rs112161189

chr16-15771585-G-Achr16-15771585-G-C

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_Strong BP6 BP7 BS1

The NM_002474.3(MYH11):c.1017C>T(p.Ser339=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000163 in 1,613,696 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00016 (0 hom., cov: 29)
  • Exomes 𝑓: 0.00016 (0 hom.)
• Consequence: MYH11 NM_002474.3 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:8
• Conservation: PhyloP100: -1.38

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]

ACMG classification

Verdict is Benign. Variant got -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BP6: Variant 16-15771585-G-A is Benign according to our data. Variant chr16-15771585-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 199079.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=6, Benign=2, Uncertain_significance=2}.
• BP7: Synonymous conserved (PhyloP=-1.38 with no splicing effect.
• BS1: Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.000163 (238/1461816) while in subpopulation MID AF= 0.00122 (7/5718). AF 95% confidence interval is 0.000574. There are 0 homozygotes in gnomad4_exome. There are 116 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH11	NM_002474.3	c.1017C>T	p.Ser339=	synonymous_variant	9/41	ENST00000300036.6
MYH11	NM_001040113.2	c.1038C>T	p.Ser346=	synonymous_variant	10/43	ENST00000452625.7
MYH11	NM_001040114.2	c.1038C>T	p.Ser346=	synonymous_variant	10/42
MYH11	NM_022844.3	c.1017C>T	p.Ser339=	synonymous_variant	9/42

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH11	ENST00000300036.6	c.1017C>T	p.Ser339=	synonymous_variant	9/41	1	NM_002474.3	P3
MYH11	ENST00000452625.7	c.1038C>T	p.Ser346=	synonymous_variant	10/43	1	NM_001040113.2

Frequencies

GnomAD3 genomes AF: 0.000165 AC: 25 AN: 151764 Hom.: 0 Cov.: 29

Gnomad AFR AF: 0.000145

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000525

Gnomad ASJ AF: 0.00115

Gnomad EAS AF: 0.000387

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.000960

GnomAD3 exomes AF: 0.000255 AC: 64 AN: 251472 Hom.: 0 AF XY: 0.000235 AC XY: 32 AN XY: 135910

Gnomad AFR exome AF: 0.000308

Gnomad AMR exome AF: 0.000347

Gnomad ASJ exome AF: 0.00139

Gnomad EAS exome AF: 0.000217

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000176

Gnomad OTH exome AF: 0.00130

GnomAD4 exome AF: 0.000163 AC: 238 AN: 1461816 Hom.: 0 Cov.: 31 AF XY: 0.000160 AC XY: 116 AN XY: 727200

Gnomad4 AFR exome AF: 0.000179

Gnomad4 AMR exome AF: 0.000604

Gnomad4 ASJ exome AF: 0.00126

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.0000580

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.000127

Gnomad4 OTH exome AF: 0.000265

GnomAD4 genome AF: 0.000165 AC: 25 AN: 151880 Hom.: 0 Cov.: 29 AF XY: 0.0000808 AC XY: 6 AN XY: 74214

Gnomad4 AFR AF: 0.000145

Gnomad4 AMR AF: 0.000525

Gnomad4 ASJ AF: 0.00115

Gnomad4 EAS AF: 0.000387

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.000950

Alfa AF: 0.000180 Hom.: 0

Bravo AF: 0.000227

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.000218

EpiControl AF: 0.000237

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:8

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1 Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Sep 03, 2014	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Mar 01, 2024	MYH11: BP4, BP7 -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Nov 04, 2020	- -

Aortic aneurysm, familial thoracic 4 Uncertain:1 Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 30, 2024	- -

Familial thoracic aortic aneurysm and aortic dissection Benign:2

Likely benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Feb 10, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Aug 05, 2018	- -

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

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

Mar 17, 2024

- -

MYH11-related disorder Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Mar 09, 2023

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

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 10, 2015

This alteration is classified as likely benign based on a combination of the following: population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
Cadd	Benign	0.59
Dann	Benign	0.47

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs112161189; hg19: chr16-15865442;