rs137852923

Variant names:

• chr1-5904788-G-A
• rs137852923
• NM_015102.5:c.1972C>T

Your query was ambiguous. Multiple possible variants found:

• chr1-5904788-G-A
• chr1-5904788-G-C

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_015102.5(NPHP4):​c.1972C>T​(p.Arg658*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000205 in 1,461,682 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. R658R) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: NPHP4 NM_015102.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:3 O:1
• Conservation: PhyloP100: 0.0520
• Publications: 7 publications found

Genes affected

NPHP4 (HGNC:19104): (nephrocystin 4) This gene encodes a protein involved in renal tubular development and function. This protein interacts with nephrocystin, and belongs to a multifunctional complex that is localized to actin- and microtubule-based structures. Mutations in this gene are associated with nephronophthisis type 4, a renal disease, and with Senior-Loken syndrome type 4, a combination of nephronophthisis and retinitis pigmentosa. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2014]

NPHP4 Gene-Disease associations (from GenCC):

• nephronophthisis 4

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), G2P
• Senior-Loken syndrome 4

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• nephronophthisis 1

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Senior-Loken syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-5904788-G-A is Pathogenic according to our data. Variant chr1-5904788-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 3405.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015102.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPHP4	NM_015102.5	MANE Select	c.1972C>T	p.Arg658*	stop_gained	Exon 16 of 30	NP_055917.1
	NPHP4	NM_001291594.2		c.436C>T	p.Arg146*	stop_gained	Exon 12 of 26	NP_001278523.1
	NPHP4	NM_001291593.2		c.433C>T	p.Arg145*	stop_gained	Exon 13 of 27	NP_001278522.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPHP4	ENST00000378156.9	TSL:1 MANE Select	c.1972C>T	p.Arg658*	stop_gained	Exon 16 of 30	ENSP00000367398.4
	NPHP4	ENST00000378169.7	TSL:1	n.*873C>T		non_coding_transcript_exon	Exon 13 of 27	ENSP00000367411.3
	NPHP4	ENST00000466897.1	TSL:1	n.49C>T		non_coding_transcript_exon	Exon 2 of 6	ENSP00000425745.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000802 AC: 2 AN: 249268 AF XY: 0.00000739

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000885

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000205 AC: 30 AN: 1461682 Hom.: 0 Cov.: 31 AF XY: 0.0000206 AC XY: 15 AN XY: 727122

African (AFR) AF: 0.0000896 AC: 3 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

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

East Asian (EAS) AF: 0.000126 AC: 5 AN: 39700

South Asian (SAS) AF: 0.0000348 AC: 3 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

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

European-Non Finnish (NFE) AF: 0.0000162 AC: 18 AN: 1111852

Other (OTH) AF: 0.0000166 AC: 1 AN: 60374

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000826 AC: 1

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Nephronophthisis Pathogenic:1 Other:1

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

Aug 25, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Arg658*) in the NPHP4 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in NPHP4 are known to be pathogenic (PMID: 12205563, 23559409). This variant is present in population databases (rs137852923, ExAC 0.006%). This premature translational stop signal has been observed in individual(s) with nephronophthisis (PMID: 12205563). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 3405). For these reasons, this variant has been classified as Pathogenic.

Senior-Loken syndrome 4 Pathogenic:1

Nov 01, 2002

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Nephronophthisis 4 Pathogenic:1

Aug 16, 2018

Bioscientia Institut fuer Medizinische Diagnostik GmbH, Sonic Healthcare

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.28
CADD	Pathogenic	36
DANN	Uncertain	1.0
Eigen	Uncertain	0.21
Eigen_PC	Benign	-0.093
FATHMM_MKL	Benign	0.087	N
PhyloP100		0.052
Vest4		0.44
GERP RS		2.0
Mutation Taster		=2/198	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		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: rs137852923; hg19: chr1-5964848;