rs149111536

chr6-51619506-C-T

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 2P and 9B. PM2 BP4_Strong BP6 BS2

The NM_138694.4(PKHD1):c.11800G>A(p.Val3934Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000876 in 1,613,928 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. V3934V) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.00056 (1 hom., cov: 33)
  • Exomes 𝑓: 0.00091 (0 hom.)
• Consequence: PKHD1 NM_138694.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:4
• Conservation: PhyloP100: 0.414

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]

(HGNC:):

ACMG classification

Verdict is Benign. Variant got -7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.0139741).
• BP6: Variant 6-51619506-C-T is Benign according to our data. Variant chr6-51619506-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 289543.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Benign=1, Likely_benign=2}.
• BS2: High Homozygotes in GnomAdExome at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PKHD1	NM_138694.4	c.11800G>A	p.Val3934Ile	missense_variant	67/67	ENST00000371117.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PKHD1	ENST00000371117.8	c.11800G>A	p.Val3934Ile	missense_variant	67/67	1	NM_138694.4	P2
	ENST00000589278.6	n.811-2854C>T		intron_variant, non_coding_transcript_variant		5
	ENST00000454361.1	n.81-2849C>T		intron_variant, non_coding_transcript_variant		3
	ENST00000650088.1	n.222-2849C>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes AF: 0.000559 AC: 85 AN: 152178 Hom.: 1 Cov.: 33

Gnomad AFR AF: 0.0000966

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000188

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00100

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000459 AC: 115 AN: 250640 Hom.: 2 AF XY: 0.000480 AC XY: 65 AN XY: 135492

Gnomad AFR exome AF: 0.000247

Gnomad AMR exome AF: 0.000347

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: 0.000849

Gnomad OTH exome AF: 0.000491

GnomAD4 exome AF: 0.000909 AC: 1329 AN: 1461632 Hom.: 0 Cov.: 34 AF XY: 0.000890 AC XY: 647 AN XY: 727156

Gnomad4 AFR exome AF: 0.000269

Gnomad4 AMR exome AF: 0.000402

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.0000562

Gnomad4 NFE exome AF: 0.00112

Gnomad4 OTH exome AF: 0.000977

GnomAD4 genome AF: 0.000558 AC: 85 AN: 152296 Hom.: 1 Cov.: 33 AF XY: 0.000497 AC XY: 37 AN XY: 74468

Gnomad4 AFR AF: 0.0000963

Gnomad4 AMR AF: 0.000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000188

Gnomad4 NFE AF: 0.00100

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000635 Hom.: 0

Bravo AF: 0.000601

TwinsUK AF: 0.000809 AC: 3

ALSPAC AF: 0.00130 AC: 5

ESP6500AA AF: 0.000454 AC: 2

ESP6500EA AF: 0.00116 AC: 10

ExAC AF: 0.000478 AC: 58

EpiCase AF: 0.000982

EpiControl AF: 0.000652

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:4

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Autosomal recessive polycystic kidney disease Uncertain:1 Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Likely benign, no assertion criteria provided	clinical testing	Natera, Inc.	Aug 05, 2019	- -
Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 28, 2024	- -

not provided Uncertain:1 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 29, 2020	In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 29642553) -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jul 02, 2018	- -

PKHD1-related disorder Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 11, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.42	T
BayesDel_noAF	Benign	-0.42
Cadd	Benign	9.0
Dann	Benign	0.87
DEOGEN2	Benign	0.16	T
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.51
FATHMM_MKL	Benign	0.28	N
LIST_S2	Benign	0.59	T
M_CAP	Benign	0.042	D
MetaRNN	Benign	0.014	T
MetaSVM	Benign	-0.57	T
MutationAssessor	Uncertain	2.2	M
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.42	N
REVEL	Benign	0.17
Sift	Benign	0.073	T
Sift4G	Uncertain	0.049	D
Polyphen		0.0020	B
Vest4		0.083
MVP		0.64
MPC		0.057
ClinPred		0.030	T
GERP RS		2.6
Varity_R		0.038
gMVP		0.11

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

Other links and lift over

dbSNP: rs149111536; hg19: chr6-51484304; COSMIC: COSV100945523; COSMIC: COSV100945523;