3-190296916-C-T

Variant names:

• chr3-190296916-C-T
• rs9878318
• NM_001378492.1:c.-446+6325C>T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001378492.1(CLDN16):​c.-446+6325C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.578 in 151,830 control chromosomes in the GnomAD database, including 26,037 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.58 (26037 hom., cov: 31)
• Consequence: CLDN16 NM_001378492.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.627

Genes affected

CLDN16 (HGNC:2037): (claudin 16) Tight junctions represent one mode of cell-to-cell adhesion in epithelial or endothelial cell sheets, forming continuous seals around cells and serving as a physical barrier to prevent solutes and water from passing freely through the paracellular space. These junctions are comprised of sets of continuous networking strands in the outwardly facing cytoplasmic leaflet, with complementary grooves in the inwardly facing extracytoplasmic leaflet. The protein encoded by this gene, a member of the claudin family, is an integral membrane protein and a component of tight junction strands. It is found primarily in the kidneys, specifically in the thick ascending limb of Henle, where it acts as either an intercellular pore or ion concentration sensor to regulate the paracellular resorption of magnesium ions. Defects in this gene are a cause of primary hypomagnesemia, which is characterized by massive renal magnesium wasting with hypomagnesemia and hypercalciuria, resulting in nephrocalcinosis and renal failure. This gene and the CLDN1 gene are clustered on chromosome 3q28. [provided by RefSeq, Jun 2010]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.0).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.7 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLDN16	NM_001378492.1	c.-446+6325C>T		intron_variant	Intron 1 of 8		NP_001365421.1
CLDN16	NM_001378493.1	c.-279+6325C>T		intron_variant	Intron 1 of 7		NP_001365422.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt

Frequencies

GnomAD3 genomes AF: 0.578 AC: 87679 AN: 151712 Hom.: 25997 Cov.: 31

Gnomad AFR AF: 0.707

Gnomad AMI AF: 0.595

Gnomad AMR AF: 0.531

Gnomad ASJ AF: 0.463

Gnomad EAS AF: 0.683

Gnomad SAS AF: 0.358

Gnomad FIN AF: 0.560

Gnomad MID AF: 0.529

Gnomad NFE AF: 0.527

Gnomad OTH AF: 0.564

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.578 AC: 87766 AN: 151830 Hom.: 26037 Cov.: 31 AF XY: 0.575 AC XY: 42655 AN XY: 74198

Gnomad4 AFR AF: 0.707

Gnomad4 AMR AF: 0.530

Gnomad4 ASJ AF: 0.463

Gnomad4 EAS AF: 0.683

Gnomad4 SAS AF: 0.357

Gnomad4 FIN AF: 0.560

Gnomad4 NFE AF: 0.527

Gnomad4 OTH AF: 0.559

Alfa AF: 0.531 Hom.: 43457

Bravo AF: 0.586

Asia WGS AF: 0.491 AC: 1708 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	2.4
DANN	Benign	0.63

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs9878318; hg19: chr3-190014705;