rs11570060

Positions:

• chr11-47347660-C-A
• chr11-47347660-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_000256.3(MYBPC3):​c.842G>T​(p.Arg281Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. R281Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MYBPC3 NM_000256.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.23

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYBPC3	NM_000256.3	c.842G>T	p.Arg281Leu	missense_variant	8/35	ENST00000545968.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYBPC3	ENST00000545968.6	c.842G>T	p.Arg281Leu	missense_variant	8/35	5	NM_000256.3	P4
MYBPC3	ENST00000399249.6	c.842G>T	p.Arg281Leu	missense_variant	8/34	5		A2
MYBPC3	ENST00000544791.1	c.842G>T	p.Arg281Leu	missense_variant, NMD_transcript_variant	8/27	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1421894 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 703614

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: 0.00

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	0.19
CardioboostCm	Benign	0.018
BayesDel_addAF	Uncertain	0.025	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.23	T;T;T
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.095
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.84	T;T;T
M_CAP	Uncertain	0.14	D
MetaRNN	Uncertain	0.65	D;D;D
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	0.68	N;.;.
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	-2.0	N;N;N
REVEL	Benign	0.17
Sift	Benign	0.23	T;T;T
Sift4G	Benign	0.093	T;T;T
Polyphen		0.062	B;.;.
Vest4		0.76
MutPred		0.52		Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);
MVP		0.80
MPC		0.27
ClinPred		0.44	T
GERP RS		4.5
Varity_R		0.24
gMVP		0.48

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs11570060; hg19: chr11-47369211;