10-68121460-G-C

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_032578.4(MYPN):c.22G>C(p.Ala8Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,378 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 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. A8V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MYPN
NM_032578.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.89

Publications

0 publications found

Variant links:

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]

MYPN Gene-Disease associations (from GenCC):

MYPN-related myopathy
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen
cap myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
childhood-onset nemaline myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial isolated restrictive cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
dilated cardiomyopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
dilated cardiomyopathy 1KK
Inheritance: AD Classification: LIMITED Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae)
hypertrophic cardiomyopathy
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

MYPN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.14084047).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYPN	NM_032578.4 link	c.22G>C	p.Ala8Pro	missense_variant	Exon 2 of 20	ENST00000358913.10	NP_115967.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYPN	ENST00000358913.10 link	c.22G>C	p.Ala8Pro	missense_variant	Exon 2 of 20	1	NM_032578.4	ENSP00000351790.5		Q86TC9-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460378

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726424

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33338

American (AMR)

AF:

0.00

AC:

AN:

44392

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26050

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86038

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5720

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111432

Other (OTH)

AF:

0.00

AC:

AN:

60302

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Dilated cardiomyopathy 1KK

Uncertain:1

Nov 08, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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: "Benign"; Align-GVGD: "Class C0"). This sequence change replaces alanine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 8 of the MYPN protein (p.Ala8Pro). This variant is not present in population databases (gnomAD no frequency). 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: 1348029). 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

Apr 13, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.A8P variant (also known as c.22G>C), located in coding exon 1 of the MYPN gene, results from a G to C substitution at nucleotide position 22. The alanine at codon 8 is replaced by proline, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.43

BayesDel_addAF

Benign

-0.055

BayesDel_noAF

Benign

-0.32

CADD

Benign

(source)

DANN

Uncertain

1.0

Eigen

Benign

0.075

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Benign

0.75

LIST_S2

Benign

0.71

T;.;T

M_CAP

Benign

0.016

MetaRNN

Benign

0.14

T;T;T

MetaSVM

Benign

-0.89

MutationAssessor

Benign

1.4

L;L;L

PhyloP100

2.9

PrimateAI

Uncertain

0.57

PROVEAN

Benign

0.35

N;N;N

REVEL

Benign

0.18

Sift

Benign

0.17

T;T;T

Sift4G

Benign

0.39

T;T;T

Polyphen

0.0060

B;B;B

Vest4

0.54

MutPred

0.084

Gain of catalytic residue at A8 (P = 0.0388);Gain of catalytic residue at A8 (P = 0.0388);Gain of catalytic residue at A8 (P = 0.0388);

MVP

0.75

MPC

0.18

ClinPred

0.35

GERP RS

6.0

PromoterAI

-0.014

Neutral

(source)

Varity_R

0.13

gMVP

0.49

Mutation Taster

=68/32

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over