VCV000702804.13 - ClinVar

NM_005592.4(MUSK):c.549A>G (p.Glu183=)

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(4)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Conflicting classifications of pathogenicity
Uncertain significance(1); Likely benign(2)

criteria provided, conflicting classifications

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_005592.4(MUSK):c.549A>G (p.Glu183=)

Variation ID: 702804 Accession: VCV000702804.13

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 9q31.3 9: 110697387 (GRCh38) [ NCBI UCSC ] 9: 113459667 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Dec 17, 2019	Oct 8, 2024	Oct 11, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_005592.4:c.549A>G MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_005583.1:p.Glu183=	synonymous
NM_001166280.2:c.549A>G	NP_001159752.1:p.Glu183=	synonymous
NM_001166281.2:c.549A>G	NP_001159753.1:p.Glu183=	synonymous
NC_000009.12:g.110697387A>G
NC_000009.11:g.113459667A>G
NG_016016.2:g.33597A>G

... more HGVS ... less HGVS

Protein change

Other names

Canonical SPDI

NC_000009.12:110697386:A:G

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

0.00040 (G)

Allele frequency Help The frequency of the allele represented by this VCV record.

Exome Aggregation Consortium (ExAC) 0.00007

The Genome Aggregation Database (gnomAD), exomes 0.00010

The Genome Aggregation Database (gnomAD) 0.00022

NHLBI Exome Sequencing Project (ESP) Exome Variant Server 0.00025

1000 Genomes Project 30x 0.00031

1000 Genomes Project 0.00040

Trans-Omics for Precision Medicine (TOPMed) 0.00048

Links

dbSNP: rs369254308 VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
MUSK		-	-	GRCh38 GRCh37	803	842

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Congenital myasthenic syndrome 9	Uncertain significance (1)	criteria provided, single submitter	Jan 13, 2018	RCV001168570.11
Congenital myasthenic syndrome 9 Fetal akinesia deformation sequence 1	Likely benign (1)	criteria provided, single submitter	Oct 24, 2022	RCV001425565.14
not specified	Likely benign (1)	criteria provided, single submitter	Oct 11, 2023	RCV003396522.1
MUSK-related disorder	Likely benign (1)	no assertion criteria provided	May 13, 2019	RCV004538309.2

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (Jan 13, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	Congenital myasthenic syndrome 9 Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV001331173.1 First in ClinVar: May 31, 2020 Last updated: May 31, 2020	Comment: This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated … (more) This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. (less)
Likely benign (Oct 24, 2022)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Congenital myasthenic syndrome 9 Fetal akinesia deformation sequence 1 Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV001628196.4 First in ClinVar: May 23, 2021 Last updated: Apr 09, 2023
Likely benign (Oct 11, 2023)	criteria provided, single submitter (LabCorp Variant Classification Summary - May 2015) Method: clinical testing	not specified Affected status: unknown Allele origin: germline	Women's Health and Genetics/Laboratory Corporation of America, LabCorp Accession: SCV004122759.1 First in ClinVar: Nov 20, 2023 Last updated: Nov 20, 2023	Comment: Variant summary: MUSK c.549A>G alters a conserved nucleotide resulting in a synonymous change. Consensus agreement among computation tools predict no significant impact on normal splicing. … (more) Variant summary: MUSK c.549A>G alters a conserved nucleotide resulting in a synonymous change. Consensus agreement among computation tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 9.7e-05 in 248688 control chromosomes (gnomAD). To our knowledge, no occurrence of c.549A>G in individuals affected with MUSK-Related Disorders and no experimental evidence demonstrating its impact on protein function have been reported. Two submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. One submitter classified the variant as likely benign, and one submitter classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as likely benign. (less)
Likely benign (May 13, 2019)	no assertion criteria provided Method: clinical testing	MUSK-related condition Affected status: unknown Allele origin: germline	PreventionGenetics, part of Exact Sciences Accession: SCV004743353.2 First in ClinVar: Mar 16, 2024 Last updated: Oct 08, 2024	Comment: This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).

Comment:

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.

Comment:

Variant summary: MUSK c.549A>G alters a conserved nucleotide resulting in a synonymous change. Consensus agreement among computation tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 9.7e-05 in 248688 control chromosomes (gnomAD). To our knowledge, no occurrence of c.549A>G in individuals affected with MUSK-Related Disorders and no experimental evidence demonstrating its impact on protein function have been reported. Two submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. One submitter classified the variant as likely benign, and one submitter classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as likely benign.

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

There are no citations for germline classification of this variant in ClinVar. If you know of citations for this variation, please consider submitting that information to ClinVar.

Text-mined citations for rs369254308 ...

These citations are identified by LitVar using the rs number, so they may include citations for more than one variant at this location. Please review the LitVar results carefully for your variant of interest.

Record last updated Oct 27, 2024

ClinVar Genomic variation as it relates to human health

NM_005592.4(MUSK):c.549A>G (p.Glu183=)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for rs369254308 ...