19-35851298-C-T

Variant names:

• chr19-35851298-C-T
• rs1403580615
• NM_004646.4:c.361G>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_004646.4(NPHS1):​c.361G>A​(p.Glu121Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,752 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E121D) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: NPHS1 NM_004646.4 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 1.86
• Publications: 1 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]

KIRREL2 (HGNC:18816): (kirre like nephrin family adhesion molecule 2) This gene encodes a type I transmembrane protein and member of the immunoglobulin superfamily of cell adhesion molecules. The encoded protein localizes to adherens junctions in pancreatic beta cells and regulates insulin secretion. Autoantibodies against the encoded protein have been detected in serum from patients with type 1 diabetes. This gene may also play a role in glomerular development and decreased expression of this gene has been observed in human glomerular diseases. This gene and the related opposite-strand gene nephrin (GeneID: 527362) are regulated by a bidirectional promoter. [provided by RefSeq, Jul 2016]

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 4 uncertain in NM_004646.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.41193643).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004646.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPHS1	NM_004646.4	MANE Select	c.361G>A	p.Glu121Lys	missense	Exon 3 of 29	NP_004637.1	O60500-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPHS1	ENST00000378910.10	TSL:1 MANE Select	c.361G>A	p.Glu121Lys	missense	Exon 3 of 29	ENSP00000368190.4	O60500-1
	NPHS1	ENST00000869106.1		c.361G>A	p.Glu121Lys	missense	Exon 3 of 29	ENSP00000539165.1
	NPHS1	ENST00000353632.6	TSL:5	c.361G>A	p.Glu121Lys	missense	Exon 3 of 28	ENSP00000343634.5	O60500-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461752 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727174

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53372

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000450 AC: 5 AN: 1111940

Other (OTH) AF: 0.00 AC: 0 AN: 60384

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	Finnish congenital nephrotic syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	19
DANN	Benign	0.96
DEOGEN2	Benign	0.21	T
Eigen	Benign	-0.40
Eigen_PC	Benign	-0.42
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.41	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.84	L
PhyloP100		1.9
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-0.36	N
REVEL	Benign	0.18
Sift	Benign	0.40	T
Sift4G	Benign	0.11	T
Polyphen		0.62	P
Vest4		0.52
MutPred		0.41		Gain of ubiquitination at E121 (P = 0.0177)
MVP		0.64
MPC		0.37
ClinPred		0.32	T
GERP RS		3.8
Varity_R		0.11
gMVP		0.62
Mutation Taster		=65/35	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs1403580615; hg19: chr19-36342200;