rs114366800

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_002470.4(MYH3):c.349-7C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00223 in 1,613,902 control chromosomes in the GnomAD database, including 70 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.012 ( 30 hom., cov: 32)

Exomes 𝑓: 0.0013 ( 40 hom. )

Consequence

MYH3
NM_002470.4 splice_region, intron

Scores

Splicing: ADA: 0.00003640

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.297

Publications

0 publications found

Variant links:

Genes affected

MYH3 (HGNC:7573): (myosin heavy chain 3) Myosin is a major contractile protein which converts chemical energy into mechanical energy through the hydrolysis of ATP. Myosin is a hexameric protein composed of a pair of myosin heavy chains (MYH) and two pairs of nonidentical light chains. This gene is a member of the MYH family and encodes a protein with an IQ domain and a myosin head-like domain. Mutations in this gene have been associated with two congenital contracture (arthrogryposis) syndromes, Freeman-Sheldon syndrome and Sheldon-Hall syndrome. [provided by RefSeq, Jul 2008]

MYH3 links:

MYHAS (HGNC:50609): (myosin heavy chain gene cluster antisense RNA) Predicted to enable primary miRNA binding activity. Predicted to be involved in response to muscle activity and skeletal muscle fiber development. Predicted to act upstream of or within with a positive effect on gene expression. Predicted to be located in cytoplasm and nucleus. [provided by Alliance of Genome Resources, Apr 2022]

MYHAS links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.88).

BP6

Variant 17-10651675-G-A is Benign according to our data. Variant chr17-10651675-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 258683.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0115 (1751/152184) while in subpopulation AFR AF = 0.04 (1660/41504). AF 95% confidence interval is 0.0384. There are 30 homozygotes in GnomAd4. There are 857 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 30 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
MYH3	NM_002470.4 link	c.349-7C>T	splice_region_variant, intron_variant	Intron 4 of 40	ENST00000583535.6	NP_002461.2	P11055Q5GJ67
MYH3	XM_011523870.4 link	c.349-7C>T	splice_region_variant, intron_variant	Intron 4 of 40		XP_011522172.1	P11055
MYH3	XM_011523871.3 link	c.349-7C>T	splice_region_variant, intron_variant	Intron 4 of 40		XP_011522173.1	P11055
MYH3	XM_047436127.1 link	c.349-7C>T	splice_region_variant, intron_variant	Intron 6 of 42		XP_047292083.1

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
MYH3	ENST00000583535.6 link	c.349-7C>T	splice_region_variant, intron_variant	Intron 4 of 40	5	NM_002470.4	ENSP00000464317.1	P11055
MYH3	ENST00000579489.2 link	n.294C>T	non_coding_transcript_exon_variant	Exon 1 of 4	5
MYHAS	ENST00000579914.2 link	n.706-32260G>A	intron_variant	Intron 4 of 4	4
MYHAS	ENST00000584139.2 link	n.1042-29058G>A	intron_variant	Intron 7 of 8	3

Frequencies

GnomAD3 genomes

AF:

0.0115

AC:

1744

AN:

152068

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0399

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00426

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:

0.000132

Gnomad OTH

AF:

0.00815

GnomAD2 exomes

AF:

0.00302

AC:

758

AN:

251394

AF XY:

0.00210

show subpopulations

Gnomad AFR exome

AF:

0.0407

Gnomad AMR exome

AF:

0.00214

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000880

Gnomad OTH exome

AF:

0.00163

GnomAD4 exome

AF:

0.00126

AC:

1840

AN:

1461718

Hom.:

Cov.:

AF XY:

0.00102

AC XY:

742

AN XY:

727170

show subpopulations

African (AFR)

AF:

0.0421

AC:

1410

AN:

33476

American (AMR)

AF:

0.00268

AC:

120

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000104

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00295

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000127

AC:

141

AN:

1111868

Other (OTH)

AF:

0.00237

AC:

143

AN:

60382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

108

215

323

430

538

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

144

192

240

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0115

AC:

1751

AN:

152184

Hom.:

Cov.:

AF XY:

0.0115

AC XY:

857

AN XY:

74406

show subpopulations

African (AFR)

AF:

0.0400

AC:

1660

AN:

41504

American (AMR)

AF:

0.00425

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10594

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

68012

Other (OTH)

AF:

0.00806

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

177

266

354

443

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00654

Hom.:

Bravo

AF:

0.0135

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

MYH3-related disorder

Benign:1

Apr 25, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Freeman-Sheldon syndrome

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Distal arthrogryposis type 2B1

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.88

CADD

Benign

0.58

(source)

DANN

Benign

0.50

PhyloP100

-0.30

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000036

dbscSNV1_RF

Benign

0.0040

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over