rs138158369

chr22-36286753-T-C

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 1P and 9B. PP2 BP6 BS1 BS2

The NM_002473.6(MYH9):c.5026A>G(p.Lys1676Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000546 in 1,613,138 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00043 (1 hom., cov: 33)
  • Exomes 𝑓: 0.00056 (0 hom.)
• Consequence: MYH9 NM_002473.6 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:7
• Conservation: PhyloP100: 7.63

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 Benign. Variant got -8 ACMG points.

• PP2: Missense variant where missense usually causes diseases, MYH9
• BP6: Variant 22-36286753-T-C is Benign according to our data. Variant chr22-36286753-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 164421.We mark this variant Likely_benign, oryginal submissions are: {Benign=2, Likely_benign=5, Uncertain_significance=2}.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000434 (66/152220) while in subpopulation NFE AF= 0.000735 (50/68042). AF 95% confidence interval is 0.000572. There are 1 homozygotes in gnomad4. There are 26 alleles in male gnomad4 subpopulation. This position pass quality control queck.
• BS2: High AC in GnomAd at 66 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH9	NM_002473.6	c.5026A>G	p.Lys1676Glu	missense_variant	35/41	ENST00000216181.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH9	ENST00000216181.11	c.5026A>G	p.Lys1676Glu	missense_variant	35/41	1	NM_002473.6	P1
MYH9	ENST00000685801.1	c.5089A>G	p.Lys1697Glu	missense_variant	36/42
MYH9	ENST00000685708.1	n.1459A>G		non_coding_transcript_exon_variant	1/7
MYH9	ENST00000691109.1	n.5321A>G		non_coding_transcript_exon_variant	29/35

Frequencies

GnomAD3 genomes AF: 0.000434 AC: 66 AN: 152220 Hom.: 1 Cov.: 33

Gnomad AFR AF: 0.000193

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00173

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000735

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000331 AC: 83 AN: 250738 Hom.: 0 AF XY: 0.000339 AC XY: 46 AN XY: 135562

Gnomad AFR exome AF: 0.000185

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00119

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000572

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000557 AC: 814 AN: 1460918 Hom.: 0 Cov.: 32 AF XY: 0.000556 AC XY: 404 AN XY: 726782

Gnomad4 AFR exome AF: 0.000119

Gnomad4 AMR exome AF: 0.0000447

Gnomad4 ASJ exome AF: 0.00184

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000655

Gnomad4 OTH exome AF: 0.000480

GnomAD4 genome AF: 0.000434 AC: 66 AN: 152220 Hom.: 1 Cov.: 33 AF XY: 0.000350 AC XY: 26 AN XY: 74364

Gnomad4 AFR AF: 0.000193

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00173

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000735

Gnomad4 OTH AF: 0.000478

Alfa AF: 0.000718 Hom.: 0

Bravo AF: 0.000412

TwinsUK AF: 0.000539 AC: 2

ALSPAC AF: 0.000259 AC: 1

ESP6500AA AF: 0.000681 AC: 3

ESP6500EA AF: 0.000930 AC: 8

ExAC AF: 0.000272 AC: 33

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.000709

EpiControl AF: 0.000474

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:7

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Benign:3

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	May 01, 2022	MYH9: PP2, BS2 -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 12, 2022	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
Likely benign, criteria provided, single submitter	clinical testing	Invitae	Jan 02, 2024	- -

not specified Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	May 09, 2013	The Lys1676Glu variant in MYH9 has not been reported in individuals affected wit h hearing loss, but has been identified in 0.1% (8/8600) of European American ch romosomes in a broad population by the NHLBI Exome sequencing project (http://ev s.gs.washington.edu/EVS/; dbSNP rs138158369). Although this variant has been see n in the general population, a pathogenic role cannot be ruled out due to variab le expressivity and onset of hearing loss associated with MYH9 variants (Pecci 2 008). Computational analyses (biochemical amino acid properties, conservation, A lignGVGD, PolyPhen2, and SIFT) do not provide strong support for or against an i mpact to the protein. In summary, additional data is needed to determine the cli nical significance of this variant. -
Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Aug 01, 2023	Variant summary: MYH9 c.5026A>G (p.Lys1676Glu) results in a conservative amino acid change located in the myosin tail domain (IPR002928) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00033 in 250738 control chromosomes (gnomAD). To our knowledge, no occurrence of c.5026A>G in individuals affected with Macrothrombocytopenia And Granulocyte Inclusions With Or Without Nephritis Or Sensorineural Hearing Loss and no experimental evidence demonstrating its impact on protein function have been reported. Six submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as uncertain significance. -

MYH9-related disorder Benign:2

Likely benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Mar 21, 2022	This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Autosomal dominant nonsyndromic hearing loss 17 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Hearing impairment Benign:1

Benign, criteria provided, single submitter

clinical testing

Department of Otolaryngology – Head & Neck Surgery, Cochlear Implant Center

Apr 12, 2021

PP3_Supporting, BS1_Strong, BS2_Strong -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.87
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Uncertain	-0.080
Cadd	Pathogenic	26
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.65	D
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Uncertain	0.17	D
MetaRNN	Uncertain	0.60	D
MetaSVM	Uncertain	0.090	D
MutationAssessor	Pathogenic	3.1	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.73	T
PROVEAN	Uncertain	-3.4	D
REVEL	Uncertain	0.64
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.043	D
Polyphen		0.58	P
Vest4		0.81
MVP		0.80
MPC		1.2
ClinPred		0.55	D
GERP RS		5.4
Varity_R		0.78
gMVP		0.37

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: rs138158369; hg19: chr22-36682799; COSMIC: COSV53393024; COSMIC: COSV53393024;