rs551423795

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PM1PM2PP5BP4

The NM_005592.4(MUSK):c.308A>G(p.Asn103Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000186 in 1,613,866 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 Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. N103N) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000018 ( 0 hom. )

Consequence

MUSK
NM_005592.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:3U:1

Conservation

PhyloP100: 8.52

Variant links:

Genes affected

MUSK (HGNC:7525): (muscle associated receptor tyrosine kinase) This gene encodes a muscle-specific tyrosine kinase receptor. The encoded protein may play a role in clustering of the acetylcholine receptor in the postsynaptic neuromuscular junction. Mutations in this gene have been associated with congenital myasthenic syndrome. Alternatively spliced transcript variants have been described.[provided by RefSeq, Oct 2009]

MUSK links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM1

In a domain Ig-like 1 (size 88) in uniprot entity MUSK_HUMAN there are 8 pathogenic changes around while only 1 benign (89%) in NM_005592.4

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 9-110687218-A-G is Pathogenic according to our data. Variant chr9-110687218-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 218372.We mark this variant Likely_pathogenic, oryginal submissions are: {Pathogenic=1, Likely_pathogenic=2, Uncertain_significance=1}. Variant chr9-110687218-A-G is described in Lovd as [Likely_pathogenic].

BP4

Computational evidence support a benign effect (MetaRNN=0.4228711).. Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MUSK	NM_005592.4 linkuse as main transcript	c.308A>G	p.Asn103Ser	missense_variant	3/15	ENST00000374448.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MUSK	ENST00000374448.9 linkuse as main transcript	c.308A>G	p.Asn103Ser	missense_variant	3/15	5	NM_005592.4	P4	O15146-1
MUSK	ENST00000416899.7 linkuse as main transcript	c.308A>G	p.Asn103Ser	missense_variant	3/14	5		A1
MUSK	ENST00000189978.10 linkuse as main transcript	c.308A>G	p.Asn103Ser	missense_variant	3/14	5			O15146-2
MUSK	ENST00000374439.1 linkuse as main transcript	c.2A>G	p.Asn1Ser	missense_variant	1/4	5

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152134

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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

GnomAD3 exomes

AF:

0.0000241

AC:

AN:

249236

Hom.:

AF XY:

0.0000296

AC XY:

AN XY:

135210

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

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:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000185

AC:

AN:

1461614

Hom.:

Cov.:

AF XY:

0.0000206

AC XY:

AN XY:

727084

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000894

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000189

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152252

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000329

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000331

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:3Uncertain:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Fetal akinesia deformation sequence 1

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Equipe Genetique des Anomalies du Developpement, Université de Bourgogne

Nov 16, 2017

- -

Fetal akinesia deformation sequence 1;C4225368:Congenital myasthenic syndrome 9

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Jan 02, 2024

This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 103 of the MUSK protein (p.Asn103Ser). This variant is present in population databases (rs551423795, gnomAD 0.01%). This missense change has been observed in individual(s) with congenital myasthenic syndrome (PMID: 25900532, 32253145). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 218372). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt MUSK protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. -

Congenital myasthenic syndrome 9

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

research

Scripps Translational Science Institute, Scripps Health and The Scripps Research Institute

Dec 15, 2015

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Oct 12, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.35

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.23

Cadd

Pathogenic

Dann

Pathogenic

1.0

DEOGEN2

Benign

0.15

T;.;.;.;.

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.86

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.97

D;D;D;D;D

M_CAP

Benign

0.038

MetaRNN

Benign

0.27

T;T;T;T;T

MetaSVM

Benign

-0.33

MutationAssessor

Uncertain

2.3

M;.;M;.;.

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Benign

0.48

PROVEAN

Benign

-1.6

N;N;N;.;.

REVEL

Benign

0.27

Sift

Uncertain

0.0050

D;D;D;.;.

Sift4G

Uncertain

0.031

D;T;T;T;D

Polyphen

1.0

D;.;.;.;.

Vest4

0.98

MVP

0.74

MPC

0.35

ClinPred

0.78

GERP RS

6.0

Varity_R

0.44

gMVP

0.88

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

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