Genetic Variant MDGA2:p.Val626Ile (chr14-46957587-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_001113498.3(MDGA2):c.1876G>A(p.Val626Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000626 in 1,614,160 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00030 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

MDGA2
NM_001113498.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.634

Publications

1 publications found

Variant links:

Genes affected

MDGA2 (HGNC:19835): (MAM domain containing glycosylphosphatidylinositol anchor 2) Predicted to be involved in regulation of presynapse assembly; regulation of synaptic membrane adhesion; and spinal cord motor neuron differentiation. Predicted to act upstream of or within neuron migration and pattern specification process. Predicted to be located in extracellular region and plasma membrane. Predicted to be active in GABA-ergic synapse and glutamatergic synapse. [provided by Alliance of Genome Resources, Apr 2022]

MDGA2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.015351683).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MDGA2	NM_001113498.3 link	c.1876G>A	p.Val626Ile	missense_variant	Exon 9 of 17	ENST00000399232.8	NP_001106970.4	Q7Z553-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MDGA2	ENST00000399232.8 link	c.1876G>A	p.Val626Ile	missense_variant	Exon 9 of 17	1	NM_001113498.3	ENSP00000382178.4	Q7Z553-3
MDGA2	ENST00000357362.7 link	c.982G>A	p.Val328Ile	missense_variant	Exon 9 of 17	5		ENSP00000349925.3	Q7Z553-2
MDGA2	ENST00000557238.5 link	n.*254G>A		non_coding_transcript_exon_variant	Exon 9 of 14	5		ENSP00000452593.1	G3V5Z1
MDGA2	ENST00000557238.5 link	n.*254G>A		3_prime_UTR_variant	Exon 9 of 14	5		ENSP00000452593.1	G3V5Z1

Frequencies

GnomAD3 genomes

AF:

0.000296

AC:

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00106

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000842

AC:

AN:

249492

AF XY:

0.0000813

show subpopulations

Gnomad AFR exome

AF:

0.00103

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000383

AC:

AN:

1461862

Hom.:

Cov.:

AF XY:

0.0000454

AC XY:

AN XY:

727232

show subpopulations

African (AFR)

AF:

0.000836

AC:

AN:

33478

American (AMR)

AF:

0.0000671

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000162

AC:

AN:

1111984

Other (OTH)

AF:

0.0000166

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000295

AC:

AN:

152298

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74482

show subpopulations

African (AFR)

AF:

0.00106

AC:

AN:

41560

American (AMR)

AF:

0.0000654

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000394

Hom.:

Bravo

AF:

0.000370

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000765

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000124

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 08, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1669G>A (p.D557N) alteration is located in exon 8 (coding exon 8) of the MDGA2 gene. This alteration results from a G to A substitution at nucleotide position 1669, causing the aspartic acid (D) at amino acid position 557 to be replaced by an asparagine (N). 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

0.063

BayesDel_addAF

Benign

-0.57

BayesDel_noAF

Benign

-0.64

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.019

.;.;T

Eigen

Benign

-0.31

Eigen_PC

Benign

-0.15

FATHMM_MKL

Benign

0.61

LIST_S2

Benign

0.78

T;T;T

M_CAP

Benign

0.0030

MetaRNN

Benign

0.015

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

.;.;L

PhyloP100

0.63

PrimateAI

Benign

0.47

PROVEAN

Benign

-0.040

N;N;.

REVEL

Benign

0.027

Sift

Benign

0.44

T;T;.

Sift4G

Benign

0.38

.;T;.

Polyphen

0.029

.;.;B

Vest4

0.18

MVP

0.23

MPC

0.14

ClinPred

0.029

GERP RS

4.4

Varity_R

0.029

gMVP

0.45

Mutation Taster

=93/7

polymorphism

(source)

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

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14-46957587-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over