rs977234074

Positions:

• chr14-23405746-C-G
• chr14-23405746-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_002471.4(MYH6):​c.226G>C​(p.Val76Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MYH6 NM_002471.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.136

Genes affected

MYH6 (HGNC:7576): (myosin heavy chain 6) Cardiac muscle myosin is a hexamer consisting of two heavy chain subunits, two light chain subunits, and two regulatory subunits. This gene encodes the alpha heavy chain subunit of cardiac myosin. The gene is located approximately 4kb downstream of the gene encoding the beta heavy chain subunit of cardiac myosin. Mutations in this gene cause familial hypertrophic cardiomyopathy and atrial septal defect 3. [provided by RefSeq, Feb 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MYH6. . Gene score misZ 0.85843 (greater than the threshold 3.09). Trascript score misZ 4.1282 (greater than threshold 3.09). GenCC has associacion of gene with dilated cardiomyopathy, hypertrophic cardiomyopathy, Keppen-Lubinsky syndrome, atrial septal defect 3, familial isolated dilated cardiomyopathy, hypertrophic cardiomyopathy 14.
• BP4: Computational evidence support a benign effect (MetaRNN=0.1186676).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH6	NM_002471.4	c.226G>C	p.Val76Leu	missense_variant	4/39	ENST00000405093.9	NP_002462.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYH6	ENST00000405093.9	c.226G>C	p.Val76Leu	missense_variant	4/39	5	NM_002471.4	ENSP00000386041	P1
MYH6	ENST00000557461.2	n.293G>C		non_coding_transcript_exon_variant	4/14	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	0.00013	T
BayesDel_noAF	Benign	-0.24
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.34	T;T
Eigen	Benign	-0.48
Eigen_PC	Benign	-0.39
FATHMM_MKL	Benign	0.59	D
LIST_S2	Benign	0.84	T;.
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	1.6	L;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-1.3	N;N
REVEL	Benign	0.27
Sift	Benign	0.20	T;T
Sift4G	Benign	0.28	T;T
Polyphen		0.0010	B;B
Vest4		0.18
MutPred		0.28		Gain of catalytic residue at P81 (P = 2e-04);Gain of catalytic residue at P81 (P = 2e-04);
MVP		0.61
MPC		0.34
ClinPred		0.22	T
GERP RS		3.9
Varity_R		0.19
gMVP		0.52

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: rs977234074; hg19: chr14-23874955;