rs76895755

Positions:

chr6-51883145-T-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_138694.4(PKHD1):c.7298A>T(p.Asp2433Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00193 in 1,612,624 control chromosomes in the GnomAD database, including 57 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.010 ( 29 hom., cov: 32)

Exomes 𝑓: 0.0011 ( 28 hom. )

Consequence

PKHD1
NM_138694.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 3.28

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 Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.007316977).

BP6

Variant 6-51883145-T-A is Benign according to our data. Variant chr6-51883145-T-A is described in ClinVar as [Benign]. Clinvar id is 167483.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.01 (1530/152288) while in subpopulation AFR AF= 0.034 (1413/41540). AF 95% confidence interval is 0.0325. There are 29 homozygotes in gnomad4. There are 703 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 29 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PKHD1	NM_138694.4 linkuse as main transcript	c.7298A>T	p.Asp2433Val	missense_variant	46/67	ENST00000371117.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PKHD1	ENST00000371117.8 linkuse as main transcript	c.7298A>T	p.Asp2433Val	missense_variant	46/67	1	NM_138694.4	P2	P08F94-1
PKHD1	ENST00000340994.4 linkuse as main transcript	c.7298A>T	p.Asp2433Val	missense_variant	46/61	5		A2	P08F94-2

Frequencies

GnomAD3 genomes

AF:

0.0100

AC:

1524

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0340

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00556

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00860

GnomAD3 exomes

AF:

0.00275

AC:

690

AN:

251176

Hom.:

AF XY:

0.00197

AC XY:

267

AN XY:

135758

show subpopulations

Gnomad AFR exome

AF:

0.0359

Gnomad AMR exome

AF:

0.00223

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000150

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.00108

AC:

1577

AN:

1460336

Hom.:

Cov.:

AF XY:

0.000950

AC XY:

690

AN XY:

726594

show subpopulations

Gnomad4 AFR exome

AF:

0.0352

Gnomad4 AMR exome

AF:

0.00248

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000162

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000729

Gnomad4 OTH exome

AF:

0.00303

GnomAD4 genome

AF:

0.0100

AC:

1530

AN:

152288

Hom.:

Cov.:

AF XY:

0.00944

AC XY:

703

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.0340

Gnomad4 AMR

AF:

0.00555

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00851

Alfa

AF:

0.00168

Hom.:

Bravo

AF:

0.0120

ESP6500AA

AF:

0.0340

AC:

150

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.00347

AC:

421

Asia WGS

AF:

0.00173

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Nov 25, 2013	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jul 18, 2019	Variant summary: PKHD1 c.7298A>T (p.Asp2433Val) results in a non-conservative amino acid change located in the Pectin lyase fold (IPR012334) of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0035 in 282570 control chromosomes, predominantly at a frequency of 0.035 within the African or African-American subpopulation in the gnomAD database, including 20 homozygotes. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 5 fold of the estimated maximal expected allele frequency for a pathogenic variant in PKHD1 causing Polycystic Kidney and Hepatic Disease phenotype (0.0071), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. To our knowledge, no occurrence of c.7298A>T in individuals affected with Polycystic Kidney and Hepatic Disease and no experimental evidence demonstrating its impact on protein function have been reported. One ClinVar submission (evaluation after 2014) classified the variant as benign. Based on the evidence outlined above, the variant was classified as benign. -

Autosomal recessive polycystic kidney disease

Benign:2

Benign, no assertion criteria provided	clinical testing	Natera, Inc.	May 11, 2017	- -
Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 31, 2024	- -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Mar 27, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.13

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.26

T;.

Eigen

Uncertain

0.27

Eigen_PC

Uncertain

0.35

FATHMM_MKL

Benign

0.69

LIST_S2

Uncertain

0.88

D;D

MetaRNN

Benign

0.0073

T;T

MetaSVM

Uncertain

-0.11

MutationAssessor

Uncertain

2.5

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.46

PROVEAN

Uncertain

-2.6

D;N

REVEL

Uncertain

0.40

Sift

Benign

0.039

D;D

Sift4G

Benign

0.25

T;T

Polyphen

0.67

P;P

Vest4

0.58

MVP

0.97

MPC

0.27

ClinPred

0.023

GERP RS

5.6

Varity_R

0.16

gMVP

0.77

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