1-179552619-CTT-C

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_014625.4(NPHS2):c.855_856delAA(p.Arg286ThrfsTer17) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000136 in 1,613,646 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

NPHS2
NM_014625.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:17

Conservation

PhyloP100: 1.66

Variant links:

Genes affected

NPHS2 (HGNC:13394): (NPHS2 stomatin family member, podocin) This gene encodes a protein that plays a role in the regulation of glomerular permeability. Mutations in this gene cause steroid-resistant nephrotic syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

NPHS2 links:

AXDND1 (HGNC:26564): (axonemal dynein light chain domain containing 1)

AXDND1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. There are 55 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 1-179552619-CTT-C is Pathogenic according to our data. Variant chr1-179552619-CTT-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 188823.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-179552619-CTT-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NPHS2	NM_014625.4 link	c.855_856delAA	p.Arg286ThrfsTer17	frameshift_variant	Exon 7 of 8	ENST00000367615.9	NP_055440.1	Q9NP85-1
AXDND1	NM_144696.6 link	c.3032-1891_3032-1890delTT		intron_variant	Intron 25 of 25	ENST00000367618.8	NP_653297.3	Q5T1B0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NPHS2	ENST00000367615.9 link	c.855_856delAA	p.Arg286ThrfsTer17	frameshift_variant	Exon 7 of 8	1	NM_014625.4	ENSP00000356587.4		Q9NP85-1
AXDND1	ENST00000367618.8 link	c.3032-1891_3032-1890delTT		intron_variant	Intron 25 of 25	1	NM_144696.6	ENSP00000356590.3		Q5T1B0-1

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000680

AC:

AN:

250072

Hom.:

AF XY:

0.0000739

AC XY:

AN XY:

135240

show subpopulations

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000150

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000141

AC:

206

AN:

1461462

Hom.:

AF XY:

0.000127

AC XY:

AN XY:

727018

show subpopulations

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:

0.000175

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.0000920

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74356

show subpopulations

Gnomad4 AFR

AF:

0.0000724

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000377

Hom.:

Bravo

AF:

0.0000907

EpiCase

AF:

0.000218

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:17

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Nephrotic syndrome, type 2

Pathogenic:8

Mar 27, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 13, 2021

Revvity Omics, Revvity

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 11, 2023

Genome-Nilou Lab

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 01, 2018

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: NPHS2 c.855_856delAA (p.Arg286ThrfsX17) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. The variant allele was found at a frequency of 6.5e-05 in 275798 control chromosomes. This frequency is not significantly higher than expected for a pathogenic variant in NPHS2 causing Nephrotic Syndrome, Type 2 (6.5e-05 vs 0.0018), allowing no conclusion about variant significance. c.855_856delAA has been reported in the literature in multiple individuals affected with Steroid Resistant Nephrotic Syndrome. These data indicate that the variant is very likely to be associated with disease. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as pathogenic. -

Apr 01, 2000

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jan 01, 2024

Daryl Scott Lab, Baylor College of Medicine

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PVS1_moderate, PS4 -

Jan 03, 2020

Myriad Genetics, Inc.

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

NM_014625.2(NPHS2):c.855_856delAA(R286Tfs*17) is classified as pathogenic in the context of NPHS2-related nephrotic syndrome. Sources cited for classification include the following: PMID 11805166, 18823551, 19406966, 24742477 and 15327385. Classification of NM_014625.2(NPHS2):c.855_856delAA(R286Tfs*17) is based on the following criteria: The variant causes a premature termination codon that is not expected to be targeted by nonsense-mediated mRNA decay; however, literature evidence strongly supports pathogenicity. Please note: this variant was assessed in the context of healthy population screening. -

Apr 09, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Pathogenic:3

Jul 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Arg286Thrfs*17) in the NPHS2 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 98 amino acid(s) of the NPHS2 protein. This variant is present in population databases (rs749740335, gnomAD 0.01%). This premature translational stop signal has been observed in individuals with steroid resistant nephrotic syndrome (PMID: 11805166, 18823551, 20947785, 21355056, 24509478). ClinVar contains an entry for this variant (Variation ID: 188823). For these reasons, this variant has been classified as Pathogenic. -

Dec 15, 2022

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Frameshift variant in the C-terminus predicted to result in protein truncation, as the last 98 amino acids are lost and replaced with 16 incorrect amino acids (HGMD); This variant is associated with the following publications: (PMID: 24227627, 18823551, 12464671, 30295827, 15769810, 15327385, 15253708, 15322893, 30260545, 30655312, 25949442, 14978175, 11805166, 10742096, 17699384, 19145239, 32581362, 33144682, 31589614, 33226606) -

Dec 01, 2017

Eurofins Ntd Llc (ga)

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Focal segmental glomerulosclerosis

Pathogenic:2

Dec 30, 2020

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 17, 2019

Yale Center for Mendelian Genomics, Yale University

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Nephrotic range proteinuria

Pathogenic:1

NIHR Bioresource Rare Diseases, University of Cambridge

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Chronic kidney disease

Pathogenic:1

May 28, 2020

Cavalleri Lab, Royal College of Surgeons in Ireland

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

PVS1, PM3 -

Steroid-resistant nephrotic syndrome

Pathogenic:1

Sep 16, 2020

Natera, Inc.

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

NPHS2-related disorder

Pathogenic:1

Jun 20, 2024

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The NPHS2 c.855_856delAA variant is predicted to result in a frameshift and premature protein termination (p.Arg286Thrfs*17). Also known as Q285fsX302 or R285fx302X, this variant has been reported to be pathogenic for steroid-resistant nephrotic syndrome (SRNS) (Boute et al. 2000. PubMed ID: 10742096; Machuca et al. 2009. PubMed ID: 19145239; Santín et al. 2011. PubMed ID: 20947785). This variant is reported in 0.016% of alleles in individuals of European (non-Finnish) descent in gnomAD. Frameshift variants in NPHS2 are expected to be pathogenic. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over