1-203168949-A-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_004997.3(MYBPH):c.1374T>A(p.Asn458Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,774 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: MYBPH NM_004997.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.543

Genes affected

MYBPH (HGNC:7552): (myosin binding protein H) Predicted to be a structural constituent of muscle. Predicted to be involved in regulation of striated muscle contraction. Predicted to be located in myosin filament. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.964

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYBPH	NM_004997.3	c.1374T>A	p.Asn458Lys	missense_variant	9/11	ENST00000255416.9
MYBPH	XM_047421205.1	c.1497T>A	p.Asn499Lys	missense_variant	10/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYBPH	ENST00000255416.9	c.1374T>A	p.Asn458Lys	missense_variant	9/11	1	NM_004997.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461774 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2 AN XY: 727190

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: 0.00000180

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000189

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 15, 2021

The c.1374T>A (p.N458K) alteration is located in exon 9 (coding exon 9) of the MYBPH gene. This alteration results from a T to A substitution at nucleotide position 1374, causing the asparagine (N) at amino acid position 458 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.069	T
BayesDel_noAF	Benign	-0.14
Cadd	Benign	11
Dann	Uncertain	0.98
DEOGEN2	Benign	0.39	T;T
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.86
FATHMM_MKL	Benign	0.14	N
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Uncertain	0.17	D
MetaRNN	Pathogenic	0.96	D;D
MetaSVM	Uncertain	0.64	D
MutationTaster	Benign	0.93	D
PrimateAI	Uncertain	0.61	T
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	.;D
Vest4		0.95
MutPred		0.93		.;Gain of ubiquitination at N458 (P = 0.0185);
MVP		0.80
MPC		0.57
ClinPred		1.0	D
GERP RS		-7.1
Varity_R		0.85
gMVP		0.95

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

LitVar

Other links and lift over

dbSNP: rs766142132; hg19: chr1-203138077;