rs386833932

Positions:

• chr19-35851346-C-T

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM1 PM2 PP3_Strong PP5_Very_Strong

The NM_004646.4(NPHS1):​c.313G>A​(p.Asp105Asn) variant causes a missense change. The variant allele was found at a frequency of 0.0000031 in 1,613,538 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 Likely pathogenic (★★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: NPHS1 NM_004646.4 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:6 U:1
• Conservation: PhyloP100: 5.25

Genes affected

NPHS1 (HGNC:7908): (NPHS1 adhesion molecule, nephrin) This gene encodes a member of the immunoglobulin family of cell adhesion molecules that functions in the glomerular filtration barrier in the kidney. The gene is primarily expressed in renal tissues, and the protein is a type-1 transmembrane protein found at the slit diaphragm of glomerular podocytes. The slit diaphragm is thought to function as an ultrafilter to exclude albumin and other plasma macromolecules in the formation of urine. Mutations in this gene result in Finnish-type congenital nephrosis 1, characterized by severe proteinuria and loss of the slit diaphragm and foot processes.[provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Pathogenic. Variant got 16 ACMG points.

• PM1: In a domain Ig-like C2-type 1 (size 103) in uniprot entity NPHN_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_004646.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99
• PP5: Variant 19-35851346-C-T is Pathogenic according to our data. Variant chr19-35851346-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 56493.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr19-35851346-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NPHS1	NM_004646.4	c.313G>A	p.Asp105Asn	missense_variant	3/29	ENST00000378910.10	NP_004637.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NPHS1	ENST00000378910.10	c.313G>A	p.Asp105Asn	missense_variant	3/29	1	NM_004646.4	ENSP00000368190.4
NPHS1	ENST00000353632.6	c.313G>A	p.Asp105Asn	missense_variant	3/28	5		ENSP00000343634.5

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152164 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461374 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 726994

Gnomad4 AFR exome AF: 0.0000299

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: 0.00

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152164 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74338

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000756

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:6 Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Finnish congenital nephrotic syndrome Pathogenic:5

Likely pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Nov 02, 2018	Variant summary: NPHS1 c.313G>A (p.Asp105Asn) results in a conservative amino acid change located in the Immunoglobulin-like domain of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 3.6e-06 in 275106 control chromosomes (gnomAD and publications). The variant, c.313G>A, has been reported in the literature in individuals affected with Nephrotic Syndrome, Type 1 (Sadowski_2014, Sako_2005, Sen_2017). These data indicate that the variant is likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and classified the variant as likely pathogenic. Based on the evidence outlined above, the variant was classified as likely pathogenic. -
Likely pathogenic, no assertion criteria provided	literature only	Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM)	-	- -
Likely pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Nov 04, 2020	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Aug 22, 2017	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Apr 05, 2024	- -

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 17, 2023

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 105 of the NPHS1 protein (p.Asp105Asn). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This missense change has been observed in individuals with nephrotic syndrome (PMID: 25349199, 28204945; Invitae). ClinVar contains an entry for this variant (Variation ID: 56493). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt NPHS1 protein function. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Kidney disorder Uncertain:1

Uncertain significance, flagged submission

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Dec 12, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.77
BayesDel_addAF	Uncertain	0.10	D
BayesDel_noAF	Benign	-0.090
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.71	D;.
Eigen	Pathogenic	0.78
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.86	D;D
M_CAP	Pathogenic	0.60	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	0.90	D
MutationAssessor	Pathogenic	4.3	H;H
PrimateAI	Uncertain	0.68	T
PROVEAN	Uncertain	-4.2	D;D
REVEL	Uncertain	0.61
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.78
MutPred		0.93		Loss of disorder (P = 0.09);Loss of disorder (P = 0.09);
MVP		0.91
MPC		0.69
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.88
gMVP		0.93

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: rs386833932; hg19: chr19-36342248; COSMIC: COSV62289414; COSMIC: COSV62289414;