chr19-35848758-G-A

Position:

chr19-35848758-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PM5

The NM_004646.4(NPHS1):c.1049C>T(p.Ser350Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000149 in 1,614,178 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S350P) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

NPHS1
NM_004646.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:4

Conservation

PhyloP100: 1.06

Variant links:

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]

NPHS1 links:

NPHS1 (HGNC:):

NPHS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM1

In a domain Ig-like C2-type 4 (size 94) in uniprot entity NPHN_HUMAN there are 15 pathogenic changes around while only 1 benign (94%) 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 chr19-35848759-A-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NPHS1	NM_004646.4 linkuse as main transcript	c.1049C>T	p.Ser350Phe	missense_variant	9/29	ENST00000378910.10	NP_004637.1	O60500-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
NPHS1	ENST00000378910.10 linkuse as main transcript	c.1049C>T	p.Ser350Phe	missense_variant	9/29	1	NM_004646.4	ENSP00000368190.4	O60500-1
NPHS1	ENST00000353632.6 linkuse as main transcript	c.1049C>T	p.Ser350Phe	missense_variant	9/28	5		ENSP00000343634.5	O60500-2
NPHS1	ENST00000592132.1 linkuse as main transcript	n.56C>T		non_coding_transcript_exon_variant	2/4	3

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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

GnomAD3 exomes

AF:

0.0000278

AC:

AN:

251430

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135912

show subpopulations

Gnomad AFR exome

AF:

0.000308

Gnomad AMR exome

AF:

0.0000578

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461886

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.000299

Gnomad4 AMR exome

AF:

0.0000224

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.000241

Gnomad4 AMR

AF:

0.000131

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:

0.000140

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Finnish congenital nephrotic syndrome

Pathogenic:1Uncertain:3

Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	May 14, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Jan 25, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Jul 15, 2019	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -
Likely pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Mar 08, 2024	- -

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 29, 2024

This sequence change replaces serine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 350 of the NPHS1 protein (p.Ser350Phe). This variant is present in population databases (rs570069789, gnomAD 0.03%). This missense change has been observed in individual(s) with NPHS1-related conditions (PMID: 27325253). ClinVar contains an entry for this variant (Variation ID: 550375). 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 80%. This variant disrupts the p.Ser350 amino acid residue in NPHS1. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 9915943, 20172850, 20507940, 27594755). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. 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. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

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

Aug 20, 2021

Variant summary: NPHS1 c.1049C>T (p.Ser350Phe) results in a non-conservative amino acid change located in the Immunoglobulin subtype domain of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 2.8e-05 in 251430 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.1049C>T has been reported in the literature in an individual affected with refractory lupus nephritis who carried the variant in the homozygous state (Romaganani_2016). Renal progenitor cells from this patient were differentiated into podocytes which were tested in vitro to show aberrant nephrin trafficking, cytoskeletal structure and lysosomal leakage, and increased detachment as compared with podocytes isolated from controls. However, the clinical impact of these functional changes is unclear. The clinical and functional reports do not provide unequivocal conclusions about association of the variant with Nephrotic Syndrome, Type 1. A different amino acid change at the same location has been reported in association with Nephrotic Syndrome, Type 1 (Ser350Pro), suggesting a potential functional role in the amino acid. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.17

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.71

D;.

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Benign

0.51

LIST_S2

Benign

0.81

T;T

M_CAP

Uncertain

0.22

MetaRNN

Uncertain

0.70

D;D

MetaSVM

Uncertain

-0.095

MutationAssessor

Benign

1.8

L;L

PrimateAI

Uncertain

0.50

PROVEAN

Uncertain

-3.8

D;D

REVEL

Uncertain

0.48

Sift

Uncertain

0.0090

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

0.98

D;.

Vest4

0.70

MutPred

0.63

Loss of disorder (P = 0.0077);Loss of disorder (P = 0.0077);

MVP

0.93

MPC

0.66

ClinPred

0.27

GERP RS

4.3

Varity_R

0.57

gMVP

0.72

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.61

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.61

Position offset: -5

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