chr11-47331616-C-T

Variant names:

• chr11-47331616-C-T
• rs549519453
• NM_000256.3:c.*127G>A

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_Strong BS1_Supporting

The NM_000256.3(MYBPC3):​c.*127G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000241 in 536,038 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00023 (1 hom., cov: 33)
  • Exomes 𝑓: 0.00024 (0 hom.)
• Consequence: MYBPC3 NM_000256.3 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: -0.0220
• Publications: 1 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: Ambry Genetics, G2P, 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: AD, AR Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BS1: Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.00023 (35/152344) while in subpopulation EAS AF = 0.00482 (25/5184). AF 95% confidence interval is 0.00335. There are 1 homozygotes in GnomAd4. There are 21 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

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.*127G>A		3_prime_UTR	Exon 35 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.*127G>A		3_prime_UTR	Exon 35 of 35	ENSP00000442795.1	Q14896-1
	MYBPC3	ENST00000399249.6	TSL:5	c.*127G>A		3_prime_UTR	Exon 34 of 34	ENSP00000382193.2	A8MXZ9

Frequencies

GnomAD3 genomes AF: 0.000230 AC: 35 AN: 152226 Hom.: 1 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00481

Gnomad SAS AF: 0.000828

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.000245 AC: 94 AN: 383694 Hom.: 0 Cov.: 4 AF XY: 0.000301 AC XY: 60 AN XY: 199258

African (AFR) AF: 0.00 AC: 0 AN: 11150

American (AMR) AF: 0.00 AC: 0 AN: 16062

Ashkenazi Jewish (ASJ) AF: 0.000331 AC: 4 AN: 12102

East Asian (EAS) AF: 0.00265 AC: 73 AN: 27530

South Asian (SAS) AF: 0.000339 AC: 12 AN: 35416

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 25322

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1736

European-Non Finnish (NFE) AF: 0.00000431 AC: 1 AN: 231792

Other (OTH) AF: 0.000177 AC: 4 AN: 22584

GnomAD4 genome AF: 0.000230 AC: 35 AN: 152344 Hom.: 1 Cov.: 33 AF XY: 0.000282 AC XY: 21 AN XY: 74502

African (AFR) AF: 0.0000240 AC: 1 AN: 41582

American (AMR) AF: 0.00 AC: 0 AN: 15296

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00482 AC: 25 AN: 5184

South Asian (SAS) AF: 0.000829 AC: 4 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000735 AC: 5 AN: 68034

Other (OTH) AF: 0.00 AC: 0 AN: 2116

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.000385

Asia WGS AF: 0.00115 AC: 4 AN: 3478

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Hypertrophic cardiomyopathy 4 (1)
-	1	-	Left ventricular noncompaction 10 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	3.1
DANN	Benign	0.67
PhyloP100		-0.022

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: rs549519453; hg19: chr11-47353167;