rs398124483

Positions:

chr6-52079936-AC-A

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_138694.4(PKHD1):c.353delG(p.Ser118fs) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000559 in 1,610,524 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000058 ( 0 hom. )

Consequence

PKHD1
NM_138694.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:19

Conservation

PhyloP100: 0.407

Variant links:

Genes affected

PKHD1 (HGNC:9016): (PKHD1 ciliary IPT domain containing fibrocystin/polyductin) The protein encoded by this gene is predicted to have a single transmembrane (TM)-spanning domain and multiple copies of an immunoglobulin-like plexin-transcription-factor domain. Alternative splicing results in two transcript variants encoding different isoforms. Other alternatively spliced transcripts have been described, but the full length sequences have not been determined. Several of these transcripts are predicted to encode truncated products which lack the TM and may be secreted. Mutations in this gene cause autosomal recessive polycystic kidney disease, also known as polycystic kidney and hepatic disease-1. [provided by RefSeq, Jul 2008]

PKHD1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 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 6-52079936-AC-A is Pathogenic according to our data. Variant chr6-52079936-AC-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 96397.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-52079936-AC-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PKHD1	NM_138694.4 link	c.353delG	p.Ser118fs	frameshift_variant	5/67	ENST00000371117.8	NP_619639.3	P08F94-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PKHD1	ENST00000371117.8 link	c.353delG	p.Ser118fs	frameshift_variant	5/67	1	NM_138694.4	ENSP00000360158.3		P08F94-1
PKHD1	ENST00000340994.4 link	c.353delG	p.Ser118fs	frameshift_variant	5/61	5		ENSP00000341097.4		P08F94-2

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152094

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000557

AC:

AN:

251440

Hom.:

AF XY:

0.0000810

AC XY:

AN XY:

135884

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000114

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000583

AC:

AN:

1458430

Hom.:

Cov.:

AF XY:

0.0000592

AC XY:

AN XY:

725790

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000721

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152094

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74308

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000588

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.0000416

EpiCase

AF:

0.000164

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:19

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive polycystic kidney disease

Pathogenic:10

Pathogenic, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Aug 31, 2017	- -
Pathogenic, criteria provided, single submitter	clinical testing	Genomic Medicine Lab, University of California San Francisco	Nov 29, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 21, 2023	This sequence change creates a premature translational stop signal (p.Ser118Ilefs*35) in the PKHD1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in PKHD1 are known to be pathogenic (PMID: 19940839). This variant is present in population databases (rs398124483, gnomAD 0.01%). This premature translational stop signal has been observed in individuals with autosomal recessive polycystic kidney disease (PMID: 15108281, 15805161, 16133180). ClinVar contains an entry for this variant (Variation ID: 96397). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	-	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Sep 28, 2016	The PKHD1 c.353delG (p.Ser118IlefsTer35) variant results in a frameshift and is predicted to cause a premature termination of the protein. This variant has been reported in three studies and is found in a total of four individuals with autosomal recessive polycystic kidney disease, including three compound heterozygotes and one heterozygote in whom a second variant could not be identified (Bergmann et al. 2004. Sharp et al. 2005, Losekoot et al. 2005). The p.Ser118IlefsTer35 variant was absent from 300 controls but is reported at a frequency of 0.00013 in the European (non-Finnish) population of the Exome Aggregation Consortium. Based on the evidence and the potential impact of frameshift variants, the p.Ser118IlefsTer35 variant is classified as likely pathogenic for autosomal recessive polycystic kidney disease. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -
Pathogenic, criteria provided, single submitter	clinical testing	Victorian Clinical Genetics Services, Murdoch Childrens Research Institute	Jun 11, 2020	Based on the classification scheme VCGS_Germline_v1.1.1, this variant is classified as Pathogenic. Following criteria are met: 0102 - Loss-of-function is a known mechanism of disease for this gene. (N) 0106 - This gene is known to be associated with autosomal recessive disease. (N) 0201 - Variant is predicted to cause nonsense-mediated decay (NMD) and loss of protein (exon 5 of 67). (P) 0251 - Variant is heterozygous. (N) 0304 - Variant is present in gnomAD (v2) <0.01 for a recessive condition (14 heterozygotes, 0 homozygotes). (P) 0701 - Comparable variants have very strong previous evidence for pathogenicity. Many other NMD-predicted variants have previously been reported as pathogenic in patients with ARPKD (ClinVar). (P) 0801 - Strong previous evidence of pathogenicity in unrelated individuals. The variant has previously been reported in multiple cases of ARPKD (ClinVar, HGMD, PMID: 15108281, PMID: 15805161, PMID: 16133180, PMID: 30650191). (P) 0905 - No segregation evidence has been identified for this variant. (N) 1007 - No published functional evidence has been identified for this variant. (N) 1208 - Inheritance information for this variant is not currently available. (N) Legend: (P) - Pathogenic, (N) - Neutral, (B) - Benign -
Pathogenic, criteria provided, single submitter	research	Molecular Biology Laboratory, Fundació Puigvert	Feb 01, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Mar 17, 2017	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Jan 02, 2014	- -

not provided

Pathogenic:4

Pathogenic, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Oct 10, 2012	- -
Pathogenic, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Nov 25, 2019	PVS1, PM2, PM3 -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Jan 02, 2024	Reported with a second variant (phase unknown) in unrelated patients with polycystic kidney disease (PMID: 16133180, 15805161, 30650191); Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 31589614, 30650191, 15108281, 15805161, 33532864, 16133180, 19940839) -

Polycystic kidney disease 4

Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Feb 28, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Feb 28, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Feb 16, 2023	- -

Autosomal dominant polycystic liver disease

Pathogenic:1

Pathogenic, no assertion criteria provided

research

Laboratory of Gastroenterology and Hepatology, Radboud University Medical Center

Sep 01, 2021

- -

PKHD1-related disorder

Pathogenic:1

Pathogenic, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 03, 2024

The PKHD1 c.353delG variant is predicted to result in a frameshift and premature protein termination (p.Ser118Ilefs*35). This variant has been reported to be pathogenic for autosomal recessive polycystic kidney disease (ARPKD) (Bergmann et al. 2004, PubMed ID: 1510828; Table S2, P129, Domingo-Gallego A et al 2022. PubMed ID: 33532864). This variant is reported in 0.011% of alleles in individuals of European (Non-Finnish) descent in gnomAD. Frameshift variants in PKHD1 are expected to be pathogenic. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.15

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over