rs143017410

chr16-2109794-G-A

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_001009944.3(PKD1):c.5373C>T(p.Asn1791=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000647 in 1,609,974 control chromosomes in the GnomAD database, including 12 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0033 (5 hom., cov: 33)
  • Exomes 𝑓: 0.00037 (7 hom.)
• Consequence: PKD1 NM_001009944.3 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -0.507

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]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 16-2109794-G-A is Benign according to our data. Variant chr16-2109794-G-A is described in ClinVar as [Benign]. Clinvar id is 256977.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-2109794-G-A is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=-0.507 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00329 (501/152342) while in subpopulation AFR AF= 0.0111 (462/41568). AF 95% confidence interval is 0.0103. There are 5 homozygotes in gnomad4. There are 245 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High AC in GnomAd at 500 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PKD1	NM_001009944.3	c.5373C>T	p.Asn1791=	synonymous_variant	15/46	ENST00000262304.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PKD1	ENST00000262304.9	c.5373C>T	p.Asn1791=	synonymous_variant	15/46	1	NM_001009944.3	P5

Frequencies

GnomAD3 genomes AF: 0.00328 AC: 500 AN: 152224 Hom.: 5 Cov.: 33

Gnomad AFR AF: 0.0111

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00144

Gnomad ASJ AF: 0.000865

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00478

GnomAD3 exomes AF: 0.000710 AC: 172 AN: 242232 Hom.: 1 AF XY: 0.000483 AC XY: 64 AN XY: 132380

Gnomad AFR exome AF: 0.00946

Gnomad AMR exome AF: 0.000527

Gnomad ASJ exome AF: 0.000710

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000277

Gnomad OTH exome AF: 0.000508

GnomAD4 exome AF: 0.000371 AC: 541 AN: 1457632 Hom.: 7 Cov.: 34 AF XY: 0.000331 AC XY: 240 AN XY: 725102

Gnomad4 AFR exome AF: 0.0121

Gnomad4 AMR exome AF: 0.000582

Gnomad4 ASJ exome AF: 0.000880

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000348

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000315

Gnomad4 OTH exome AF: 0.000798

GnomAD4 genome AF: 0.00329 AC: 501 AN: 152342 Hom.: 5 Cov.: 33 AF XY: 0.00329 AC XY: 245 AN XY: 74496

Gnomad4 AFR AF: 0.0111

Gnomad4 AMR AF: 0.00144

Gnomad4 ASJ AF: 0.000865

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00473

Alfa AF: 0.00118 Hom.: 0

Bravo AF: 0.00392

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 29, 2020	This variant is associated with the following publications: (PMID: 22383692) -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	May 10, 2019	- -

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

-

- -

Polycystic kidney disease, adult type Benign:1

Benign, criteria provided, single submitter

clinical testing

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Oct 01, 2018

- -

Polycystic kidney disease Benign:1

Likely benign, no assertion criteria provided

clinical testing

Department of Pathology and Laboratory Medicine, Sinai Health System

-

The PKD1 p.Asn1791= variant was identified in 2 of 550 proband chromosomes (frequency: 0.003636) from individuals or families with autosomal dominant polycystic kidney disease (ADPKD) (Rossetti 2002, Rossetti 2012). The variant was also identified in dbSNP (ID: rs143017410) “With Benign allele,” ClinVar (as benign by Prevention Genetics), and ADPKD Mutation Database (2x as likely neutral). The variant was not identified in GeneInsight-COGR, LOVD 3.0, and PKD1-LOVD databases. The variant was identified in control databases in 265 of 269328 chromosomes at a frequency of 0.001 increasing the likelihood that this may be a low frequency benign variant in certain populations of origin (Genome Aggregation Consortium Feb 27, 2017), being identified in the following populations: African in 234 of 22952 chromosomes (frequency: 0.0102), Ashkenazi Jewish in 6 of 9984 chromosomes (frequency: 0.00006), Latino in 20 of 34170 chromosomes (frequency: 0.00006), Other in 2 of 6290 chromosomes (frequency: 0.00003), and European Non-Finnish in 3 of 122142 chromosomes (frequency: 0.00002). In addition we cannot be certain that data from control databases is specific to PKD1 and not from one of the six PKD1 pseudogenes. The p.Asn1791= variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. In addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
Cadd	Benign	0.12
Dann	Benign	0.68

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: rs143017410; hg19: chr16-2159795;