16-2088757-T-TG

Position:

• chr16-2088757-T-TG

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_001009944.3(PKD1):​c.*969_*970insC variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00166 in 1,158,038 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as not provided (no stars).

• Frequency:
  • Genomes: 𝑓 0.0011 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0017 (1 hom.)
• Consequence: PKD1 NM_001009944.3 3_prime_UTR
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: -0.203

Genes affected

TSC2 (HGNC:12363): (TSC complex subunit 2) This gene is a tumor suppressor gene that encodes the growth inhibitory protein tuberin. Tuberin interacts with hamartin to form the TSC protein complex which functions in the control of cell growth. This TSC protein complex negatively regulates mammalian target of rapamycin complex 1 (mTORC1) signaling which is a major regulator of anabolic cell growth. Mutations in this gene have been associated with tuberous sclerosis and lymphangioleiomyomatosis. [provided by RefSeq, May 2022]

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 Likely_benign. Variant got -4 ACMG points.

• BS2: High AC in GnomAd4 at 169 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TSC2	NM_000548.5	c.*154dup		3_prime_UTR_variant	42/42	ENST00000219476.9
PKD1	NM_001009944.3	c.*969_*970insC		3_prime_UTR_variant	46/46	ENST00000262304.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TSC2	ENST00000219476.9	c.*154dup		3_prime_UTR_variant	42/42	5	NM_000548.5
PKD1	ENST00000262304.9	c.*969_*970insC		3_prime_UTR_variant	46/46	1	NM_001009944.3	P5

Frequencies

GnomAD3 genomes AF: 0.00112 AC: 169 AN: 151524 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000364

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000591

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00212

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00174 AC: 1748 AN: 1006396 Hom.: 1 Cov.: 14 AF XY: 0.00169 AC XY: 848 AN XY: 501294

Gnomad4 AFR exome AF: 0.000219

Gnomad4 AMR exome AF: 0.000667

Gnomad4 ASJ exome AF: 0.000107

Gnomad4 EAS exome AF: 0.000209

Gnomad4 SAS exome AF: 0.0000821

Gnomad4 FIN exome AF: 0.000131

Gnomad4 NFE exome AF: 0.00214

Gnomad4 OTH exome AF: 0.00138

GnomAD4 genome AF: 0.00111 AC: 169 AN: 151642 Hom.: 0 Cov.: 33 AF XY: 0.00108 AC XY: 80 AN XY: 74116

Gnomad4 AFR AF: 0.000363

Gnomad4 AMR AF: 0.000590

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000194

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00212

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00114

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Tuberous sclerosis syndrome Other:1

not provided, no classification provided

curation

Tuberous sclerosis database (TSC2)

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Computational scores

Source: dbNSFP v4.3

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: rs397514891; hg19: chr16-2138758;