16-15718341-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BS1_Supporting

The NM_002474.3(MYH11):c.5269G>A(p.Asp1757Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000435 in 1,608,918 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D1757E) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

MYH11
NM_002474.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:1

Conservation

PhyloP100: 7.67

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 links:

NDE1 (HGNC:17619): (nudE neurodevelopment protein 1) This gene encodes a member of the nuclear distribution E (NudE) family of proteins. The encoded protein is localized at the centrosome and interacts with other centrosome components as part of a multiprotein complex that regulates dynein function. This protein plays an essential role in microtubule organization, mitosis and neuronal migration. Mutations in this gene cause lissencephaly 4, a disorder characterized by lissencephaly, severe brain atrophy, microcephaly, and severe cognitive disability. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2012]

NDE1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000151 (23/152168) while in subpopulation AFR AF= 0.000507 (21/41438). AF 95% confidence interval is 0.000339. There are 0 homozygotes in gnomad4. There are 10 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYH11	NM_002474.3 link	c.5269G>A	p.Asp1757Asn	missense_variant	Exon 37 of 41	ENST00000300036.6	NP_002465.1	P35749-1A0A024QZJ4
MYH11	NM_001040113.2 link	c.5290G>A	p.Asp1764Asn	missense_variant	Exon 38 of 43	ENST00000452625.7	NP_001035202.1	P35749-3
NDE1	NM_017668.3 link	c.948-5850C>T		intron_variant	Intron 8 of 8	ENST00000396354.6	NP_060138.1	Q9NXR1-2X5DR54

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MYH11	ENST00000300036.6 link	c.5269G>A	p.Asp1757Asn	missense_variant	Exon 37 of 41	1	NM_002474.3	ENSP00000300036.5	P35749-1
MYH11	ENST00000452625.7 link	c.5290G>A	p.Asp1764Asn	missense_variant	Exon 38 of 43	1	NM_001040113.2	ENSP00000407821.2	P35749-3
NDE1	ENST00000396354.6 link	c.948-5850C>T		intron_variant	Intron 8 of 8	1	NM_017668.3	ENSP00000379642.1	Q9NXR1-2

Frequencies

GnomAD3 genomes

AF:

0.000151

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000507

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000404

AC:

AN:

247496

Hom.:

AF XY:

0.0000373

AC XY:

AN XY:

134084

show subpopulations

Gnomad AFR exome

AF:

0.000309

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.0000545

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000323

AC:

AN:

1456750

Hom.:

Cov.:

AF XY:

0.0000304

AC XY:

AN XY:

724828

show subpopulations

Gnomad4 AFR exome

AF:

0.000508

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.0000205

Gnomad4 NFE exome

AF:

0.0000207

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.000151

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

74334

show subpopulations

Gnomad4 AFR

AF:

0.000507

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000509

Hom.:

Bravo

AF:

0.000121

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1Benign:1

Jan 10, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.D1757N variant (also known as c.5269G>A), located in coding exon 36 of the MYH11 gene, results from a G to A substitution at nucleotide position 5269. The aspartic acid at codon 1757 is replaced by asparagine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Jul 31, 2024

Color Diagnostics, LLC DBA Color Health

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aortic aneurysm, familial thoracic 4

Uncertain:1

Aug 31, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 1764 of the MYH11 protein (p.Asp1764Asn). This variant is present in population databases (rs752996609, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with MYH11-related conditions. ClinVar contains an entry for this variant (Variation ID: 201083). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided

Uncertain:1

Sep 16, 2015

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The D1757N variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. However, it has been seen in multiple individuals referred for TAAD testing at GeneDx. Furthermore, the D1757N variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. This variant is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. This substitution occurs at a position where amino acids with similar properties to Aspartic acid are tolerated across species, and in silico analysis predicts this variant is probably damaging to the protein structure/function. Nonetheless, additional evidence is needed to determine whether this variant is pathogenic or benign. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.22

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.72

.;.;.;D

Eigen

Pathogenic

0.78

Eigen_PC

Pathogenic

0.68

FATHMM_MKL

Uncertain

0.96

LIST_S2

Pathogenic

0.98

D;D;D;D

M_CAP

Uncertain

0.22

MetaRNN

Uncertain

0.74

D;D;D;D

MetaSVM

Uncertain

0.67

MutationAssessor

Pathogenic

3.5

.;.;M;M

PrimateAI

Uncertain

0.63

PROVEAN

Uncertain

-3.8

D;D;.;D

REVEL

Pathogenic

0.65

Sift

Uncertain

0.0010

D;D;.;D

Sift4G

Uncertain

0.0050

D;D;D;D

Polyphen

1.0

.;.;.;D

Vest4

0.59

MVP

0.87

MPC

0.52

ClinPred

0.92

GERP RS

4.7

Varity_R

0.60

gMVP

0.34

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over