rs797044436

Variant names:

• chr2-108910783-CTCTT-C
• rs797044436
• NM_022336.4:c.719_722delAAGA

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1 PP5_Very_Strong

The NM_022336.4(EDAR):​c.719_722delAAGA​(p.Lys240ArgfsTer7) variant causes a frameshift change. The variant allele was found at a frequency of 0.00000496 in 1,613,174 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: EDAR NM_022336.4 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 5.29

Genes affected

EDAR (HGNC:2895): (ectodysplasin A receptor) This gene encodes a member of the tumor necrosis factor receptor family. The encoded transmembrane protein is a receptor for the soluble ligand ectodysplasin A, and can activate the nuclear factor-kappaB, JNK, and caspase-independent cell death pathways. It is required for the development of hair, teeth, and other ectodermal derivatives. Mutations in this gene result in autosomal dominant and recessive forms of hypohidrotic ectodermal dysplasia. [provided by RefSeq, Jul 2008]

RANBP2 (HGNC:9848): (RAN binding protein 2) RAN is a small GTP-binding protein of the RAS superfamily that is associated with the nuclear membrane and is thought to control a variety of cellular functions through its interactions with other proteins. This gene encodes a very large RAN-binding protein that immunolocalizes to the nuclear pore complex. The protein is a giant scaffold and mosaic cyclophilin-related nucleoporin implicated in the Ran-GTPase cycle. The encoded protein directly interacts with the E2 enzyme UBC9 and strongly enhances SUMO1 transfer from UBC9 to the SUMO1 target SP100. These findings place sumoylation at the cytoplasmic filaments of the nuclear pore complex and suggest that, for some substrates, modification and nuclear import are linked events. This gene is partially duplicated in a gene cluster that lies in a hot spot for recombination on chromosome 2q. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 16 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PP5: Variant 2-108910783-CTCTT-C is Pathogenic according to our data. Variant chr2-108910783-CTCTT-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 5859.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EDAR	NM_022336.4	c.719_722delAAGA	p.Lys240ArgfsTer7	frameshift_variant	Exon 8 of 12	ENST00000258443.7	NP_071731.1
EDAR	XM_006712204.2	c.815_818delAAGA	p.Lys272ArgfsTer7	frameshift_variant	Exon 7 of 11		XP_006712267.1
RANBP2	XM_047445367.1	c.8370+137742_8370+137745delTCTT		intron_variant	Intron 24 of 24		XP_047301323.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EDAR	ENST00000258443.7	c.719_722delAAGA	p.Lys240ArgfsTer7	frameshift_variant	Exon 8 of 12	1	NM_022336.4	ENSP00000258443.2
EDAR	ENST00000376651.1	c.815_818delAAGA	p.Lys272ArgfsTer7	frameshift_variant	Exon 7 of 11	2		ENSP00000365839.1
EDAR	ENST00000409271.5	c.815_818delAAGA	p.Lys272ArgfsTer7	frameshift_variant	Exon 8 of 12	2		ENSP00000386371.1

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151992 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000416

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251210 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135778

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461064 Hom.: 0 AF XY: 0.00000550 AC XY: 4 AN XY: 726806

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: 0.0000580

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152110 Hom.: 0 Cov.: 31 AF XY: 0.0000404 AC XY: 3 AN XY: 74342

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000624

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Ectodermal dysplasia 10B, hypohidrotic/hair/tooth type, autosomal recessive Pathogenic:3

Jul 01, 2005

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The EDAR c.719_722delAAGA (p.Lys240ArgfsTer7) variant has been reported in two studies and is found in a homozygous state in four patients from two consanguineous families with hypohidrotic ectodermal dysplasia (Naeem et al. 2005; Bashyam et al. 2012). Three of these patients were from the same family (Naeem et al. 2005). The p.Lys240ArgfsTer7 variant was also present in five unaffected heterozygous carriers, two from one family and three from the other including both parents and one sister. Control data are unavailable for this variant and it is not found in the 1000 Genomes Project, the Exome Sequencing Project, or the Exome Aggregation Consortium. The p.Lys240ArgfsTer7 variant has not been reported in association with autosomal dominant HED. Based on the evidence and due to the potential impact of frameshift variants, the p.Lys240ArgfsTer7 variant is classified as likely pathogenic for autosomal recessive hypohidrotic ectodermal dysplasia. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Jan 03, 2022

3billion

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Frameshift: predicted to result in a loss or disruption of normal protein function through nonsense-mediated decay (NMD) or protein truncation. Multiple pathogenic variants are reported downstream of the variant (PVS1_VS). The variant has been reported at least twice as pathogenic/likely pathogenic with clinical assertions and evidence for the classification (ClinVar ID: VCV000005859, PMID:16029325).It is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.000004, PM2_M). Therefore, this variant is classified as pathogenic according to the recommendation of ACMG/AMP guideline. -

Computational scores

Source: dbNSFP v4.3

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: rs797044436; hg19: chr2-109527239;