Genetic Variant MAG:p.Val442Leu (chr19-35309966-G-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_002361.4(MAG):c.1324G>C(p.Val442Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,668 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 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. V442M) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MAG
NM_002361.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.74

Publications

0 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:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20085186).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002361.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MAG	NM_002361.4	MANE Select	c.1324G>C	p.Val442Leu	missense	Exon 8 of 11	NP_002352.1	P20916-1
MAG	NM_001199216.2		c.1249G>C	p.Val417Leu	missense	Exon 8 of 11	NP_001186145.1	P20916-3
MAG	NM_080600.3		c.1324G>C	p.Val442Leu	missense	Exon 8 of 12	NP_542167.1	P20916-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MAG	ENST00000392213.8	TSL:1 MANE Select	c.1324G>C	p.Val442Leu	missense	Exon 8 of 11	ENSP00000376048.2	P20916-1
MAG	ENST00000537831.2	TSL:1	c.1249G>C	p.Val417Leu	missense	Exon 8 of 11	ENSP00000440695.1	P20916-3
MAG	ENST00000361922.8	TSL:1	c.1324G>C	p.Val442Leu	missense	Exon 8 of 12	ENSP00000355234.4	P20916-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461668

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727158

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53336

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111912

Other (OTH)

AF:

0.00

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.24

BayesDel_addAF

Benign

-0.082

BayesDel_noAF

Benign

-0.35

CADD

Benign

(source)

DANN

Benign

0.79

DEOGEN2

Benign

0.050

Eigen

Benign

-0.28

Eigen_PC

Benign

-0.075

FATHMM_MKL

Uncertain

0.77

LIST_S2

Uncertain

0.86

M_CAP

Benign

0.011

MetaRNN

Benign

0.20

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.55

PhyloP100

3.7

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

1.2

REVEL

Benign

0.11

Sift

Benign

0.89

Sift4G

Benign

0.47

Polyphen

0.066

Vest4

0.43

MutPred

0.45

Loss of catalytic residue at V442 (P = 0.0588)

MVP

0.75

MPC

0.43

ClinPred

0.68

GERP RS

4.8

Varity_R

0.065

gMVP

0.75

Mutation Taster

=87/13

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over