chr11-47349871-G-C

Variant names:

• chr11-47349871-G-C
• NM_000256.3:c.557C>G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PM5

The NM_000256.3(MYBPC3):​c.557C>G​(p.Pro186Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,459,720 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P186L) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: MYBPC3 NM_000256.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.95

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a domain Ig-like C2-type 1 (size 103) in uniprot entity MYPC3_HUMAN there are 30 pathogenic changes around while only 10 benign (75%) 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 chr11-47349871-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYBPC3	NM_000256.3	c.557C>G	p.Pro186Arg	missense_variant	Exon 5 of 35	ENST00000545968.6	NP_000247.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYBPC3	ENST00000545968.6	c.557C>G	p.Pro186Arg	missense_variant	Exon 5 of 35	5	NM_000256.3	ENSP00000442795.1
MYBPC3	ENST00000399249.6	c.557C>G	p.Pro186Arg	missense_variant	Exon 5 of 34	5		ENSP00000382193.2
MYBPC3	ENST00000544791.1	n.557C>G		non_coding_transcript_exon_variant	Exon 5 of 27	5		ENSP00000444259.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459720 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726038

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.31
CardioboostCm	Benign	0.034
BayesDel_addAF	Uncertain	0.032	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.15	T;T;T
Eigen	Benign	0.068
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.83	T;T;T
M_CAP	Uncertain	0.14	D
MetaRNN	Uncertain	0.49	T;T;T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	1.2	L;.;.
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	0.48	N;N;N
REVEL	Benign	0.27
Sift	Benign	0.14	T;T;T
Sift4G	Uncertain	0.041	D;D;D
Polyphen		0.35	B;.;.
Vest4		0.51
MutPred		0.60		Gain of MoRF binding (P = 0.0017);Gain of MoRF binding (P = 0.0017);Gain of MoRF binding (P = 0.0017);
MVP		0.87
MPC		0.78
ClinPred		0.94	D
GERP RS		4.8
Varity_R		0.17
gMVP		0.51

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-47371422;