rs767886169

Positions:

chr19-35311947-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 4P and 3B. PM1PM2BP4_ModerateBS1_Supporting

The NM_002361.4(MAG):c.1646C>T(p.Ser549Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000124 in 1,613,066 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict 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. S549S) has been classified as Benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

MAG
NM_002361.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.93

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM1

In a modified_residue Phosphoserine (size 0) in uniprot entity MAG_HUMAN

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13775948).

BS1

Variant frequency is greater than expected in population afr. gnomad4_exome allele frequency = 0.0000123 (18/1460836) while in subpopulation AFR AF= 0.0000598 (2/33434). AF 95% confidence interval is 0.00000991. There are 0 homozygotes in gnomad4_exome. There are 14 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
MAG	NM_002361.4 linkuse as main transcript	c.1646C>T	p.Ser549Leu	missense_variant	10/11	ENST00000392213.8
MAG	NM_001199216.2 linkuse as main transcript	c.1571C>T	p.Ser524Leu	missense_variant	10/11
MAG	NM_080600.3 linkuse as main transcript	c.1646C>T	p.Ser549Leu	missense_variant	10/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MAG	ENST00000392213.8 linkuse as main transcript	c.1646C>T	p.Ser549Leu	missense_variant	10/11	1	NM_002361.4	P1	P20916-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152230

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000121

AC:

AN:

248584

Hom.:

AF XY:

0.00000744

AC XY:

AN XY:

134478

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

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:

0.0000179

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000123

AC:

AN:

1460836

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

726668

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000900

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152230

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74374

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

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:

0.000478

Alfa

AF:

0.0000936

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 75

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

May 03, 2019

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. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This variant has been observed in the heterozygous state in an individual affected with hereditary spastic paraplegia (HSP) (PMID:¬†28832565). ClinVar contains an entry for this variant (Variation ID:¬†424680). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the ExAC database. This sequence change replaces serine with leucine at codon 549 of the MAG protein (p.Ser549Leu). The serine residue is moderately conserved and there is a large physicochemical difference between serine and leucine. -

Hereditary spastic paraplegia

Uncertain:1

Uncertain significance, criteria provided, single submitter

research

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

Mar 07, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.089

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.33

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.12

T;.;.

Eigen

Benign

-0.27

Eigen_PC

Benign

-0.067

FATHMM_MKL

Benign

0.53

LIST_S2

Uncertain

0.89

D;D;D

M_CAP

Benign

0.023

MetaRNN

Benign

0.14

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.34

N;N;.

MutationTaster

Benign

0.91

N;N;N

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.4

N;N;N

REVEL

Benign

0.096

Sift

Benign

0.20

T;T;T

Sift4G

Benign

0.40

T;T;T

Polyphen

0.047

B;.;.

Vest4

0.31

MutPred

0.31

Loss of disorder (P = 0.0112);Loss of disorder (P = 0.0112);.;

MVP

0.41

MPC

0.39

ClinPred

0.22

GERP RS

4.2

Varity_R

0.11

gMVP

0.26

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.18

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over