rs113696032

Positions:

• chr16-15740155-C-A
• chr16-15740155-C-T

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 1P and 7B. PP2 BP4_Moderate BP6 BS1

The NM_002474.3(MYH11):​c.2893G>T​(p.Ala965Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000295 in 1,614,100 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 0.00031 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00029 (0 hom.)
• Consequence: MYH11 NM_002474.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5 B:8
• Conservation: PhyloP100: 5.82

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 Likely_benign. Variant got -6 ACMG points.

• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MYH11. . Gene score misZ 1.4389 (greater than the threshold 3.09). Trascript score misZ 3.4142 (greater than threshold 3.09). GenCC has associacion of gene with aortic aneurysm, familial thoracic 4, visceral myopathy 2, familial thoracic aortic aneurysm and aortic dissection, megacystis-microcolon-intestinal hypoperistalsis syndrome 2, megacystis-microcolon-intestinal hypoperistalsis syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.1176061).
• BP6: Variant 16-15740155-C-A is Benign according to our data. Variant chr16-15740155-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 201058.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=7, Uncertain_significance=4}. Variant chr16-15740155-C-A is described in Lovd as [Likely_benign].
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000309 (47/152220) while in subpopulation NFE AF= 0.000603 (41/68042). AF 95% confidence interval is 0.000457. There are 0 homozygotes in gnomad4. There are 28 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH11	NM_002474.3	c.2893G>T	p.Ala965Ser	missense_variant	23/41	ENST00000300036.6	NP_002465.1
MYH11	NM_001040113.2	c.2914G>T	p.Ala972Ser	missense_variant	24/43	ENST00000452625.7	NP_001035202.1
MYH11	NM_001040114.2	c.2914G>T	p.Ala972Ser	missense_variant	24/42		NP_001035203.1
MYH11	NM_022844.3	c.2893G>T	p.Ala965Ser	missense_variant	23/42		NP_074035.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYH11	ENST00000300036.6	c.2893G>T	p.Ala965Ser	missense_variant	23/41	1	NM_002474.3	ENSP00000300036	P3
MYH11	ENST00000452625.7	c.2914G>T	p.Ala972Ser	missense_variant	24/43	1	NM_001040113.2	ENSP00000407821

Frequencies

GnomAD3 genomes AF: 0.000309 AC: 47 AN: 152220 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000965

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.000603

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000350 AC: 88 AN: 251494 Hom.: 0 AF XY: 0.000316 AC XY: 43 AN XY: 135922

Gnomad AFR exome AF: 0.000246

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.000139

Gnomad NFE exome AF: 0.000677

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.000293 AC: 429 AN: 1461880 Hom.: 0 Cov.: 31 AF XY: 0.000292 AC XY: 212 AN XY: 727242

Gnomad4 AFR exome AF: 0.000179

Gnomad4 AMR exome AF: 0.0000447

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.000150

Gnomad4 NFE exome AF: 0.000358

Gnomad4 OTH exome AF: 0.000232

GnomAD4 genome AF: 0.000309 AC: 47 AN: 152220 Hom.: 0 Cov.: 32 AF XY: 0.000376 AC XY: 28 AN XY: 74370

Gnomad4 AFR AF: 0.0000965

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000603

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000525 Hom.: 0

Bravo AF: 0.000268

TwinsUK AF: 0.00 AC: 0

ALSPAC AF: 0.000519 AC: 2

ESP6500AA AF: 0.000228 AC: 1

ESP6500EA AF: 0.000581 AC: 5

ExAC AF: 0.000395 AC: 48

EpiCase AF: 0.000927

EpiControl AF: 0.000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5 Benign:8

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Aortic aneurysm, familial thoracic 4 Uncertain:2 Benign:3

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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago	Dec 15, 2021	MYH11 NM_002474.3 exon 23 p.Ala965Ser (c.2893G>T): This variant has not been reported in the literature but is present in 0.06% (41/68042) of European alleles in the Genome Aggregation Database (https://gnomad.broadinstitute.org/variant/16-15740155-C-A?dataset=gnomad_r3). This variant is present in ClinVar (Variation ID:201058). Evolutionary conservation for this variant is unclear; computational predictive tools suggest that this variant may not impact the protein. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	Jun 06, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	May 13, 2016	- -

not provided Uncertain:2 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Feb 22, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Jun 30, 2018	The MYH11 c.2893G>T; p.Ala965Ser variant (rs113696032), to our knowledge, has not been described in the medical literature but is reported in ClinVar (Variation ID: 201058) and observed in the general population at an overall frequency of 0.035% (96/277250 alleles) in the Genome Aggregation Database. The alanine at codon 965 is moderately conserved, but computational algorithms (PolyPhen-2: benign, SIFT: damaging) predict conflicting effects of this variant on protein structure and/or function. Due to limited information regarding this variant, its clinical significance cannot be determined with certainty. Pathogenic MYH11 variants are inherited in an autosomal dominant manner, and are associated with familial thoracic aortic aneurysm 4 (MIM: 132900). -

Familial thoracic aortic aneurysm and aortic dissection Benign:3

Likely benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Aug 12, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 17, 2021	This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, 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. -
Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Oct 21, 2019	- -

MYH11-related disorder Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 26, 2024

The MYH11 c.2914G>T variant is predicted to result in the amino acid substitution p.Ala972Ser. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.065% of alleles in individuals of European (non-Finnish) descent in gnomAD. Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

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

Jul 21, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.14
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.47	.;.;.;T
Eigen	Benign	-0.034
Eigen_PC	Benign	0.096
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.96	D;D;D;D
M_CAP	Uncertain	0.13	D
MetaRNN	Benign	0.12	T;T;T;T
MetaSVM	Uncertain	-0.22	T
MutationAssessor	Benign	1.7	.;.;L;L
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-1.9	N;N;.;N
REVEL	Uncertain	0.40
Sift	Benign	0.23	T;T;.;T
Sift4G	Benign	0.37	T;T;T;T
Polyphen		0.0030	.;.;.;B
Vest4		0.24
MVP		0.75
MPC		0.17
ClinPred		0.022	T
GERP RS		4.0
Varity_R		0.13
gMVP		0.18

Splicing

Name	Calibrated prediction	Score	Prediction
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

LitVar

Other links and lift over

dbSNP: rs113696032; hg19: chr16-15834012; COSMIC: COSV99037603; COSMIC: COSV99037603;