rs386833864

Positions:

• chr19-35848711-T-G

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1 PM2 PM5 PP3_Strong PP5_Very_Strong

The NM_004646.4(NPHS1):​c.1096A>C​(p.Ser366Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,878 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 Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S366N) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: NPHS1 NM_004646.4 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:7
• Conservation: PhyloP100: 2.89

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 18 ACMG points.

• PM1: In a disulfide_bond (size 56) in uniprot entity NPHN_HUMAN there are 22 pathogenic changes around while only 6 benign (79%) in NM_004646.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-35848710-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1066570.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.972
• PP5: Variant 19-35848711-T-G is Pathogenic according to our data. Variant chr19-35848711-T-G is described in ClinVar as [Pathogenic]. Clinvar id is 56420.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr19-35848711-T-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NPHS1	NM_004646.4	c.1096A>C	p.Ser366Arg	missense_variant	9/29	ENST00000378910.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NPHS1	ENST00000378910.10	c.1096A>C	p.Ser366Arg	missense_variant	9/29	1	NM_004646.4	P2
NPHS1	ENST00000353632.6	c.1096A>C	p.Ser366Arg	missense_variant	9/28	5		A2
NPHS1	ENST00000592132.1	n.103A>C		non_coding_transcript_exon_variant	2/4	3

Frequencies

GnomAD3 genomes AF: 0.00 AC: 1 AN: 152156 Hom.: 0 Cov.: 32 FAILED QC

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: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251380 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135892

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: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461878 Hom.: 0 Cov.: 32 AF XY: 0.00000550 AC XY: 4 AN XY: 727238

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: 0.0000497

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000657 AC: 1 AN: 152156 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74314

Gnomad4 AFR AF: 0.00

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: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000468 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Finnish congenital nephrotic syndrome Pathogenic:6

Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	May 21, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 28, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Feb 11, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	Centre for Mendelian Genomics, University Medical Centre Ljubljana	Mar 26, 2020	This variant was classified as: Pathogenic. The following ACMG criteria were applied in classifying this variant: PS3,PS4_MOD,PM2,PP2,PP3,PP4. -
Likely pathogenic, no assertion criteria provided	literature only	Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM)	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Mar 27, 2023	Variant summary: NPHS1 c.1096A>C (p.Ser366Arg) results in a non-conservative amino acid change located in the Immunoglobulin subtype domain (IPR003599) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 251380 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.1096A>C has been reported in the literature in multiple individuals affected with Nephrotic Syndrome, Type 1 (e.g., Lenkkeri_1999, Machuca_2010). These data indicate that the variant is very likely to be associated with disease. Several publications report experimental evidence evaluating an impact on protein function, finding that the variant disrupts protein localization and folding leading to retention and eventual degradation in the endoplasmic reticulum (e.g., Liu_2001, Drozova_2013, Yoshida_2021). Four ClinVar submitters (evaluation after 2014) have cited the variant, and all laboratories classified the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Dec 15, 2023

This sequence change replaces serine, which is neutral and polar, with arginine, which is basic and polar, at codon 366 of the NPHS1 protein (p.Ser366Arg). This variant is present in population databases (rs386833864, gnomAD 0.0009%). This missense change has been observed in individuals with NPHS1-related conditions (PMID: 9915943, 18709391, 20172850, 24371179, 24397250). ClinVar contains an entry for this variant (Variation ID: 56420). 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 with a positive predictive value of 95%. Experimental studies have shown that this missense change affects NPHS1 function (PMID: 11726550, 18614772, 24303155). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.24
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.85	D;.
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.78	T;T
M_CAP	Pathogenic	0.60	D
MetaRNN	Pathogenic	0.97	D;D
MetaSVM	Uncertain	0.39	D
MutationAssessor	Pathogenic	3.0	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.56	T
PROVEAN	Pathogenic	-5.0	D;D
REVEL	Pathogenic	0.83
Sift	Uncertain	0.0020	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.74
MutPred		0.83		Loss of phosphorylation at S366 (P = 0.0352);Loss of phosphorylation at S366 (P = 0.0352);
MVP		0.89
MPC		0.74
ClinPred		0.99	D
GERP RS		5.4
Varity_R		0.96
gMVP		0.96

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: rs386833864; hg19: chr19-36339613;