6-52024611-G-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_138694.4(PKHD1):c.5199C>A(p.Thr1733Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00287 in 1,614,106 control chromosomes in the GnomAD database, including 102 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. T1733T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.015 ( 46 hom., cov: 32)

Exomes 𝑓: 0.0016 ( 56 hom. )

Consequence

PKHD1
NM_138694.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: -2.11

Publications

3 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 -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.96).

BP6

Variant 6-52024611-G-T is Benign according to our data. Variant chr6-52024611-G-T is described in ClinVar as Benign. ClinVar VariationId is 241846.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.11 with no splicing effect.

BA1

GnomAdExome4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0521 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_138694.4. 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
	PKHD1	NM_138694.4	MANE Select	c.5199C>A	p.Thr1733Thr	synonymous	Exon 32 of 67	NP_619639.3
	PKHD1	NM_170724.3		c.5199C>A	p.Thr1733Thr	synonymous	Exon 32 of 61	NP_733842.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PKHD1	ENST00000371117.8	TSL:1 MANE Select	c.5199C>A	p.Thr1733Thr	synonymous	Exon 32 of 67	ENSP00000360158.3
	PKHD1	ENST00000340994.4	TSL:5	c.5199C>A	p.Thr1733Thr	synonymous	Exon 32 of 61	ENSP00000341097.4

Frequencies

GnomAD3 genomes

AF:

0.0146

AC:

2226

AN:

152126

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0514

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00353

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00637

Gnomad NFE

AF:

0.000294

Gnomad OTH

AF:

0.0105

GnomAD2 exomes

AF:

0.00393

AC:

987

AN:

251182

AF XY:

0.00311

show subpopulations

Gnomad AFR exome

AF:

0.0512

Gnomad AMR exome

AF:

0.00286

Gnomad ASJ exome

AF:

0.0000993

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000326

Gnomad OTH exome

AF:

0.00180

GnomAD4 exome

AF:

0.00164

AC:

2396

AN:

1461862

Hom.:

Cov.:

AF XY:

0.00147

AC XY:

1069

AN XY:

727230

show subpopulations

African (AFR)

AF:

0.0542

AC:

1815

AN:

33476

American (AMR)

AF:

0.00288

AC:

129

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000301

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00277

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000156

AC:

174

AN:

1111994

Other (OTH)

AF:

0.00389

AC:

235

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

143

286

428

571

714

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

180

240

300

<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:

0.0147

AC:

2234

AN:

152244

Hom.:

Cov.:

AF XY:

0.0140

AC XY:

1042

AN XY:

74436

show subpopulations

African (AFR)

AF:

0.0514

AC:

2135

AN:

41524

American (AMR)

AF:

0.00353

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.000208

AC:

AN:

4812

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00685

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.000294

AC:

AN:

68026

Other (OTH)

AF:

0.0104

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

104

208

313

417

521

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

120

<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:

0.00308

Hom.:

Bravo

AF:

0.0170

EpiCase

AF:

0.000382

EpiControl

AF:

0.000652

ClinVar

Significance: Benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive polycystic kidney disease

Benign:3

Nov 14, 2017

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign.

Jun 30, 2017

Natera, Inc.

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not specified

Benign:2

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Jul 09, 2015

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Benign:2

Apr 26, 2016

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: The c.5199C>A variant involves the alteration of a non-conserved nucleotide resulting in a synonymous change. 4/5 in silico tools via Alamut predict no significant effect on splicing. The variant was observed in the large and broad cohorts of the ExAC project at an allele frequency of 0.50%, predominantly observed in the African subpopulation at a frequency of 5.2% including 14 homozygous occurrences. This frequency exceeds the maximal expected allele frequency for a pathogenic variant in PKHD1 (0.70%), suggesting this is a benign polymorphism found primarily in population(s) of African origin. One reputable clinical lab has classified the variant as "benign" and multiple publications consider the variant to be a polymorphism. Taken together, this variant has been classified as Benign.

Jul 14, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Polycystic kidney disease 4

Benign:1

Sep 27, 2019

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.96

CADD

Benign

0.011

(source)

DANN

Benign

0.37

PhyloP100

-2.1

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over