NM_000256.3:c.1814A>G

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1PM5

The NM_000256.3(MYBPC3):c.1814A>G(p.Asp605Gly) variant causes a missense change. The variant allele was found at a frequency of 0.0000333 in 1,593,244 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D605H) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000035 ( 0 hom. )

Consequence

MYBPC3
NM_000256.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:9

Conservation

PhyloP100: 4.65

Variant links:

Genes affected

MYBPC3 (HGNC:7551): (myosin binding protein C3) MYBPC3 encodes the cardiac isoform of myosin-binding protein C. Myosin-binding protein C is a myosin-associated protein found in the cross-bridge-bearing zone (C region) of A bands in striated muscle. MYBPC3 is expressed exclusively in heart muscle and is a key regulator of cardiac contraction. Mutations in this gene are a frequent cause of familial hypertrophic cardiomyopathy. [provided by RefSeq, May 2022]

MYBPC3 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 C2-type 4 (size 89) in uniprot entity MYPC3_HUMAN there are 31 pathogenic changes around while only 3 benign (91%) in NM_000256.3

PM5

Other missense variant is known to change same aminoacid residue: Variant chr11-47341222-C-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYBPC3	NM_000256.3 link	c.1814A>G	p.Asp605Gly	missense_variant	Exon 19 of 35	ENST00000545968.6	NP_000247.2	Q14896-1A5YM48

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MYBPC3	ENST00000545968.6 link	c.1814A>G	p.Asp605Gly	missense_variant	Exon 19 of 35	5	NM_000256.3	ENSP00000442795.1	Q14896-1
MYBPC3	ENST00000399249.6 link	c.1814A>G	p.Asp605Gly	missense_variant	Exon 18 of 34	5		ENSP00000382193.2	A8MXZ9
MYBPC3	ENST00000544791.1 link	n.1814A>G		non_coding_transcript_exon_variant	Exon 19 of 27	5		ENSP00000444259.1	F5GZR4

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152138

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000564

AC:

AN:

212592

Hom.:

AF XY:

0.0000522

AC XY:

AN XY:

114942

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.000127

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000347

AC:

AN:

1441106

Hom.:

Cov.:

AF XY:

0.0000350

AC XY:

AN XY:

714808

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000454

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74314

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:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000901

Hom.:

Bravo

AF:

0.0000189

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000120

AC:

ExAC

AF:

0.0000912

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

May 27, 2022

Clinical Genetics Laboratory, Skane University Hospital Lund

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 27, 2018

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The D605G variant in the MYBPC3 gene has been reported previously in one individual with dilatedcardiomyopathy (DCM), however information regarding familial segregation was not reported, and in vitro functional studies were not performed (Hershberger et al., 2010). Furthermore, D605G has been reported as variant of uncertain significance by two other clinical laboratories (ClinVar SCV000059088.4; SCV000207044.1; Landrum et al., 2015). The D605G variant was not observed with any significant frequency in approximately 6,200 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. A variant in the same residue (D605N) has been reported in the Human Gene Mutation Database in association with cardiomyopathy, however D605N is classified as a variant of uncertain significance by GeneDx and by another clinical laboratory (Stenson et al., 2014; ClinVar SCV000059087.4; Landrum et al., 2015). D605G results in a non-conservative amino acid substitution at a position where amino acids with similar properties to Aspartic Acid are conserved across species. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. In summary, D605G in the MYBPC3 gene is interpreted as a variant of uncertain significance. -

Hypertrophic cardiomyopathy

Uncertain:2

Jan 31, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces aspartic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 605 of the MYBPC3 protein (p.Asp605Gly). This variant is present in population databases (rs372371774, gnomAD 0.01%). This missense change has been observed in individual(s) with hypertrophic cardiomyopathy and/or MYBPC3-related conditions (PMID: 20215591, 25611685, 33782553, 37652022). ClinVar contains an entry for this variant (Variation ID: 42573). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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. -

Sep 23, 2024

All of Us Research Program, National Institutes of Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces aspartic acid with glycine at codon 605 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). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in two individuals affected with dilated cardiomyopathy (PMID: 20215591, 22337857), in one individual affected with hypertrophic cardiomyopathy (PMID: 25611685), and in one individual suspected of having drug-induced arrhythmia and sudden unexplained death (PMID: 31376648). This variant has been identified in 12/212592 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. -

not specified

Uncertain:1

Feb 09, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiomyopathy

Uncertain:1

Jan 19, 2023

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Primary dilated cardiomyopathy

Uncertain:1

Aug 20, 2014

Blueprint Genetics

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Hypertrophic cardiomyopathy 4

Uncertain:1

Jun 12, 2018

Agnes Ginges Centre for Molecular Cardiology, Centenary Institute

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: research

This variant has been identified as part of our research program. Refer to the 'condition' field for the phenotype of the proband(s) identified with this variant. For further information please feel free to contact us. -

Cardiovascular phenotype

Uncertain:1

Feb 17, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1814A>G (p.D605G) alteration is located in exon 19 (coding exon 19) of the MYBPC3 gene. This alteration results from a A to G substitution at nucleotide position 1814, causing the aspartic acid (D) at amino acid position 605 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

CardioboostCm

Uncertain

0.13

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Benign

-0.17

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.70

D;T;T

Eigen

Benign

-0.010

Eigen_PC

Benign

0.14

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.99

D;D;D

M_CAP

Uncertain

0.26

MetaRNN

Uncertain

0.69

D;D;D

MetaSVM

Benign

-0.50

MutationAssessor

Benign

1.1

L;.;.

PrimateAI

Uncertain

0.64

PROVEAN

Uncertain

-4.0

D;.;D

REVEL

Uncertain

0.46

Sift

Benign

0.11

T;.;T

Sift4G

Uncertain

0.0090

D;D;D

Vest4

0.84

MVP

0.86

MPC

0.41

ClinPred

0.19

GERP RS

4.6

Varity_R

0.61

gMVP

0.82

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