rs397515953

Variant names:

• chr11-47338651-C-A
• rs397515953
• NM_000256.3:c.2177G>T

Your query was ambiguous. Multiple possible variants found:

• chr11-47338651-C-A
• chr11-47338651-C-G
• chr11-47338651-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000256.3(MYBPC3):​c.2177G>T​(p.Arg726Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 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. R726C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MYBPC3 NM_000256.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.36
• Publications: 0 publications found

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: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• left ventricular noncompaction 10

  Inheritance: AD, AR 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
• congenital heart disease

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• dilated cardiomyopathy

  Inheritance: AR, AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.772

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000256.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYBPC3	NM_000256.3	MANE Select	c.2177G>T	p.Arg726Leu	missense	Exon 23 of 35	NP_000247.2	Q14896-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYBPC3	ENST00000545968.6	TSL:5 MANE Select	c.2177G>T	p.Arg726Leu	missense	Exon 23 of 35	ENSP00000442795.1	Q14896-1
	MYBPC3	ENST00000399249.6	TSL:5	c.2177G>T	p.Arg726Leu	missense	Exon 22 of 34	ENSP00000382193.2	A8MXZ9
	MYBPC3	ENST00000544791.1	TSL:5	n.2177G>T		non_coding_transcript_exon	Exon 23 of 27	ENSP00000444259.1	F5GZR4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Cardiomyopathy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
CardioboostCm	Uncertain	0.11
BayesDel_addAF	Benign	-0.017	T
BayesDel_noAF	Benign	-0.26
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.73	D
Eigen	Benign	0.11
Eigen_PC	Benign	0.018
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.28	D
MetaRNN	Pathogenic	0.77	D
MetaSVM	Benign	-0.38	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		1.4
PrimateAI	Benign	0.40	T
PROVEAN	Pathogenic	-4.7	D
REVEL	Benign	0.18
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0040	D
Vest4		0.67
MVP		0.87
MPC		0.68
ClinPred		0.94	D
GERP RS		2.3
Varity_R		0.46
gMVP		0.64
Mutation Taster		=77/23	polymorphism

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

Other links and lift over

dbSNP: rs397515953; hg19: chr11-47360202; COSMIC: COSV57028482;