rs142824472

Positions:

• chr16-15718326-C-T

Variant summary

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

The ENST00000300036.6(MYH11):​c.5284G>A​(p.Ala1762Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. 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. A1762P) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MYH11 ENST00000300036.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.28

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• 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=0.27111256).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH11	NM_002474.3	c.5284G>A	p.Ala1762Thr	missense_variant	37/41	ENST00000300036.6	NP_002465.1
MYH11	NM_001040113.2	c.5305G>A	p.Ala1769Thr	missense_variant	38/43	ENST00000452625.7	NP_001035202.1
NDE1	NM_017668.3	c.948-5865C>T		intron_variant		ENST00000396354.6	NP_060138.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYH11	ENST00000300036.6	c.5284G>A	p.Ala1762Thr	missense_variant	37/41	1	NM_002474.3	ENSP00000300036	P3
MYH11	ENST00000452625.7	c.5305G>A	p.Ala1769Thr	missense_variant	38/43	1	NM_001040113.2	ENSP00000407821
NDE1	ENST00000396354.6	c.948-5865C>T		intron_variant		1	NM_017668.3	ENSP00000379642	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ESP6500AA AF: 0.000228 AC: 1

ESP6500EA AF: 0.00 AC: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Aortic aneurysm, familial thoracic 4 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 23, 2017

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 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 disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces alanine with threonine at codon 1769 of the MYH11 protein (p.Ala1769Thr). The alanine residue is highly conserved and there is a small physicochemical difference between alanine and threonine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.023	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.46	.;.;.;T
Eigen	Benign	0.011
Eigen_PC	Benign	0.14
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Uncertain	0.93	D;D;D;D
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.27	T;T;T;T
MetaSVM	Uncertain	-0.14	T
MutationAssessor	Benign	1.7	.;.;L;L
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-1.2	N;N;.;N
REVEL	Uncertain	0.32
Sift	Benign	0.19	T;T;.;T
Sift4G	Benign	0.11	T;T;T;T
Polyphen		0.0090	.;.;.;B
Vest4		0.24
MVP		0.59
MPC		0.35
ClinPred		0.89	D
GERP RS		4.7
Varity_R		0.095
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: rs142824472; hg19: chr16-15812183;