rs386833908

Variant names:

• chr19-35843581-A-G
• rs386833908
• NM_004646.4:c.2225T>C

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM2 PP5

The NM_004646.4(NPHS1):​c.2225T>C​(p.Ile742Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. I742I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NPHS1 NM_004646.4 missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 6.30
• Publications: 4 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: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 9 uncertain in NM_004646.4
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 19-35843581-A-G is Pathogenic according to our data. Variant chr19-35843581-A-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 56468.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NPHS1	NM_004646.4	c.2225T>C	p.Ile742Thr	missense_variant	Exon 17 of 29	ENST00000378910.10	NP_004637.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NPHS1	ENST00000378910.10	c.2225T>C	p.Ile742Thr	missense_variant	Exon 17 of 29	1	NM_004646.4	ENSP00000368190.4
NPHS1	ENST00000585400.1	n.916T>C		non_coding_transcript_exon_variant	Exon 3 of 3	1
NPHS1	ENST00000353632.6	c.2225T>C	p.Ile742Thr	missense_variant	Exon 17 of 28	5		ENSP00000343634.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Finnish congenital nephrotic syndrome Pathogenic:1

-

Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM)

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.50	T;.
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.66
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.81	T;T
M_CAP	Benign	0.070	D
MetaRNN	Uncertain	0.69	D;D
MetaSVM	Benign	-0.93	T
MutationAssessor	Pathogenic	3.1	M;M
PhyloP100		6.3
PrimateAI	Uncertain	0.61	T
PROVEAN	Uncertain	-4.3	D;D
REVEL	Uncertain	0.38
Sift	Uncertain	0.0020	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.52
MutPred		0.73		Gain of disorder (P = 0.0173);Gain of disorder (P = 0.0173);
MVP		0.84
MPC		2.1
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.90
gMVP		0.93
Mutation Taster		=5/95	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs386833908; hg19: chr19-36334483;