6-51632721-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_138694.4(PKHD1):c.11509G>A(p.Val3837Ile) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00856 in 1,612,518 control chromosomes in the GnomAD database, including 1,046 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. V3837V) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.046 ( 561 hom., cov: 32)

Exomes 𝑓: 0.0047 ( 485 hom. )

Consequence

PKHD1
NM_138694.4 missense, splice_region

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 0.671

Publications

12 publications found

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 Gene-Disease associations (from GenCC):

autosomal recessive polycystic kidney disease
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Myriad Women’s Health, Orphanet
polycystic kidney disease 4
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Laboratory for Molecular Medicine, Genomics England PanelApp
Caroli disease
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

PKHD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0017229617).

BP6

Variant 6-51632721-C-T is Benign according to our data. Variant chr6-51632721-C-T is described in ClinVar as Benign. ClinVar VariationId is 96370.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.155 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PKHD1	NM_138694.4 link	c.11509G>A	p.Val3837Ile	missense_variant, splice_region_variant	Exon 65 of 67	ENST00000371117.8	NP_619639.3	P08F94-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PKHD1	ENST00000371117.8 link	c.11509G>A	p.Val3837Ile	missense_variant, splice_region_variant	Exon 65 of 67	1	NM_138694.4	ENSP00000360158.3		P08F94-1

Frequencies

GnomAD3 genomes

AF:

0.0456

AC:

6920

AN:

151908

Hom.:

560

Cov.:

show subpopulations

Gnomad AFR

AF:

0.159

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0169

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000829

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000618

Gnomad OTH

AF:

0.0320

GnomAD2 exomes

AF:

0.0118

AC:

2952

AN:

250810

AF XY:

0.00859

show subpopulations

Gnomad AFR exome

AF:

0.159

Gnomad AMR exome

AF:

0.00754

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000512

Gnomad OTH exome

AF:

0.00556

GnomAD4 exome

AF:

0.00471

AC:

6872

AN:

1460492

Hom.:

485

Cov.:

AF XY:

0.00412

AC XY:

2990

AN XY:

726606

show subpopulations

African (AFR)

AF:

0.163

AC:

5426

AN:

33390

American (AMR)

AF:

0.00949

AC:

424

AN:

44660

Ashkenazi Jewish (ASJ)

AF:

0.0000766

AC:

AN:

26102

East Asian (EAS)

AF:

0.00

AC:

AN:

39670

South Asian (SAS)

AF:

0.000557

AC:

AN:

86216

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53390

Middle Eastern (MID)

AF:

0.00834

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

0.000286

AC:

318

AN:

1110990

Other (OTH)

AF:

0.0100

AC:

606

AN:

60318

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

259

518

776

1035

1294

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

172

344

516

688

860

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0456

AC:

6936

AN:

152026

Hom.:

561

Cov.:

AF XY:

0.0451

AC XY:

3354

AN XY:

74288

show subpopulations

African (AFR)

AF:

0.158

AC:

6564

AN:

41434

American (AMR)

AF:

0.0169

AC:

257

AN:

15244

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000622

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10568

Middle Eastern (MID)

AF:

0.0102

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000618

AC:

AN:

67996

Other (OTH)

AF:

0.0317

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

299

598

896

1195

1494

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

132

198

264

330

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0168

Hom.:

511

Bravo

AF:

0.0523

ESP6500AA

AF:

0.153

AC:

672

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.0149

AC:

1813

Asia WGS

AF:

0.00953

AC:

AN:

3476

EpiCase

AF:

0.000492

EpiControl

AF:

0.000830

ClinVar

Significance: Benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive polycystic kidney disease

Benign:3

May 11, 2017

Natera, Inc.

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not specified

Benign:2

Jul 17, 2012

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Polycystic kidney disease

Benign:1

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

The PKHD1 p.Val3837Ile variant was not identified in the literature nor was it identified in the GeneInsight-COGR, LOVD 3.0, databases. The variant was identified in dbSNP (ID: rs9474034) as With other allele, ClinVar (classified as benign by Initae, EGL Diagnistics; classified as likely benign by illumina), Clinvitae, RWTH AAachen University ARPKD database, databases. The variant was identified in control databases in 4161 of 276500 chromosomes (281 homozygous) at a frequency of 0.02 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). Breakdown of the observations by population include African in 3772 of 24000 chromosomes (freq: 0.2), Other in 47 of 6438 chromosomes (freq: 0.01), Latino in 264 of 34314 chromosomes (freq: 0.01), EuropeanNon-Finnish in 64 of 126248 chromosomes (freq: 0.001), and SouthAsian in 14 of 30766 chromosomes (freq: 0.001), while the variant was not observed in the Ashkenazi Jewish, East Asian, European Finnish, populations. The p.Val3837= residue is not conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein; however, this information is not predictive enough to rule out pathogenicity. The p.Val3837Ile variant occurs in the last three bases of the exon. This position has been shown to be part of the splicing consensus sequence and variants involving this position sometimes affect splicing. In addition, 2 of 5 in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) predict a greater than 10% difference in splicing. In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -

not provided

Benign:1

Jul 14, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.62

BayesDel_noAF

Benign

-0.52

CADD

Benign

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.18

Eigen

Benign

-0.57

Eigen_PC

Benign

-0.54

FATHMM_MKL

Benign

0.25

LIST_S2

Benign

0.71

MetaRNN

Benign

0.0017

MetaSVM

Benign

-0.86

MutationAssessor

Benign

1.6

PhyloP100

0.67

PrimateAI

Benign

0.32

PROVEAN

Benign

-0.55

REVEL

Benign

0.18

Sift

Benign

0.062

Sift4G

Benign

0.26

Polyphen

0.16

Vest4

0.018

MPC

0.062

ClinPred

0.0066

GERP RS

4.8

Varity_R

0.043

gMVP

0.18

Mutation Taster

=83/17

polymorphism (auto)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over