NM_000256.3:c.2310C>G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 6P and 2B. PM1PM2PM5BP4_Moderate

The NM_000256.3(MYBPC3):c.2310C>G(p.Asp770Glu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 17/25 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D770N) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

MYBPC3
NM_000256.3 missense, splice_region

Scores

Splicing: ADA: 0.000003244

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.0280

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

hypertrophic cardiomyopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
hypertrophic cardiomyopathy 4
Inheritance: AD, AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
left ventricular noncompaction 10
Inheritance: AR, AD Classification: DEFINITIVE, MODERATE, LIMITED Submitted by: Ambry Genetics
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
arrhythmogenic right ventricular cardiomyopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
atrial fibrillation
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
dilated cardiomyopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

MYBPC3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 17 uncertain in NM_000256.3

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr11-47338520-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 36604.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP4

Computational evidence support a benign effect (MetaRNN=0.16922295).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYBPC3	NM_000256.3 link	c.2310C>G	p.Asp770Glu	missense_variant, splice_region_variant	Exon 24 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.2310C>G	p.Asp770Glu	missense_variant, splice_region_variant	Exon 24 of 35	5	NM_000256.3	ENSP00000442795.1	Q14896-1
MYBPC3	ENST00000399249.6 link	c.2310C>G	p.Asp770Glu	missense_variant, splice_region_variant	Exon 23 of 34	5		ENSP00000382193.2	A8MXZ9
MYBPC3	ENST00000544791.1 link	n.2310C>G		splice_region_variant, non_coding_transcript_exon_variant	Exon 24 of 27	5		ENSP00000444259.1	F5GZR4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1398578

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

689786

African (AFR)

AF:

0.00

AC:

AN:

31618

American (AMR)

AF:

0.00

AC:

AN:

35734

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25180

East Asian (EAS)

AF:

0.00

AC:

AN:

35752

South Asian (SAS)

AF:

0.00

AC:

AN:

79254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48144

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5698

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1079162

Other (OTH)

AF:

0.00

AC:

AN:

58036

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Sep 29, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.81

CardioboostCm

Benign

0.0065

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.53

CADD

Benign

0.34

(source)

DANN

Benign

0.95

DEOGEN2

Uncertain

0.68

D;T;T

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.61

LIST_S2

Uncertain

0.90

D;D;D

M_CAP

Benign

0.070

MetaRNN

Benign

0.17

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.89

L;.;.

PhyloP100

0.028

PrimateAI

Uncertain

0.55

PROVEAN

Uncertain

-2.7

D;.;D

REVEL

Benign

0.076

Sift

Benign

0.070

T;.;T

Sift4G

Benign

0.088

T;T;T

Vest4

0.30

MVP

0.13

MPC

0.21

ClinPred

0.055

GERP RS

-2.7

Varity_R

0.14

gMVP

0.73

Mutation Taster

=68/32

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0000032

dbscSNV1_RF

Benign

0.060

SpliceAI score (max)

0.12

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over