rs146336815

Positions:

• chr10-68122283-A-G

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP3 BS1_Supporting BS2

The NM_032578.4(MYPN):​c.845A>G​(p.Glu282Gly) variant causes a missense change. The variant allele was found at a frequency of 0.000169 in 1,613,984 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.00015 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00017 (1 hom.)
• Consequence: MYPN NM_032578.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:8
• Conservation: PhyloP100: 6.71

Genes affected

MYPN (HGNC:23246): (myopalladin) Striated muscle in vertebrates comprises large proteins which must be organized properly to contract efficiently. Z-lines in striated muscle are a sign of this organization, representing the ends of actin thin filaments, titin, nebulin or nebulette and accessory proteins required for structure and function. This gene encodes a protein which interacts with nebulin in skeletal muscle or nebulette in cardiac muscle and alpha-actinin. In addition, this gene product can interact with a protein with the I-band indicating it has a regulatory as well as structural function. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2011]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.825
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000151 (23/152330) while in subpopulation NFE AF= 0.000265 (18/68028). AF 95% confidence interval is 0.000171. There are 0 homozygotes in gnomad4. There are 13 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High AC in GnomAd4 at 23 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYPN	NM_032578.4	c.845A>G	p.Glu282Gly	missense_variant	2/20	ENST00000358913.10	NP_115967.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYPN	ENST00000358913.10	c.845A>G	p.Glu282Gly	missense_variant	2/20	1	NM_032578.4	ENSP00000351790	P1

Frequencies

GnomAD3 genomes AF: 0.000151 AC: 23 AN: 152212 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000724

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: 0.000265

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000112 AC: 28 AN: 249776 Hom.: 0 AF XY: 0.000133 AC XY: 18 AN XY: 135336

Gnomad AFR exome AF: 0.0000637

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000239

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000170 AC: 249 AN: 1461654 Hom.: 1 Cov.: 31 AF XY: 0.000147 AC XY: 107 AN XY: 727106

Gnomad4 AFR exome AF: 0.0000598

Gnomad4 AMR exome AF: 0.0000447

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: 0.000215

Gnomad4 OTH exome AF: 0.0000994

GnomAD4 genome AF: 0.000151 AC: 23 AN: 152330 Hom.: 0 Cov.: 32 AF XY: 0.000175 AC XY: 13 AN XY: 74494

Gnomad4 AFR AF: 0.0000722

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: 0.000265

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000285 Hom.: 0

Bravo AF: 0.000151

TwinsUK AF: 0.000270 AC: 1

ALSPAC AF: 0.00 AC: 0

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000233 AC: 2

ExAC AF: 0.000157 AC: 19

EpiCase AF: 0.000436

EpiControl AF: 0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:8

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:5

Uncertain significance, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Clinical Genetics Laboratory, Skane University Hospital Lund	May 27, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Mar 01, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 10, 2022	Has not been previously published as pathogenic or benign to our knowledge; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function -

Dilated cardiomyopathy 1KK Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 17, 2022

This sequence change replaces glutamic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 282 of the MYPN protein (p.Glu282Gly). This variant is present in population databases (rs146336815, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with MYPN-related conditions. ClinVar contains an entry for this variant (Variation ID: 201881). 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: "Probably Damaging"; Align-GVGD: "Class C15"). 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. -

Cardiovascular phenotype Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 02, 2022

The p.E282G variant (also known as c.845A>G), located in coding exon 1 of the MYPN gene, results from an A to G substitution at nucleotide position 845. The glutamic acid at codon 282 is replaced by glycine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Dilated cardiomyopathy 1KK;C4479186:MYPN-related myopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Aug 11, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.64
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Pathogenic	0.26
CADD	Uncertain	26
DANN	Pathogenic	1.0
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.93	D;.;D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.82	D;D;D
MetaSVM	Uncertain	0.58	D
MutationAssessor	Pathogenic	2.9	M;M;M
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-4.3	D;D;D
REVEL	Pathogenic	0.78
Sift	Uncertain	0.0010	D;D;D
Sift4G	Uncertain	0.019	D;D;D
Polyphen		1.0	D;D;D
Vest4		0.76
MVP		0.89
MPC		0.66
ClinPred		0.92	D
GERP RS		5.8
Varity_R		0.58
gMVP		0.73

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs146336815; hg19: chr10-69882040;