rs727503291

Positions:

• chr22-36320807-G-A

Variant summary

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

The NM_002473.6(MYH9):​c.859C>T​(p.His287Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,084 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 Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MYH9 NM_002473.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.59

Genes affected

MYH9 (HGNC:7579): (myosin heavy chain 9) This gene encodes a conventional non-muscle myosin; this protein should not be confused with the unconventional myosin-9a or 9b (MYO9A or MYO9B). The encoded protein is a myosin IIA heavy chain that contains an IQ domain and a myosin head-like domain which is involved in several important functions, including cytokinesis, cell motility and maintenance of cell shape. Defects in this gene have been associated with non-syndromic sensorineural deafness autosomal dominant type 17, Epstein syndrome, Alport syndrome with macrothrombocytopenia, Sebastian syndrome, Fechtner syndrome and macrothrombocytopenia with progressive sensorineural deafness. [provided by RefSeq, Dec 2011]

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), MYH9. . Gene score misZ: 3.473 (greater than the threshold 3.09). Trascript score misZ: 6.1231 (greater than threshold 3.09). The gene has 43 curated pathogenic missense variants (we use a threshold of 10). The gene has 84 curated benign missense variants. GenCC has associacion of the gene with May-Hegglin anomaly, autosomal dominant nonsyndromic hearing loss, macrothrombocytopenia and granulocyte inclusions with or without nephritis or sensorineural hearing loss, autosomal dominant nonsyndromic hearing loss 17.
• BP4: Computational evidence support a benign effect (MetaRNN=0.31907192).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH9	NM_002473.6	c.859C>T	p.His287Tyr	missense_variant	8/41	ENST00000216181.11	NP_002464.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYH9	ENST00000216181.11	c.859C>T	p.His287Tyr	missense_variant	8/41	1	NM_002473.6	ENSP00000216181.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461084 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726874

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: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Mar 18, 2013

Variant classified as Uncertain Significance - Favor Benign. The His287Tyr varia nt in MYH9 has not been reported in affected individuals or in large population studies. This variant is not well conserved across species and computational ana lyses (biochemical amino acid properties, AlignGVGD, PolyPhen2, and SIFT) sugges t that the His287Tyr variant may not impact the protein. However, this informati on is not predictive enough to rule out pathogenicity. In summary, the clinical significance of this variant cannot be determined with certainty; however based upon conservation data and computational predictions, we would lean towards a mo re likely benign role. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Uncertain	0.019	T
BayesDel_noAF	Benign	-0.21
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.60	D
Eigen	Benign	0.10
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.82	T
M_CAP	Benign	0.071	D
MetaRNN	Benign	0.32	T
MetaSVM	Uncertain	0.055	D
MutationAssessor	Benign	1.0	L
PrimateAI	Uncertain	0.70	T
PROVEAN	Uncertain	-2.5	D
REVEL	Uncertain	0.42
Sift	Uncertain	0.013	D
Sift4G	Uncertain	0.011	D
Polyphen		0.38	B
Vest4		0.26
MutPred		0.31		Gain of phosphorylation at H287 (P = 0.0716);
MVP		0.75
MPC		1.5
ClinPred		0.88	D
GERP RS		4.1
RBP_binding_hub_radar		1.0
RBP_regulation_power_radar		2.2
Varity_R		0.40
gMVP		0.34

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs727503291; hg19: chr22-36716852;