rs371167525

chr11-47343078-C-Achr11-47343078-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1 PM2 PP3

The NM_000256.3(MYBPC3):c.1294G>T(p.Ala432Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 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. A432P) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MYBPC3 NM_000256.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.66

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 Uncertain_significance. Variant got 5 ACMG points.

• PM1: In a domain Ig-like C2-type 2 (size 90) in uniprot entity MYPC3_HUMAN there are 25 pathogenic changes around while only 8 benign (76%) in NM_000256.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.81

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYBPC3	NM_000256.3	c.1294G>T	p.Ala432Ser	missense_variant	15/35	ENST00000545968.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYBPC3	ENST00000545968.6	c.1294G>T	p.Ala432Ser	missense_variant	15/35	5	NM_000256.3	P4
MYBPC3	ENST00000399249.6	c.1294G>T	p.Ala432Ser	missense_variant	14/34	5		A2
MYBPC3	ENST00000544791.1	c.1294G>T	p.Ala432Ser	missense_variant, NMD_transcript_variant	15/27	5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
CardioboostCm	Benign	0.023
BayesDel_addAF	Uncertain	0.059	T
BayesDel_noAF	Benign	-0.15
Cadd	Uncertain	24
Dann	Uncertain	0.99
DEOGEN2	Benign	0.29	T;T;T
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.86	D;D;D
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.81	D;D;D
MetaSVM	Benign	-0.58	T
MutationAssessor	Uncertain	2.1	M;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-2.1	N;N;N
REVEL	Benign	0.17
Sift	Benign	0.33	T;T;T
Sift4G	Benign	0.14	T;T;T
Vest4		0.78
MVP		0.86
MPC		0.75
ClinPred		0.95	D
GERP RS		4.7
Varity_R		0.21
gMVP		0.76

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs371167525; hg19: chr11-47364629;