16-15737618-G-C

Variant names:

• chr16-15737618-G-C
• rs774490005
• NM_002474.3:c.3124C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_002474.3(MYH11):​c.3124C>G​(p.Arg1042Gly) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,459,700 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1042Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: MYH11 NM_002474.3 missense, splice_region
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.05
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• familial thoracic aortic aneurysm and aortic dissection

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• aortic aneurysm, familial thoracic 4

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• megacystis-microcolon-intestinal hypoperistalsis syndrome 2

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• megacystis-microcolon-intestinal hypoperistalsis syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• visceral myopathy 2

  Inheritance: AR, AD Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.831

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYH11	NM_002474.3	c.3124C>G	p.Arg1042Gly	missense_variant, splice_region_variant	Exon 25 of 41	ENST00000300036.6	NP_002465.1
MYH11	NM_001040113.2	c.3145C>G	p.Arg1049Gly	missense_variant, splice_region_variant	Exon 26 of 43	ENST00000452625.7	NP_001035202.1
MYH11	NM_001040114.2	c.3145C>G	p.Arg1049Gly	missense_variant, splice_region_variant	Exon 26 of 42		NP_001035203.1
MYH11	NM_022844.3	c.3124C>G	p.Arg1042Gly	missense_variant, splice_region_variant	Exon 25 of 42		NP_074035.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYH11	ENST00000300036.6	c.3124C>G	p.Arg1042Gly	missense_variant, splice_region_variant	Exon 25 of 41	1	NM_002474.3	ENSP00000300036.5
MYH11	ENST00000452625.7	c.3145C>G	p.Arg1049Gly	missense_variant, splice_region_variant	Exon 26 of 43	1	NM_001040113.2	ENSP00000407821.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1459700 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2 AN XY: 726248

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000348 AC: 3 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51310

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111962

Other (OTH) AF: 0.00 AC: 0 AN: 60364

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.43
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.80	.;.;.;D
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D;D;D;D
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.83	D;D;D;D
MetaSVM	Pathogenic	0.85	D
MutationAssessor	Uncertain	2.5	.;.;M;M
PhyloP100		8.0
PrimateAI	Pathogenic	0.85	D
PROVEAN	Pathogenic	-6.1	D;D;.;D
REVEL	Pathogenic	0.82
Sift	Benign	0.056	T;T;.;T
Sift4G	Uncertain	0.040	D;D;D;D
Polyphen		0.96	.;.;.;D
Vest4		0.85
MutPred		0.35		.;.;Loss of MoRF binding (P = 0.025);Loss of MoRF binding (P = 0.025);
MVP		0.93
MPC		0.82
ClinPred		0.99	D
GERP RS		3.6
Varity_R		0.65
gMVP		0.52
Mutation Taster		=70/30	polymorphism

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

Other links and lift over

dbSNP: rs774490005; hg19: chr16-15831475;