rs375907280

Variant names:

• chr2-110148020-G-A
• rs375907280
• NM_001128178.3:c.1165C>T

Your query was ambiguous. Multiple possible variants found:

• chr2-110148020-G-A
• chr2-110148020-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001128178.3(NPHP1):​c.1165C>T​(p.Arg389Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000067 in 1,582,468 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000071 (0 hom.)
• Consequence: NPHP1 NM_001128178.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:7
• Conservation: PhyloP100: 4.43

Genes affected

NPHP1 (HGNC:7905): (nephrocystin 1) This gene encodes a protein with src homology domain 3 (SH3) patterns. This protein interacts with Crk-associated substrate, and it appears to function in the control of cell division, as well as in cell-cell and cell-matrix adhesion signaling, likely as part of a multifunctional complex localized in actin- and microtubule-based structures. Mutations in this gene cause familial juvenile nephronophthisis type 1, a kidney disorder involving both tubules and glomeruli. Defects in this gene are also associated with Senior-Loken syndrome type 1, also referred to as juvenile nephronophthisis with Leber amaurosis, which is characterized by kidney and eye disease, and with Joubert syndrome type 4, which is characterized by cerebellar ataxia, oculomotor apraxia, psychomotor delay and neonatal breathing abnormalities, sometimes including retinal dystrophy and renal disease. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2471849).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NPHP1	NM_001128178.3	c.1165C>T	p.Arg389Cys	missense_variant	Exon 13 of 20	ENST00000445609.7	NP_001121650.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NPHP1	ENST00000445609.7	c.1165C>T	p.Arg389Cys	missense_variant	Exon 13 of 20	1	NM_001128178.3	ENSP00000389879.3

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152082 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

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: 0.0000441

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000598 AC: 15 AN: 250970 Hom.: 0 AF XY: 0.0000663 AC XY: 9 AN XY: 135790

Gnomad AFR exome AF: 0.000125

Gnomad AMR exome AF: 0.0000579

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000196

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000352

Gnomad OTH exome AF: 0.000164

GnomAD4 exome AF: 0.0000713 AC: 102 AN: 1430386 Hom.: 0 Cov.: 26 AF XY: 0.0000743 AC XY: 53 AN XY: 713680

Gnomad4 AFR exome AF: 0.0000913

Gnomad4 AMR exome AF: 0.0000447

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000253

Gnomad4 SAS exome AF: 0.000140

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000757

Gnomad4 OTH exome AF: 0.0000337

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152082 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74270

Gnomad4 AFR AF: 0.0000241

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: 0.0000441

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000450 Hom.: 0

Bravo AF: 0.0000756

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.000349 AC: 3

ExAC AF: 0.0000741 AC: 9

EpiCase AF: 0.000109

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:2

Jul 02, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Reported in a patient with neurological symptoms of an NPHP1-related disease in published literature (PMID: 37296294); In silico analysis indicates that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 37296294) -

Oct 06, 2017

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Senior-Loken syndrome 1 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. -

Nephronophthisis 1 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. -

Nephronophthisis Uncertain:1

Oct 13, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 445 of the NPHP1 protein (p.Arg445Cys). This variant is present in population databases (rs375907280, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with NPHP1-related conditions. ClinVar contains an entry for this variant (Variation ID: 330732). 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 not expected to disrupt NPHP1 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Joubert syndrome with renal defect 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. -

Joubert syndrome with renal defect;C1855681:Nephronophthisis 1;C4551559:Senior-Loken syndrome 1 Uncertain:1

Feb 23, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.30
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.21	.;.;T;.;T
Eigen	Benign	0.057
Eigen_PC	Benign	0.15
FATHMM_MKL	Benign	0.72	D
LIST_S2	Uncertain	0.97	D;D;D;D;D
M_CAP	Uncertain	0.094	D
MetaRNN	Benign	0.25	T;T;T;T;T
MetaSVM	Benign	-0.77	T
MutationAssessor	Benign	0.0	.;.;N;.;.
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-1.9	N;N;N;N;N
REVEL	Uncertain	0.31
Sift	Uncertain	0.021	D;D;D;D;D
Sift4G	Uncertain	0.0060	D;D;D;D;D
Polyphen		0.99	D;D;D;D;D
Vest4		0.18
MVP		0.85
MPC		0.36
ClinPred		0.54	D
GERP RS		4.8
Varity_R		0.18
gMVP		0.56

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		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: rs375907280; hg19: chr2-110905597;