19-35825985-G-A

Variant names:

• chr19-35825985-G-A
• rs148755697
• NM_004646.4:c.*529C>T

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BS1_Supporting BS2

The NM_004646.4(NPHS1):​c.*529C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0231 in 152,194 control chromosomes in the GnomAD database, including 54 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.023 (54 hom., cov: 32)
  • Exomes 𝑓: 0.021 (0 hom.)
• Consequence: NPHS1 NM_004646.4 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -2.56
• Publications: 2 publications found

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 Gene-Disease associations (from GenCC):

• congenital nephrotic syndrome, Finnish type

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Myriad Women’s Health, G2P, Labcorp Genetics (formerly Invitae), ClinGen
• familial idiopathic steroid-resistant nephrotic syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.02).
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0231 (3508/151718) while in subpopulation NFE AF = 0.0373 (2535/67924). AF 95% confidence interval is 0.0361. There are 54 homozygotes in GnomAd4. There are 1635 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High Homozygotes in GnomAd4 at 54 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NPHS1	NM_004646.4	c.*529C>T		3_prime_UTR_variant	Exon 29 of 29	ENST00000378910.10	NP_004637.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NPHS1	ENST00000378910.10	c.*529C>T		3_prime_UTR_variant	Exon 29 of 29	1	NM_004646.4	ENSP00000368190.4

Frequencies

GnomAD3 genomes AF: 0.0231 AC: 3508 AN: 151600 Hom.: 54 Cov.: 32

Gnomad AFR AF: 0.00664

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0154

Gnomad ASJ AF: 0.0265

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00499

Gnomad FIN AF: 0.0308

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0373

Gnomad OTH AF: 0.0125

GnomAD4 exome AF: 0.0210 AC: 10 AN: 476 Hom.: 0 Cov.: 0 AF XY: 0.0221 AC XY: 6 AN XY: 272

African (AFR) AF: 0.00 AC: 0 AN: 4

American (AMR) AF: 0.0288 AC: 3 AN: 104

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 4

East Asian (EAS) AF: 0.00 AC: 0 AN: 20

South Asian (SAS) AF: 0.0263 AC: 1 AN: 38

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 2

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.0205 AC: 6 AN: 292

Other (OTH) AF: 0.00 AC: 0 AN: 12

GnomAD4 genome AF: 0.0231 AC: 3508 AN: 151718 Hom.: 54 Cov.: 32 AF XY: 0.0221 AC XY: 1635 AN XY: 74144

African (AFR) AF: 0.00662 AC: 274 AN: 41360

American (AMR) AF: 0.0153 AC: 233 AN: 15196

Ashkenazi Jewish (ASJ) AF: 0.0265 AC: 92 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5138

South Asian (SAS) AF: 0.00499 AC: 24 AN: 4806

European-Finnish (FIN) AF: 0.0308 AC: 324 AN: 10522

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0373 AC: 2535 AN: 67924

Other (OTH) AF: 0.0123 AC: 26 AN: 2106

Alfa AF: 0.0106 Hom.: 1

Bravo AF: 0.0214

Asia WGS AF: 0.00260 AC: 9 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Congenital nephrotic syndrome Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	1.1
DANN	Benign	0.69
PhyloP100		-2.6
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs148755697; hg19: chr19-36316887;