chr17-41769480-C-G

Position:

• chr17-41769480-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP3_Moderate PP5

The NM_002230.4(JUP):​c.406G>C​(p.Asp136His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,460,744 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: JUP NM_002230.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:2
• Conservation: PhyloP100: 7.90

Genes affected

JUP (HGNC:6207): (junction plakoglobin) This gene encodes a major cytoplasmic protein which is the only known constituent common to submembranous plaques of both desmosomes and intermediate junctions. This protein forms distinct complexes with cadherins and desmosomal cadherins and is a member of the catenin family since it contains a distinct repeating amino acid motif called the armadillo repeat. Mutation in this gene has been associated with Naxos disease. Alternative splicing occurs in this gene; however, not all transcripts have been fully described. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.884
• PP5: Variant 17-41769480-C-G is Pathogenic according to our data. Variant chr17-41769480-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 201810.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=2, Likely_pathogenic=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
JUP	NM_002230.4	c.406G>C	p.Asp136His	missense_variant	3/14	ENST00000393931.8	NP_002221.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
JUP	ENST00000393931.8	c.406G>C	p.Asp136His	missense_variant	3/14	1	NM_002230.4	ENSP00000377508.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1460744 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 726620

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: 0.00000270

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000594

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Nov 20, 2013

p.Asp136His (GAT>CAT): c.406 G>C in exon 3 of the JUP gene (NM_002230.2). The Asp136His variant in the JUP gene has not been reported as a disease-causing mutation or as a benign polymorphism to our knowledge. Asp136His results in a non-conservative amino acid substitution of a negatively charged Aspartic acid to a positively charged Histidine at a position that is conserved across species. In silico analysis predicts Asp136His is probably damaging to the protein structure/function. Furthermore, the Asp136His variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The variant is found in ARRHYTHMIA panel(s). -

Cardiovascular phenotype Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 11, 2024

The p.D136H variant (also known as c.406G>C), located in coding exon 2 of the JUP gene, results from a G to C substitution at nucleotide position 406. The aspartic acid at codon 136 is replaced by histidine, 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. -

Naxos disease;C1969081:Arrhythmogenic right ventricular dysplasia 12 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 03, 2023

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. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 201810). This variant has not been reported in the literature in individuals affected with JUP-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces aspartic acid, which is acidic and polar, with histidine, which is basic and polar, at codon 136 of the JUP protein (p.Asp136His). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.27
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.84	D;D;D;.;T;.;T
Eigen	Pathogenic	0.69
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Pathogenic	0.99	.;.;D;D;D;D;D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.88	D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.072	T
MutationAssessor	Uncertain	2.8	M;M;M;.;.;.;.
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-5.6	D;D;D;D;D;D;D
REVEL	Pathogenic	0.68
Sift	Uncertain	0.0010	D;D;D;D;D;D;D
Sift4G	Uncertain	0.0020	D;D;D;.;.;.;.
Polyphen		1.0	D;D;D;.;.;.;.
Vest4		0.89
MutPred		0.59		Loss of solvent accessibility (P = 0.0509);Loss of solvent accessibility (P = 0.0509);Loss of solvent accessibility (P = 0.0509);Loss of solvent accessibility (P = 0.0509);Loss of solvent accessibility (P = 0.0509);Loss of solvent accessibility (P = 0.0509);Loss of solvent accessibility (P = 0.0509);
MVP		0.88
MPC		0.51
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.68
gMVP		0.76

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: rs782392706; hg19: chr17-39925732;