chr14-23417486-C-T

Position:

• chr14-23417486-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000257.4(MYH7):​c.4353+17G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00261 in 1,612,292 control chromosomes in the GnomAD database, including 121 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.013 (63 hom., cov: 33)
  • Exomes 𝑓: 0.0015 (58 hom.)
• Consequence: MYH7 NM_000257.4 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:10
• Conservation: PhyloP100: -0.196

Genes affected

MYH7 (HGNC:7577): (myosin heavy chain 7) Muscle myosin is a hexameric protein containing 2 heavy chain subunits, 2 alkali light chain subunits, and 2 regulatory light chain subunits. This gene encodes the beta (or slow) heavy chain subunit of cardiac myosin. It is expressed predominantly in normal human ventricle. It is also expressed in skeletal muscle tissues rich in slow-twitch type I muscle fibers. Changes in the relative abundance of this protein and the alpha (or fast) heavy subunit of cardiac myosin correlate with the contractile velocity of cardiac muscle. Its expression is also altered during thyroid hormone depletion and hemodynamic overloading. Mutations in this gene are associated with familial hypertrophic cardiomyopathy, myosin storage myopathy, dilated cardiomyopathy, and Laing distal myopathy. [provided by RefSeq, May 2022]

MHRT (HGNC:):

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.7).
• BP6: Variant 14-23417486-C-T is Benign according to our data. Variant chr14-23417486-C-T is described in ClinVar as [Benign]. Clinvar id is 188634.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-23417486-C-T is described in Lovd as [Benign].
• BA1: GnomAdExome4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0506 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH7	NM_000257.4	c.4353+17G>A		intron_variant		ENST00000355349.4
MHRT	NR_126491.1	n.814-47C>T		intron_variant, non_coding_transcript_variant
MYH7	NM_001407004.1	c.4353+17G>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH7	ENST00000355349.4	c.4353+17G>A		intron_variant		1	NM_000257.4	P1

Frequencies

GnomAD3 genomes AF: 0.0133 AC: 2017 AN: 152212 Hom.: 62 Cov.: 33

Gnomad AFR AF: 0.0455

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00563

Gnomad ASJ AF: 0.000576

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000191

Gnomad OTH AF: 0.0143

GnomAD3 exomes AF: 0.00359 AC: 901 AN: 251152 Hom.: 24 AF XY: 0.00239 AC XY: 325 AN XY: 135764

Gnomad AFR exome AF: 0.0485

Gnomad AMR exome AF: 0.00237

Gnomad ASJ exome AF: 0.000696

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000123

Gnomad OTH exome AF: 0.00163

GnomAD4 exome AF: 0.00150 AC: 2184 AN: 1459962 Hom.: 58 Cov.: 34 AF XY: 0.00122 AC XY: 889 AN XY: 726288

Gnomad4 AFR exome AF: 0.0526

Gnomad4 AMR exome AF: 0.00257

Gnomad4 ASJ exome AF: 0.000612

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000928

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000953

Gnomad4 OTH exome AF: 0.00291

GnomAD4 genome AF: 0.0133 AC: 2023 AN: 152330 Hom.: 63 Cov.: 33 AF XY: 0.0123 AC XY: 919 AN XY: 74482

Gnomad4 AFR AF: 0.0455

Gnomad4 AMR AF: 0.00562

Gnomad4 ASJ AF: 0.000576

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000191

Gnomad4 OTH AF: 0.0142

Alfa AF: 0.00722 Hom.: 4

Bravo AF: 0.0149

Asia WGS AF: 0.00289 AC: 11 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:10

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:6

Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Sep 06, 2023	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -

Hypertrophic cardiomyopathy Benign:2

Benign, criteria provided, single submitter	clinical testing	Invitae	Feb 01, 2024	- -
Benign, no assertion criteria provided	clinical testing	Cohesion Phenomics	Oct 10, 2022	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.70
CADD	Benign	5.2
DANN	Benign	0.77

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: rs45581933; hg19: chr14-23886695;