1	ENST00000307826.5 link	c.668G>T	p.Arg223Leu	missense_variant	Exon 2 of 2	1	NM_002406.4	ENSP00000311888.4		P26572

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00124

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:

0.0000147

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000203

AC:

AN:

245866

Hom.:

AF XY:

0.0000149

AC XY:

AN XY:

133812

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000580

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:

0.0000182

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.0000281

AC:

AN:

1457276

Hom.:

Cov.:

AF XY:

0.0000207

AC XY:

AN XY:

724164

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000896

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:

0.0000270

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000138

AC:

AN:

152282

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00124

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.00000289

Hom.:

1641

Bravo

AF:

0.000223

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.27

CADD

Benign

DANN

Benign

0.92

DEOGEN2

Benign

0.27

T;T;T;T;T

Eigen

Benign

-0.50

Eigen_PC

Benign

-0.31

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.86

.;.;.;D;.

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.047

T;T;T;T;T

MetaSVM

Benign

-0.47

MutationAssessor

Benign

0.37

N;N;N;N;N

PrimateAI

Benign

0.48

PROVEAN

Benign

0.78

N;N;N;N;N

REVEL

Benign

0.23

Sift

Benign

0.40

T;T;T;T;T

Sift4G

Benign

0.36

T;T;T;T;T

Polyphen

0.0

B;B;B;B;B

Vest4

0.25

MutPred

0.51

Loss of solvent accessibility (P = 0.0299);Loss of solvent accessibility (P = 0.0299);Loss of solvent accessibility (P = 0.0299);Loss of solvent accessibility (P = 0.0299);Loss of solvent accessibility (P = 0.0299);

MVP

0.24

MPC

0.98

ClinPred

0.079

GERP RS

5.6

Varity_R

0.062

gMVP

0.59

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over