16-15721032-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4 BP6

The NM_002474.3(MYH11):c.4598C>G(p.Ser1533Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000248 in 1,613,852 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). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S1533F) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: MYH11 NM_002474.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 6.82

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]

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, MYH11
• BP4: Computational evidence support a benign effect (MetaRNN=0.42280865).
• BP6: Variant 16-15721032-G-C is Benign according to our data. Variant chr16-15721032-G-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 561305.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH11	NM_002474.3	c.4598C>G	p.Ser1533Cys	missense_variant	33/41	ENST00000300036.6
MYH11	NM_001040113.2	c.4619C>G	p.Ser1540Cys	missense_variant	34/43	ENST00000452625.7
NDE1	NM_017668.3	c.948-3159G>C		intron_variant		ENST00000396354.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH11	ENST00000300036.6	c.4598C>G	p.Ser1533Cys	missense_variant	33/41	1	NM_002474.3	P3
MYH11	ENST00000452625.7	c.4619C>G	p.Ser1540Cys	missense_variant	34/43	1	NM_001040113.2
NDE1	ENST00000396354.6	c.948-3159G>C		intron_variant		1	NM_017668.3	P1

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 152050 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461802 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727212

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 152050 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 74264

Gnomad4 AFR AF: 0.00

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: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Familial thoracic aortic aneurysm and aortic dissection Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 29, 2018

The p.S1533C variant (also known as c.4598C>G), located in coding exon 32 of the MYH11 gene, results from a C to G substitution at nucleotide position 4598. The serine at codon 1533 is replaced by cysteine, an amino acid with dissimilar properties. This amino acid position is well conserved in available vertebrate species; however, cysteine is the reference amino acid in other vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Aortic aneurysm, familial thoracic 4 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

May 23, 2019

This sequence change replaces serine with cysteine at codon 1540 of the MYH11 protein (p.Ser1540Cys). The serine residue is highly conserved and there is a moderate physicochemical difference between serine and cysteine. 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. 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: "Benign"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with MYH11-related conditions. ClinVar contains an entry for this variant (Variation ID: 561305). This variant is not present in population databases (ExAC no frequency). -

Connective tissue disorder Benign:1

Likely benign, criteria provided, single submitter

clinical testing

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

Jun 01, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.070
Cadd	Pathogenic	27
Dann	Uncertain	0.99
Eigen	Benign	0.16
Eigen_PC	Uncertain	0.29
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.86	D;D;D;D
M_CAP	Uncertain	0.10	D
MetaRNN	Benign	0.42	T;T;T;T
MetaSVM	Uncertain	-0.047	T
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.83	D
PROVEAN	Uncertain	-2.6	D;D;.;D
REVEL	Uncertain	0.47
Sift	Uncertain	0.0080	D;D;.;D
Sift4G	Uncertain	0.0080	D;D;D;D
Polyphen		0.015	.;.;.;B
Vest4		0.36
MutPred		0.56		.;.;Gain of methylation at K1532 (P = 0.0151);Gain of methylation at K1532 (P = 0.0151);
MVP		0.77
MPC		0.17
ClinPred		0.98	D
GERP RS		4.9
Varity_R		0.39
gMVP		0.30

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: rs748529935; hg19: chr16-15814889;