17-41757682-C-G

Variant names:

• chr17-41757682-C-G
• rs782547688
• NM_002230.4:c.1876G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_002230.4(JUP):​c.1876G>C​(p.Ala626Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. A626T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: JUP NM_002230.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.69
• Publications: 0 publications found

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]

JUP Gene-Disease associations (from GenCC):

• arrhythmogenic right ventricular dysplasia 12

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• inherited epidermolysis bullosa

  Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
• Naxos disease

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, G2P, Orphanet, PanelApp Australia, Labcorp Genetics (formerly Invitae)
• lethal acantholytic epidermolysis bullosa

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.9

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
JUP	NM_002230.4	c.1876G>C	p.Ala626Pro	missense_variant	Exon 11 of 14	ENST00000393931.8	NP_002221.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
JUP	ENST00000393931.8	c.1876G>C	p.Ala626Pro	missense_variant	Exon 11 of 14	1	NM_002230.4	ENSP00000377508.3
JUP	ENST00000310706.9	c.1876G>C	p.Ala626Pro	missense_variant	Exon 11 of 15	1		ENSP00000311113.5
JUP	ENST00000393930.5	c.1876G>C	p.Ala626Pro	missense_variant	Exon 11 of 15	5		ENSP00000377507.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 38

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

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

Apr 05, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. 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 variant has not been reported in the literature in individuals with JUP-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces alanine with proline at codon 626 of the JUP protein (p.Ala626Pro). The alanine residue is moderately conserved and there is a small physicochemical difference between alanine and proline. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.20
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.80	D;D;D
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.96	.;.;D
M_CAP	Benign	0.048	D
MetaRNN	Pathogenic	0.90	D;D;D
MetaSVM	Uncertain	-0.24	T
MutationAssessor	Uncertain	2.1	M;M;M
PhyloP100		7.7
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-4.0	D;D;D
REVEL	Uncertain	0.56
Sift	Benign	0.098	T;T;T
Sift4G	Benign	0.090	T;T;T
Polyphen		1.0	D;D;D
Vest4		0.96
MutPred		0.67		Gain of disorder (P = 0.0667);Gain of disorder (P = 0.0667);Gain of disorder (P = 0.0667);
MVP		0.86
MPC		0.77
ClinPred		0.96	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.82
gMVP		0.91

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

Other links and lift over

dbSNP: rs782547688; hg19: chr17-39913934;