VCV000227689.10 - ClinVar

NM_003803.4(MYOM1):c.120C>G (p.Thr40=)

Germline

Classification

criteria provided, multiple submitters, no conflicts. Learn more about how ClinVar calculates review status.

Likely benign

3 out of 3 submissions contributed to this 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.

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_003803.4(MYOM1):c.120C>G (p.Thr40=)

Variation ID: 227689 Accession: VCV000227689.10

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 18p11.31 18: 3215104 (GRCh38) [ NCBI UCSC ] 18: 3215102 (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	May 29, 2016	Feb 23, 2026	Jan 14, 2025

HGVS

Nucleotide	Protein	Molecular consequence
NM_003803.4:c.120C>G MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_003794.3:p.Thr40=	synonymous
NM_019856.2:c.120C>G	NP_062830.1:p.Thr40=	synonymous
NC_000018.10:g.3215104G>C
NC_000018.9:g.3215102G>C
NG_032120.1:g.10005C>G
LRG_426:g.10005C>G
LRG_426t1:c.120C>G	LRG_426p1:p.Thr40=

... more HGVS ... less HGVS

Protein change

Other names

Canonical SPDI

NC_000018.10:3215103:G:C

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.

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

The Genome Aggregation Database (gnomAD), exomes 0.00001

Trans-Omics for Precision Medicine (TOPMed) 0.00003

Links

ClinGen: CA10577059 dbSNP: rs876657535 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.
MYOM1		-	-	GRCh38 GRCh37	2159	2320

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.
not specified	Likely benign (2)	criteria provided, multiple submitters, no conflicts	Jan 19, 2020	RCV000213602.5
Hypertrophic cardiomyopathy	Likely benign (1)	criteria provided, single submitter	Jan 14, 2025	RCV003748208.4

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.	Expand all rows Collapse all rows 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.
Likely benign (Aug 13, 2015) C Contributing to aggregate classification	criteria provided, single submitter (LMM Criteria)	not specified	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine Accession: SCV000270555.3 First in ClinVar: May 29, 2016 Last updated: May 29, 2016	Comment: show p.Thr40Thr in exon 2 of MYOM1: This variant is not expected to have clinical sig nificance because it does not alter an amino acid residue and is not located wit hin the splice consensus sequence. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: not provided more Observation 1 Collection method: clinical testing Allele origin: germline Affected status: not provided Number of individuals with the variant: 1

Likely benign (Jan 19, 2020) C Contributing to aggregate classification	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	not specified	Ambry Genetics Accession: SCV002647981.2 First in ClinVar: Nov 29, 2022 Last updated: May 01, 2024	Comment: show This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown

Likely benign (Jan 14, 2025) C Contributing to aggregate classification	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Hypertrophic cardiomyopathy	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV004515800.3 First in ClinVar: Feb 20, 2024 Last updated: Feb 23, 2026	Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown

Comment:

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

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 rs876657535 ...

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 Feb 24, 2026