rs199627411

Positions:

• chr14-23386553-A-G
• chr14-23386553-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_002471.4(MYH6):​c.4721T>C​(p.Ile1574Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 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. I1574N) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: MYH6 NM_002471.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.75

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, MYH6
• BP4: Computational evidence support a benign effect (MetaRNN=0.29606134).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH6	NM_002471.4	c.4721T>C	p.Ile1574Thr	missense_variant	33/39	ENST00000405093.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH6	ENST00000405093.9	c.4721T>C	p.Ile1574Thr	missense_variant	33/39	5	NM_002471.4	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 71

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.064	T
BayesDel_noAF	Benign	-0.15
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.67	D;D
Eigen	Benign	-0.15
Eigen_PC	Benign	-0.098
FATHMM_MKL	Benign	0.59	D
LIST_S2	Benign	0.82	T;.
M_CAP	Uncertain	0.090	D
MetaRNN	Benign	0.30	T;T
MetaSVM	Uncertain	-0.12	T
MutationAssessor	Uncertain	2.7	M;M
MutationTaster	Benign	0.77	D;D
PrimateAI	Uncertain	0.61	T
PROVEAN	Uncertain	-2.6	D;D
REVEL	Uncertain	0.39
Sift	Uncertain	0.023	D;D
Sift4G	Uncertain	0.052	T;T
Polyphen		0.0	B;B
Vest4		0.32
MutPred		0.45		Gain of phosphorylation at I1574 (P = 0.0078);Gain of phosphorylation at I1574 (P = 0.0078);
MVP		0.86
MPC		0.32
ClinPred		0.85	D
GERP RS		4.3
Varity_R		0.14
gMVP		0.37

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: rs199627411; hg19: chr14-23855762;