rs142375870

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBS1_Supporting

The NM_002361.4(MAG):c.1117A>C(p.Ser373Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000147 in 1,614,180 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. S373S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

MAG
NM_002361.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 4.41

Publications

4 publications found

Variant links:

Genes affected

MAG (HGNC:6783): (myelin associated glycoprotein) The protein encoded by this gene is a type I membrane protein and member of the immunoglobulin superfamily. It is thought to be involved in the process of myelination. It is a lectin that binds to sialylated glycoconjugates and mediates certain myelin-neuron cell-cell interactions. Three alternatively spliced transcripts encoding different isoforms have been described for this gene. [provided by RefSeq, Nov 2010]

MAG Gene-Disease associations (from GenCC):

complex hereditary spastic paraplegia
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hereditary spastic paraplegia 75
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

MAG links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0404177).

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.00023 (35/152296) while in subpopulation AMR AF = 0.00118 (18/15308). AF 95% confidence interval is 0.00076. There are 0 homozygotes in GnomAd4. There are 17 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
MAG	NM_002361.4 link	c.1117A>C	p.Ser373Arg	missense_variant	Exon 7 of 11	ENST00000392213.8	NP_002352.1
MAG	NM_001199216.2 link	c.1042A>C	p.Ser348Arg	missense_variant	Exon 7 of 11		NP_001186145.1
MAG	NM_080600.3 link	c.1117A>C	p.Ser373Arg	missense_variant	Exon 7 of 12		NP_542167.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
MAG	ENST00000392213.8 link	c.1117A>C	p.Ser373Arg	missense_variant	Exon 7 of 11	1	NM_002361.4	ENSP00000376048.2
MAG	ENST00000537831.2 link	c.1042A>C	p.Ser348Arg	missense_variant	Exon 7 of 11	1		ENSP00000440695.1
MAG	ENST00000361922.8 link	c.1117A>C	p.Ser373Arg	missense_variant	Exon 7 of 12	1		ENSP00000355234.4

Frequencies

GnomAD3 genomes

AF:

0.000230

AC:

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00118

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:

0.000162

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.000231

AC:

AN:

251468

AF XY:

0.000243

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000607

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000273

Gnomad OTH exome

AF:

0.000814

GnomAD4 exome

AF:

0.000138

AC:

202

AN:

1461884

Hom.:

Cov.:

AF XY:

0.000129

AC XY:

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33480

American (AMR)

AF:

0.000648

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00156

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000122

AC:

136

AN:

1112012

Other (OTH)

AF:

0.000430

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000230

AC:

AN:

152296

Hom.:

Cov.:

AF XY:

0.000228

AC XY:

AN XY:

74452

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41564

American (AMR)

AF:

0.00118

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000162

AC:

AN:

68034

Other (OTH)

AF:

0.00237

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000159

Hom.:

Bravo

AF:

0.000393

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000255

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 75

Uncertain:2

Dec 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces serine, which is neutral and polar, with arginine, which is basic and polar, at codon 373 of the MAG protein (p.Ser373Arg). This variant is present in population databases (rs142375870, gnomAD 0.06%). This missense change has been observed in individual(s) with hereditary spastic paraplegia (PMID: 28832565, 31402626). ClinVar contains an entry for this variant (Variation ID: 424677). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt MAG protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Dec 13, 2022

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

Hereditary spastic paraplegia

Uncertain:1

Mar 07, 2017

Unit for Genetic & Epidemiological Research on Neurological Disorders, Instituto de Investigação e Inovação em Saúde

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.26

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Uncertain

-0.060

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.12

T;.;.

Eigen

Uncertain

0.27

Eigen_PC

Uncertain

0.31

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.74

T;T;T

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.040

T;T;T

MetaSVM

Uncertain

-0.12

MutationAssessor

Benign

0.62

N;N;.

PhyloP100

4.4

PrimateAI

Benign

0.47

PROVEAN

Benign

-1.9

N;N;N

REVEL

Uncertain

0.47

Sift

Benign

0.068

T;T;T

Sift4G

Benign

0.079

T;T;T

Polyphen

0.97

D;.;.

Vest4

0.27

MutPred

0.31

Gain of solvent accessibility (P = 0.0365);Gain of solvent accessibility (P = 0.0365);.;

MVP

0.74

MPC

1.1

ClinPred

0.13

GERP RS

5.1

Varity_R

0.29

gMVP

0.81

Mutation Taster

=7/93

disease causing

(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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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