rs148617572

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2PP3_ModeratePP5_Very_Strong

The NM_138694.4(PKHD1):c.10444C>T(p.Arg3482Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000235 in 1,613,826 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 Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R3482H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

PKHD1
NM_138694.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:10

Conservation

PhyloP100: 2.60

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:

LOC124900615 (HGNC:):

LOC124900615 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.936

PP5

Variant 6-51659682-G-A is Pathogenic according to our data. Variant chr6-51659682-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 188896.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-51659682-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PKHD1	NM_138694.4 linkuse as main transcript	c.10444C>T	p.Arg3482Cys	missense_variant	61/67	ENST00000371117.8
LOC124900615	XR_926871.3 linkuse as main transcript	n.155+7309G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PKHD1	ENST00000371117.8 linkuse as main transcript	c.10444C>T	p.Arg3482Cys	missense_variant	61/67	1	NM_138694.4	P2	P08F94-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152116

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:

0.000193

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:

0.0000519

AC:

AN:

250682

Hom.:

AF XY:

0.0000517

AC XY:

AN XY:

135478

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000229

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000233

AC:

AN:

1461592

Hom.:

Cov.:

AF XY:

0.0000275

AC XY:

AN XY:

727112

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000448

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000104

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000189

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152234

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000194

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000278

Hom.:

Bravo

AF:

0.0000227

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000577

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive polycystic kidney disease

Pathogenic:4

Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Jan 27, 2024	This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 3482 of the PKHD1 protein (p.Arg3482Cys). This variant is present in population databases (rs148617572, gnomAD 0.02%). This missense change has been observed in individual(s) with autosomal recessive polycystic kidney disease and related conditions (PMID: 12506140, 15108281, 15805161, 26385851, 26721323). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 188896). 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 expected to disrupt PKHD1 protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. -
Likely pathogenic, criteria provided, single submitter	clinical testing	Equipe Genetique des Anomalies du Developpement, Université de Bourgogne	Jan 01, 2014	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	-	- -
Likely pathogenic, criteria provided, single submitter	literature only	Counsyl	Jul 23, 2014	- -

Polycystic kidney disease 4

Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein	Jul 22, 2022	ACMG classification criteria: PS4 strong, PM2 moderated, PM3 moderated, PP1 supporting -
Pathogenic, criteria provided, single submitter	clinical testing	Neuberg Centre For Genomic Medicine, NCGM	-	The missense c.10444C>Tp.Arg3482Cys variant in PKHD1 gene has been reported previously in homozygous or compound heterozygous state in individuals affected with Autosomal recessive polycystic kidney disease ARPKD Quint A et al., 2016. This variant is reported with the allele frequency of 0.006% in the gnomAD Exomes and novel in 1000 Genomes. This variant has been reported to the ClinVar database as Likely Pathogenic / Pathogenic multiple submitters. The amino acid Arg at position 3482 is changed to a Cys changing protein sequence and it might alter its composition and physico-chemical properties. The amino acid change p.Arg3482Cys in PKHD1 is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. 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 indicates that this missense variant is expected to disrupt PKHD1 protein function. The variant is predicted as damaging by SIFT. For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Nov 07, 2019	This variant was determined to be pathogenic according to ACMG Guidelines, 2015 [PMID:25741868]. -

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Aug 05, 2016	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Sep 21, 2023	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 26721323, 12506140, 15108277, 15698423, 19914852, 26385851, 25114813, 15805161, 19940839, 34426522, 33940108, 15108281, 30275481, 37013475, 35812281, Corradi2022[abstract], 36964991) -

PKHD1-related disorder

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 17, 2023

The PKHD1 c.10444C>T variant is predicted to result in the amino acid substitution p.Arg3482Cys. This variant has been repeatedly reported to be pathogenic for autosomal recessive polycystic kidney disease (ARPKD) (see for example, Bergmann et al. 2003. PubMed ID: 12506140; Thakur et al. 2014. PubMed ID: 25114813; Quint et al. 2015. PubMed ID: 26721323). This variant is reported in 0.023% of alleles in individuals of South Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/6-51524480-G-A). This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Uncertain

0.090

BayesDel_noAF

Pathogenic

0.18

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Pathogenic

0.80

Eigen

Uncertain

0.25

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Benign

0.73

LIST_S2

Benign

0.85

M_CAP

Uncertain

0.13

MetaRNN

Pathogenic

0.94

MetaSVM

Uncertain

0.17

MutationAssessor

Benign

2.0

MutationTaster

Benign

0.95

PrimateAI

Benign

0.22

PROVEAN

Pathogenic

-5.7

REVEL

Uncertain

0.61

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.83

MVP

0.99

MPC

0.39

ClinPred

0.73

GERP RS

3.9

Varity_R

0.36

gMVP

0.85

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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