Genetic Variant MYH11:c.2412-9C>A (chr16-15745246-G-T) – ACMG Classification: Benign (-20 pts)

Variant summary

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

The NM_002474.3(MYH11):c.2412-9C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00235 in 1,610,528 control chromosomes in the GnomAD database, including 71 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.012 ( 38 hom., cov: 32)

Exomes 𝑓: 0.0013 ( 33 hom. )

Consequence

MYH11
NM_002474.3 intron

Scores

Splicing: ADA: 0.0001252

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:12

Conservation

PhyloP100: -0.414

Publications

1 publications found

Variant links:

Genes affected

MYH11 (HGNC:7569): (myosin heavy chain 11) The protein encoded by this gene is a smooth muscle myosin belonging to the myosin heavy chain family. The gene product is a subunit of a hexameric protein that consists of two heavy chain subunits and two pairs of non-identical light chain subunits. It functions as a major contractile protein, converting chemical energy into mechanical energy through the hydrolysis of ATP. A chromosomal rearrangement involving this gene is associated with acute myeloid leukemia of the M4Eo subtype. Mutations in this gene are associated with visceral myopathy, megacystis-microcolon-intestinal hypoperistalsis syndrome 2, and familial thoracic aortic aneurysm 4. [provided by RefSeq, May 2022]

MYH11 Gene-Disease associations (from GenCC):

familial thoracic aortic aneurysm and aortic dissection
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
aortic aneurysm, familial thoracic 4
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
megacystis-microcolon-intestinal hypoperistalsis syndrome 2
Inheritance: AR Classification: STRONG, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)
megacystis-microcolon-intestinal hypoperistalsis syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
visceral myopathy 2
Inheritance: AR, AD Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

MYH11 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=-0.9).

BP6

Variant 16-15745246-G-T is Benign according to our data. Variant chr16-15745246-G-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 36617.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 = 0.0123 (1874/152190) while in subpopulation AFR AF = 0.0428 (1779/41524). AF 95% confidence interval is 0.0412. There are 38 homozygotes in GnomAd4. There are 879 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 38 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002474.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
MYH11	NM_002474.3	MANE Select	c.2412-9C>A	intron	N/A	NP_002465.1
MYH11	NM_001040113.2	MANE Plus Clinical	c.2433-9C>A	intron	N/A	NP_001035202.1
MYH11	NM_001040114.2		c.2433-9C>A	intron	N/A	NP_001035203.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
MYH11	ENST00000300036.6	TSL:1 MANE Select	c.2412-9C>A	intron	N/A	ENSP00000300036.5
MYH11	ENST00000452625.7	TSL:1 MANE Plus Clinical	c.2433-9C>A	intron	N/A	ENSP00000407821.2
MYH11	ENST00000396324.7	TSL:1	c.2433-9C>A	intron	N/A	ENSP00000379616.3

Frequencies

GnomAD3 genomes

AF:

0.0123

AC:

1872

AN:

152070

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0429

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00328

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00327

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.0100

GnomAD2 exomes

AF:

0.00337

AC:

844

AN:

250446

AF XY:

0.00246

show subpopulations

Gnomad AFR exome

AF:

0.0437

Gnomad AMR exome

AF:

0.00188

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00332

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000490

GnomAD4 exome

AF:

0.00131

AC:

1904

AN:

1458338

Hom.:

Cov.:

AF XY:

0.00108

AC XY:

781

AN XY:

725652

show subpopulations

African (AFR)

AF:

0.0439

AC:

1467

AN:

33432

American (AMR)

AF:

0.00197

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26122

East Asian (EAS)

AF:

0.00343

AC:

136

AN:

39676

South Asian (SAS)

AF:

0.000139

AC:

AN:

86194

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52934

Middle Eastern (MID)

AF:

0.00139

AC:

AN:

5748

European-Non Finnish (NFE)

AF:

0.0000316

AC:

AN:

1109230

Other (OTH)

AF:

0.00262

AC:

158

AN:

60288

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.565

Heterozygous variant carriers

186

280

373

466

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:

0.0123

AC:

1874

AN:

152190

Hom.:

Cov.:

AF XY:

0.0118

AC XY:

879

AN XY:

74412

show subpopulations

African (AFR)

AF:

0.0428

AC:

1779

AN:

41524

American (AMR)

AF:

0.00327

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00328

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

67996

Other (OTH)

AF:

0.00994

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

Heterozygous variant carriers

184

276

368

460

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

110

<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:

0.00221

Hom.:

Bravo

AF:

0.0137

Asia WGS

AF:

0.00231

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:12

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:5

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Apr 15, 2013

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.

Apr 09, 2025

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

Familial thoracic aortic aneurysm and aortic dissection

Benign:2

Apr 02, 2018

Color Diagnostics, LLC DBA Color Health

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Mar 21, 2023

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Aortic aneurysm, familial thoracic 4

Benign:2

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.

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Familial aortopathy

Benign:1

Sep 17, 2014

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

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

not provided

Benign:1

Oct 21, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Connective tissue disorder

Benign:1

Nov 01, 2016

Center for Human Genetics, Inc, Center for Human Genetics, Inc

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

1.2

(source)

DANN

Benign

0.84

PhyloP100

-0.41

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00013

dbscSNV1_RF

Benign

0.010

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over