NM_000256.3(MYBPC3):c.74G>A (p.Ser25Asn) AND Hypertrophic cardiomyopathy

Germline classification:: Uncertain significance (3 submissions)
Last evaluated:: Dec 13, 2023
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000314127.15

Allele description [Variation Report for NM_000256.3(MYBPC3):c.74G>A (p.Ser25Asn)]

NM_000256.3(MYBPC3):c.74G>A (p.Ser25Asn)

Gene:

MYBPC3:myosin binding protein C3 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

11p11.2

Genomic location:

Preferred name:

NM_000256.3(MYBPC3):c.74G>A (p.Ser25Asn)

HGVS:

NC_000011.10:g.47351457C>T
NG_007667.1:g.6246G>A
NM_000256.3:c.74G>AMANE SELECT
NP_000247.2:p.Ser25Asn
LRG_386t1:c.74G>A
LRG_386:g.6246G>A
LRG_386p1:p.Ser25Asn
NC_000011.9:g.47373008C>T

Protein change:

S25N

Links:

dbSNP: rs371140684

NCBI 1000 Genomes Browser:

rs371140684

Molecular consequence:

NM_000256.3:c.74G>A - missense variant - [Sequence Ontology: SO:0001583]

Observations:

Condition(s)

Name:: Hypertrophic cardiomyopathy
Synonyms:: HYPERTROPHIC MYOCARDIOPATHY
Identifiers:: MONDO: MONDO:0005045; MeSH: D002312; MedGen: C0007194; Human Phenotype Ontology: HP:0001639

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000372420	Illumina Laboratory Services, Illumina	criteria provided, single submitter (ICSL Variant Classification 20161018)	Uncertain significance (Jun 14, 2016)	germline	clinical testing	ICSL_Variant_Classification_20161018.pdf, Citation Link,
SCV000623619	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Dec 11, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV004845003	All of Us Research Program, National Institutes of Health	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain Significance (Dec 13, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000372420

Illumina Laboratory Services, Illumina

criteria provided, single submitter

(ICSL Variant Classification 20161018)

Uncertain significance
(Jun 14, 2016)

germline

clinical testing

ICSL_Variant_Classification_20161018.pdf,

Citation Link,

SCV000623619

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Dec 11, 2023)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

SCV004845003

All of Us Research Program, National Institutes of Health

criteria provided, single submitter

(ACMG Guidelines, 2015)

Uncertain Significance
(Dec 13, 2023)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	7	not provided	not provided	108544	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group, Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee.

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

Details of each submission

From Illumina Laboratory Services, Illumina, SCV000372420.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000623619.7

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

This sequence change replaces serine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 25 of the MYBPC3 protein (p.Ser25Asn). This variant is present in population databases (rs371140684, gnomAD 0.08%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with MYBPC3-related conditions. ClinVar contains an entry for this variant (Variation ID: 164159). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The asparagine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From All of Us Research Program, National Institutes of Health, SCV004845003.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	7	not provided	not provided	clinical testing	PubMed (1)

Description

This missense variant replaces serine with asparagine at codon 25 of the MYBPC3 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been performed for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 17/269206 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	108544	not provided	not provided		7	not provided	not provided	not provided

Last Updated: Nov 18, 2024

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