dbSNP rs375163919: MYH3:c.4647+6T>G (chr17-10633585-A-C) – ACMG Classification: Benign (-16 pts)

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_002470.4(MYH3):c.4647+6T>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000716 in 1,612,638 control chromosomes in the GnomAD database, including 3 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 0.00056 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00073 ( 3 hom. )

Consequence

MYH3
NM_002470.4 splice_region, intron

Scores

Splicing: ADA: 0.0008081

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 0.577

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:

LOC124903927 (HGNC:):

LOC124903927 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 -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BP6

Variant 17-10633585-A-C is Benign according to our data. Variant chr17-10633585-A-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 258688.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Homozygotes in GnomAdExome4 at 3 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002470.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYH3	NM_002470.4	MANE Select	c.4647+6T>G		splice_region intron	N/A	NP_002461.2	P11055

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
MYH3	ENST00000583535.6	TSL:5 MANE Select	c.4647+6T>G	splice_region intron	N/A	ENSP00000464317.1	P11055
MYH3	ENST00000961194.1		c.4647+6T>G	splice_region intron	N/A	ENSP00000631253.1
MYHAS	ENST00000579914.2	TSL:4	n.705+19708A>C	intron	N/A

Frequencies

GnomAD3 genomes

AF:

0.000565

AC:

AN:

152126

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00230

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00186

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000867

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000603

AC:

151

AN:

250394

AF XY:

0.000620

show subpopulations

Gnomad AFR exome

AF:

0.000369

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00198

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000956

Gnomad NFE exome

AF:

0.000732

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000732

AC:

1069

AN:

1460394

Hom.:

Cov.:

AF XY:

0.000740

AC XY:

538

AN XY:

726598

show subpopulations

African (AFR)

AF:

0.000179

AC:

AN:

33472

American (AMR)

AF:

0.000112

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00157

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00126

AC:

109

AN:

86250

European-Finnish (FIN)

AF:

0.000134

AC:

AN:

52136

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.000755

AC:

839

AN:

1111850

Other (OTH)

AF:

0.000928

AC:

AN:

60374

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

128

193

257

321

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

150

<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:

0.000565

AC:

AN:

152244

Hom.:

Cov.:

AF XY:

0.000551

AC XY:

AN XY:

74450

show subpopulations

African (AFR)

AF:

0.000169

AC:

AN:

41534

American (AMR)

AF:

0.000131

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00230

AC:

AN:

3472

East Asian (EAS)

AF:

0.000193

AC:

AN:

5172

South Asian (SAS)

AF:

0.00186

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000867

AC:

AN:

68012

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<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:

0.000766

Hom.:

Bravo

AF:

0.000544

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.000872

EpiControl

AF:

0.000948

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

Distal arthrogryposis type 2B1 (1)

Freeman-Sheldon syndrome (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

8.2

(source)

DANN

Benign

0.52

PhyloP100

0.58

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00081

dbscSNV1_RF

Benign

0.030

SpliceAI score (max)

0.020

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over