Genetic Variant MYH3:c.534-44T>A (chr17-10649729-A-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_002470.4(MYH3):c.534-44T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. There are indicators that this mutation may affect the branch point..

Frequency

Genomes: 𝑓 0.0 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

MYH3
NM_002470.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.434

Publications

7 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:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

This position, referring to a specific DNA site, is a probable branch point but rather VUS (scored 5 / 10). The score ranges from 0 to 10, with values ≤3 considered benign and >5 classified as pathogenic. Computational evidence support a benign effect (BayesDel_noAF=-0.88).

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
MYH3	NM_002470.4 link	c.534-44T>A	intron_variant	Intron 6 of 40	ENST00000583535.6	NP_002461.2	P11055Q5GJ67
MYH3	XM_011523870.4 link	c.534-44T>A	intron_variant	Intron 6 of 40		XP_011522172.1	P11055
MYH3	XM_011523871.3 link	c.534-44T>A	intron_variant	Intron 6 of 40		XP_011522173.1	P11055
MYH3	XM_047436127.1 link	c.534-44T>A	intron_variant	Intron 8 of 42		XP_047292083.1

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
MYH3	ENST00000583535.6 link	c.534-44T>A	intron_variant	Intron 6 of 40	5	NM_002470.4	ENSP00000464317.1	P11055
MYH3	ENST00000579489.2 link	n.486-44T>A	intron_variant	Intron 2 of 3	5
MYHAS	ENST00000579914.2 link	n.706-34206A>T	intron_variant	Intron 4 of 4	4
MYHAS	ENST00000584139.2 link	n.1042-31004A>T	intron_variant	Intron 7 of 8	3

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

151956

Hom.:

Cov.:

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

1429756

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

713584

African (AFR)

AF:

0.00

AC:

AN:

32636

American (AMR)

AF:

0.00

AC:

AN:

44680

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25912

East Asian (EAS)

AF:

0.00

AC:

AN:

39498

South Asian (SAS)

AF:

0.00

AC:

AN:

85516

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53284

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5704

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1083204

Other (OTH)

AF:

0.00

AC:

AN:

59322

GnomAD4 genome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

151956

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74218

African (AFR)

AF:

0.00

AC:

AN:

41336

American (AMR)

AF:

0.00

AC:

AN:

15260

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10578

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68004

Other (OTH)

AF:

0.00

AC:

AN:

2088

Alfa

AF:

0.00

Hom.:

16466

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.88

CADD

Benign

6.9

(source)

DANN

Benign

0.44

PhyloP100

0.43

BranchPoint Hunter

5.0

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over