Genetic Variant PKD1:p.Ala1818Glu (chr16-2109714-G-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001009944.3(PKD1):c.5453C>A(p.Ala1818Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,450,628 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1818V) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

PKD1
NM_001009944.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.40

Publications

0 publications found

Variant links:

Genes affected

PKD1 (HGNC:9008): (polycystin 1, transient receptor potential channel interacting) This gene encodes a member of the polycystin protein family. The encoded glycoprotein contains a large N-terminal extracellular region, multiple transmembrane domains and a cytoplasmic C-tail. It is an integral membrane protein that functions as a regulator of calcium permeable cation channels and intracellular calcium homoeostasis. It is also involved in cell-cell/matrix interactions and may modulate G-protein-coupled signal-transduction pathways. It plays a role in renal tubular development, and mutations in this gene cause autosomal dominant polycystic kidney disease type 1 (ADPKD1). ADPKD1 is characterized by the growth of fluid-filled cysts that replace normal renal tissue and result in end-stage renal failure. Splice variants encoding different isoforms have been noted for this gene. Also, six pseudogenes, closely linked in a known duplicated region on chromosome 16p, have been described. [provided by RefSeq, Oct 2008]

PKD1 Gene-Disease associations (from GenCC):

autosomal dominant polycystic kidney disease
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
polycystic kidney disease 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
autosomal recessive polycystic kidney disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Caroli disease
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp

PKD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.37888527).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PKD1	NM_001009944.3 link	c.5453C>A	p.Ala1818Glu	missense_variant	Exon 15 of 46	ENST00000262304.9	NP_001009944.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PKD1	ENST00000262304.9 link	c.5453C>A	p.Ala1818Glu	missense_variant	Exon 15 of 46	1	NM_001009944.3	ENSP00000262304.4		P98161-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000441

AC:

AN:

227002

AF XY:

0.00000805

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000100

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000138

AC:

AN:

1450628

Hom.:

Cov.:

AF XY:

0.00000277

AC XY:

AN XY:

720948

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33228

American (AMR)

AF:

0.00

AC:

AN:

43396

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25926

East Asian (EAS)

AF:

0.00

AC:

AN:

39338

South Asian (SAS)

AF:

0.00

AC:

AN:

85116

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51372

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4166

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1108278

Other (OTH)

AF:

0.00

AC:

AN:

59808

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000834

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Benign

-0.38

CADD

Benign

4.2

(source)

DANN

Benign

0.86

DEOGEN2

Benign

0.26

T;.

Eigen

Benign

-0.74

Eigen_PC

Benign

-0.88

FATHMM_MKL

Benign

0.20

LIST_S2

Benign

0.60

T;T

M_CAP

Uncertain

0.27

MetaRNN

Benign

0.38

T;T

MetaSVM

Benign

-0.86

MutationAssessor

Benign

1.9

L;L

PhyloP100

1.4

PrimateAI

Benign

0.46

PROVEAN

Benign

-1.4

N;N

REVEL

Benign

0.20

Sift

Benign

0.59

T;T

Sift4G

Benign

0.20

T;T

Polyphen

0.44

B;B

Vest4

0.28

MutPred

0.75

Gain of disorder (P = 0.0426);Gain of disorder (P = 0.0426);

MVP

0.85

ClinPred

0.087

GERP RS

-1.4

Varity_R

0.22

gMVP

0.59

Mutation Taster

=75/25

polymorphism

(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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over