rs200217946

Positions:

chr17-10529471-G-A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PP2PP3BP4_ModerateBP6BS2

The NM_017534.6(MYH2):c.3128C>T(p.Ser1043Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000342 in 1,614,028 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S1043A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00035 ( 3 hom. )

Consequence

MYH2
NM_017534.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 7.72

Variant links:

Genes affected

MYH2 (HGNC:7572): (myosin heavy chain 2) Myosins are actin-based motor proteins that function in the generation of mechanical force in eukaryotic cells. Muscle myosins are heterohexamers composed of 2 myosin heavy chains and 2 pairs of nonidentical myosin light chains. This gene encodes a member of the class II or conventional myosin heavy chains, and functions in skeletal muscle contraction. This gene is found in a cluster of myosin heavy chain genes on chromosome 17. A mutation in this gene results in inclusion body myopathy-3. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Sep 2009]

MYH2 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MYH2. . Gene score misZ 1.9724 (greater than the threshold 3.09). Trascript score misZ 4.733 (greater than threshold 3.09). GenCC has associacion of gene with childhood-onset autosomal recessive myopathy with external ophthalmoplegia, hereditary inclusion body myopathy-joint contractures-ophthalmoplegia syndrome, myopathy, proximal, and ophthalmoplegia.

PP3

Multiple lines of computational evidence support a deleterious effect 8: AlphaMissense, BayesDel_noAF, Eigen, MutationAssessor, phyloP100way_vertebrate, PrimateAI, PROVEAN, REVEL [when max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.09905121).

BP6

Variant 17-10529471-G-A is Benign according to our data. Variant chr17-10529471-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 321678.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Benign=1}.

BS2

High Homozygotes in GnomAdExome4 at 3 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
MYH2	NM_017534.6 linkuse as main transcript	c.3128C>T	p.Ser1043Phe	missense_variant	25/40	ENST00000245503.10
MYHAS	NR_125367.1 linkuse as main transcript	n.168-38066G>A		intron_variant, non_coding_transcript_variant
MYH2	NM_001100112.2 linkuse as main transcript	c.3128C>T	p.Ser1043Phe	missense_variant	25/40

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH2	ENST00000245503.10 linkuse as main transcript	c.3128C>T	p.Ser1043Phe	missense_variant	25/40	1	NM_017534.6	P1	Q9UKX2-1
	ENST00000399342.6 linkuse as main transcript	n.207-3853G>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.000263

AC:

AN:

152142

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000917

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000279

Gnomad OTH

AF:

0.000958

GnomAD3 exomes

AF:

0.000625

AC:

157

AN:

251352

Hom.:

AF XY:

0.000596

AC XY:

AN XY:

135848

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00327

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000246

Gnomad OTH exome

AF:

0.00261

GnomAD4 exome

AF:

0.000350

AC:

512

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000348

AC XY:

253

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.00306

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:

0.000298

Gnomad4 OTH exome

AF:

0.000695

GnomAD4 genome

AF:

0.000263

AC:

AN:

152142

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74326

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.000917

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000279

Gnomad4 OTH

AF:

0.000958

Alfa

AF:

0.000315

Hom.:

Bravo

AF:

0.000404

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000626

AC:

EpiCase

AF:

0.000436

EpiControl

AF:

0.000237

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jan 12, 2024

Variant summary: MYH2 c.3128C>T (p.Ser1043Phe) results in a non-conservative amino acid change located in the Myosin Tail domain (IPR002928) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00062 in 251352 control chromosomes in the gnomAD database, including 1 homozygotes. To our knowledge, no occurrence of c.3128C>T in individuals affected with Myopathy, Proximal, And Ophthalmoplegia and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 321678). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Inclusion Body Myopathy, Dominant

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Myopathy, proximal, and ophthalmoplegia

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Dec 09, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.61

BayesDel_addAF

Uncertain

0.090

BayesDel_noAF

Pathogenic

0.35

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.65

D;D

Eigen

Pathogenic

0.90

Eigen_PC

Pathogenic

0.83

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.84

.;T

M_CAP

Uncertain

0.25

MetaRNN

Benign

0.099

T;T

MetaSVM

Pathogenic

0.97

MutationAssessor

Pathogenic

3.1

M;M

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Pathogenic

0.81

PROVEAN

Pathogenic

-4.6

D;D

REVEL

Pathogenic

0.82

Sift

Pathogenic

0.0

D;D

Sift4G

Uncertain

0.0040

D;D

Polyphen

0.95

P;P

Vest4

0.76

MVP

0.98

MPC

1.1

ClinPred

0.15

GERP RS

5.2

Varity_R

0.79

gMVP

0.46

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over