chr14-47131733-A-C

Position:

• chr14-47131733-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001113498.3(MDGA2):​c.906T>G​(p.Phe302Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MDGA2 NM_001113498.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.01

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MDGA2	NM_001113498.3	c.906T>G	p.Phe302Leu	missense_variant	5/17	ENST00000399232.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MDGA2	ENST00000399232.8	c.906T>G	p.Phe302Leu	missense_variant	5/17	1	NM_001113498.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 18, 2021

The c.699T>G (p.N233K) alteration is located in exon 4 (coding exon 4) of the MDGA2 gene. This alteration results from a T to G substitution at nucleotide position 699, causing the asparagine (N) at amino acid position 233 to be replaced by a lysine (K). 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	0.98
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.070
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.031	.;.;T
Eigen	Uncertain	0.25
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Benign	0.81	T;D;T
M_CAP	Benign	0.020	T
MetaRNN	Uncertain	0.57	D;D;D
MetaSVM	Benign	-0.82	T
MutationAssessor	Benign	1.8	.;.;L
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	-2.2	N;N;.
REVEL	Benign	0.23
Sift	Benign	0.56	T;D;.
Sift4G	Pathogenic	0.0	.;D;.
Polyphen		0.87	.;.;P
Vest4		0.89
MutPred		0.38		.;.;Gain of catalytic residue at V231 (P = 0.004);
MVP		0.85
MPC		0.77
ClinPred		0.97	D
GERP RS		5.3
Varity_R		0.15
gMVP		0.70

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr14-47600936;